CN107058666A - A kind of cooling gas system for shaft furnace cooling section - Google Patents
A kind of cooling gas system for shaft furnace cooling section Download PDFInfo
- Publication number
- CN107058666A CN107058666A CN201710523672.4A CN201710523672A CN107058666A CN 107058666 A CN107058666 A CN 107058666A CN 201710523672 A CN201710523672 A CN 201710523672A CN 107058666 A CN107058666 A CN 107058666A
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- cooling
- gas
- air inlet
- getter
- shaft furnace
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- 238000001816 cooling Methods 0.000 title claims abstract description 216
- 239000000112 cooling gas Substances 0.000 title claims abstract description 216
- 239000007789 gas Substances 0.000 claims abstract description 153
- 238000006722 reduction reaction Methods 0.000 claims abstract description 54
- 230000009467 reduction Effects 0.000 claims abstract description 41
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 29
- 238000005255 carburizing Methods 0.000 claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 154
- 229910052742 iron Inorganic materials 0.000 claims description 77
- 239000000463 material Substances 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 22
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 18
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 13
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 13
- 239000011707 mineral Substances 0.000 claims description 13
- 239000008246 gaseous mixture Substances 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 8
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 7
- 239000001569 carbon dioxide Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000008188 pellet Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 3
- DPTATFGPDCLUTF-UHFFFAOYSA-N phosphanylidyneiron Chemical compound [Fe]#P DPTATFGPDCLUTF-UHFFFAOYSA-N 0.000 claims 1
- 230000002411 adverse Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 35
- 238000013461 design Methods 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000005406 washing Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000011173 large scale experimental method Methods 0.000 description 2
- -1 meanwhile Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 230000005619 thermoelectricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229940038031 nitrogen 10 % Drugs 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0073—Selection or treatment of the reducing gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention belongs to metallurgical technology field, and in particular to a kind of cooling gas system for shaft furnace cooling section.The cooling gas system includes cooling gas air inlet pipeline, cooling gas getter pipeline, cooling and dedusting device, pressure-raising device, air inlet switching valve group, carburizing device of air and furnace burdening temperature measurement device, wherein, cooling gas air inlet pipeline includes air inlet endless tube and multiple air inlets；Cooling down gas getter pipeline includes getter endless tube, multiple getters mouth and multiple getter covers；Cooling and dedusting device is connected with plug for outlet；Air inlet switching valve group air intake be connected respectively with pressure-raising device and carburizing device of air, gas outlet with it is described enter fire door be connected；Furnace burdening temperature measurement device is located at below air inlet pipeline.Thus, the cooling gas system is using the uniform multiple air inlets of endless tube, multiple getters mouthful and getter cover, cooling section intake uniformity is ensure that, high efficiente callback cooling gas is realized, is not reclaimed effectively so as to reduce cooling gas and rises to reduction section and reduction reaction is adversely affected.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of gas base of direct-reduction iron-bearing mineral production sponge iron is erected
The cooling section cooling gas air inlet of stove bottom and getter pipeline system design.
Technical background
Currently, gas-based shaft kiln technique accounts for more than half of world's direct reduction iron making yield, is most ripe sponge iron life
Production. art.2015, whole world DRI yield was 72,570,000 tons, wherein, gas-based shaft kiln method production DRI is about
Account for 80%.Gas-based shaft kiln directly reduced ironmaking is most important non-blast furnace ironmaking method, and its product is DRI（It is also known as extra large
Continuous iron）, be mainly used as the raw material of electric furnace steel making, also can as pneumatic steelmaking cooling agent.
Existing gas-based shaft kiln technique is more all to be entered after heat exchange from cooling section top quilt using cooling gas from shaft furnace bottom
Discharge is collected, again returns in shaft furnace use after treatment.It is usual from top to bottom inside existing gas-based shaft kiln, most shaft furnace
It is divided into three parts, i.e. preheating section, reduction section, three parts of cooling section, the concrete operations mode of the shaft furnace is：Iron Oxide Minerals
Fully reduction is obtained in reduction section after being preheated by preheating section and produce hot product, continue downwards into the cooling of shaft furnace bottom
Section, by the cooling air cooling from bottom, sponge iron temperature requirement when being come out of the stove with reaching；Cooling section cooling gas enters stove and collection
Mode can influence sponge iron cooling effect while influenceing the course of reaction of reduction section and the use of corresponding corollary equipment；Meanwhile,
Also Primordial Qi is passed through in stove in the middle part of the shaft furnace, and ore is added at the top of shaft furnace, and Gas-solid Two-phase Flow is in the opposite direction fully to enter
Row heat exchange；Wherein, using CO and H2As also Primordial Qi raw material, reduction of iron oxide-containing mineral obtain product inside shaft furnace.
As can be seen here, during the use of whole shaft furnace, the air inlet of shaft furnace cooling section cooling gas, getter circuit design are to ensure directly also
The important component of former iron cooling effect, while reduction of iron ore reaction of its circuit design mounting means to reduction section also has certain
Influence.But, current large-scale experiment shaft furnace and industrial shaft furnace air inlet and getter system all be present：（1）It is existing enter
Gas system is entered using single port or straight tube enters, and cooling gas enters skewness after shaft furnace, and each region of same level is cold
But effect is different, and cooling gas heat transfer effect is undesirable, and utilization rate is low, and to there is local temperature inclined for shaft furnace cooling section sponge iron
High situation；（2）Cooling gas cooling section and sponge iron heat exchange after continue up, due to getter pipeline system design simply or
Arrangement is unreasonable, causes getter effect not good, and part cooling gas could not effectively be collected and continue to ascend into reduction shaft furnace section, shadow
Reduction of iron ore reaction effect is rung；Made moderate progress according to multiple rows of straight tube getter effect, but there can be pipeline and use material
It is many, hinder the smooth descending situation of material stove.In brief, current large-scale experiment shaft furnace and industrial shaft furnace air inlet and getter system be all
In the presence of arranging unreasonable to a certain degree, using single air inlet, getter mouthful or single straight tube and multiple rows of straight tube as air inlet pipe,
Getter pipe, design is simple, and it is not good to there is cooling gas circulating effect, cools down the low problem of gas utilization rate.Therefore, how one is designed
Kind of connection and reasonable arrangement, cooling gas circulating effect are good, cooling gas utilization rate is high for shaft furnace cooling section the air inlet of cooling gas and getter
System, the problem as current urgent need to resolve.
The content of the invention
For above-mentioned problem present in prior art, the invention provides a kind of cooling gas system for shaft furnace cooling section
System, the cooling gas system is evenly arranged multiple air inlets and multiple getters mouthful using endless tube, while getter mouthful is welded with getter cover,
Ensure that shaft furnace cooling section cool down gas intake uniformity, and cool down gas reclaim realize it is more efficient, so as to reduce cooling gas
Do not reclaimed effectively and rise to the adverse effect that reduction shaft furnace section is brought to reduction reaction；The cooling gas system is using cooling gas
Endless tube getter cover is directly welded on getter mouthful, while ensureing to increase effective getter area to the top-down effect of furnace charge very
It is small, obvious delay effect will not be produced to sponge iron, it can be ensured that the sponge iron of cooling procedure is smoothly descending, also, enters, receives
Air pipe and getter cover make simple, are easy to implement；The cooling gas system is monitored and air inlet converting system by furnace bottom material temperature,
On the premise of ensureing the cooling of sponge iron product, realize that the control of carburetted gas is added, effectively improve carbon containing in product sponge iron
Amount, improves product quality.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
The invention provides a kind of cooling gas system for shaft furnace cooling section, it is characterised in that including：Cool down gas air inlet pipe
Road, cooling gas getter pipeline, cooling and dedusting device, pressure-raising device, air inlet switching valve group, carburizing device of air and furnace burdening temperature measurement
Device, wherein：The cooling gas air inlet pipeline is horizontally placed on the bottom of shaft furnace cooling section, it include air inlet endless tube and it is multiple enter
The multiple air inlet is distributed with gas port, the bottom of the air inlet endless tube, and the cooling gas of the air inlet endless tube and the shaft furnace enters
Fire door is connected；The cooling gas getter pipeline is horizontally placed on the top of shaft furnace cooling section, and it includes getter endless tube, multiple getters
Mouth and multiple getter covers, the getter endless tube are connected with the cooling gas plug for outlet of the shaft furnace, the bottom of the getter endless tube
The multiple getter mouthful is provided with, the upper end of each getter mouthful is connected with the getter endless tube, under the getter mouthful
End opening and the getter cover for being fixed with taper；The cooling and dedusting device is connected with the plug for outlet, for will be described cold
But the gas of gas getter pipeline discharge carries out cooling dust removal process；The pressure-raising device is connected with the cooling and dedusting device, is used
Pressure-raising processing is carried out in the gas for discharging the cooling and dedusting device；The air intake of air inlet switching valve group respectively with it is described
The gas outlet of pressure-raising device and the connection of the gas outlet of the carburizing device of air, the gas outlet of air inlet switching valve group with it is described enter
Fire door is connected, and controls cooling gas and carburetted gas switching to be transported to the cooling gas for discharging the temperature of material according to cooling section
In air inlet pipeline, the addition of carburetted gas is controlled；The furnace burdening temperature measurement device is arranged under the cooling gas air inlet pipeline
Side, for monitoring the temperature of charge after cooling section cooling treatment in real time.
According to a particular embodiment of the invention, the side tangent line of the multiple getter cover and the angle of horizontal plane be 45 °-
60°。
According to a particular embodiment of the invention, the multiple air inlet and the multiple getter mouthful and the multiple getter cover
Quantity it is identical, be 6-12.
According to a particular embodiment of the invention, the cooling gas air inlet pipeline is located above outlet valve, the multiple air inlet
Open Side Down for mouth；The cooling gas getter pipeline is less than the also Primordial Qi entrance of shaft furnace, and Open Side Down for the multiple getter mouthful.
According to a particular embodiment of the invention, the cooling gas of the air inlet endless tube is passed through not occur chemistry with iron-bearing mineral
The inert gas of reaction, the carburetted gas that the carburizing device of air is produced is the mixing of carbon dioxide, carbon monoxide and methane gas
Gaseous mixture of the gas either also containing part nitrogen or hydrogen.
According to a particular embodiment of the invention, in addition to air intake control system, the air intake control system respectively with it is described
Air inlet switches material in valve group and furnace burdening temperature measurement device connection, the stove monitored according to the furnace burdening temperature measurement device
Temperature, automatically controls the air inlet switching valve group and switches over source of the gas to cooling gas and carburetted gas.
According to a particular embodiment of the invention, the furnace burdening temperature measurement device is single-point or multipoint thermocouple thermometric, is incited somebody to action
Temperature value feeds back to the air intake control system.
According to a particular embodiment of the invention, the inner chamber of the shaft furnace be vertically followed successively by from top to bottom preheating section,
Reduction section and cooling section, the also Primordial Qi entrance of the shaft furnace is arranged on the side wall of reduction shaft furnace section, and the shaft furnace goes out
Material valve is arranged on the bottom wall of the shaft furnace.
Meanwhile, present invention also offers a kind of method for carrying out cooling gas disposal using above-mentioned cooling gas system, including
Following steps：
（1）Shaft furnace top loads solid ferruginous mineral lump ore or pellet as raw material, is moved from top to bottom in shaft furnace, through perpendicular
Stove reduction section is reduced after gas fully reduces, and is obtained sponge iron, is continued traveling downwardly to cooling section；
（2）The sponge iron is continued traveling downwardly to shaft furnace cooling section, and it is cold that raw material after carrying out reduction is cooled that gas air inlet pipeline is passed through
But gas carries out cooling treatment, and the sponge iron cooled down is discharged via the outlet valve of shaft furnace；
（3）The cooling gas is up, and cooling gas getter pipeline is entered after being collected via multiple getter covers, is discharged via plug for outlet perpendicular
Stove, passes sequentially through the cooling and dedusting device and carries out cooling dust removal process, enters the pressure-raising device progress pressure-raising processing, then
It is secondary to switch the bottom that valve group, the cooling gas air inlet pipeline are passed into shaft furnace cooling section via air inlet, to the thing of shaft furnace cooling section
Material carries out cooling treatment.
According to a particular embodiment of the invention, in step（2）In, during cooling gas continuous firing, furnace bottom material temperature is surveyed
Temperature of the device monitoring shaft furnace furnace charge after cooling treatment is measured, and temperature value is fed back into the air intake control system, works as temperature
When value reaches 90 DEG C, air intake control system stops the cooling gas air inlet that the air inlet switches valve group, switches to carburetted gas air inlet, together
When stop pressure-raising device work so that be only passed through carburetted gas in the cooling gas air inlet pipeline, carburetted gas not via
Arranged outside the cooling gas getter pipeline, but directly rise to the reduction reaction that reduction shaft furnace section participates in raw material, to shaft furnace bottom
Sponge iron play carburization, improve the phosphorus content in sponge iron；When temperature value is higher than setting value, air intake control system stops
Only carburetted gas air inlet, switches to the air inlet to switch the cooling gas air inlet of valve group, while opening the pressure-raising device work, makes sea
100-140 DEG C is cooled to during continuous iron discharge shaft furnace, so that realize that cooling gas carries out cooling treatment to the sponge iron of shaft furnace bottom,
Sponge iron is prevented to be again be oxidized after coming out of the stove.
Beneficial effects of the present invention are as follows：
（1）The invention provides a kind of cooling gas system for shaft furnace cooling section, the cooling gas system uses the uniform cloth of endless tube
Multiple air inlets and multiple getters mouthful are put, while getter mouthful is welded with getter cover, it is ensured that the cooling gas air inlet of shaft furnace cooling section is equal
Even property, also, cooling gas recovery realization is more efficient, is not reclaimed effectively so as to reduce cooling gas and rises to reduction shaft furnace
The adverse effect that section is brought to reduction reaction.
（2）The invention provides a kind of cooling gas system for shaft furnace cooling section, the cooling gas system is using cooling gas
Endless tube getter cover is directly welded on getter mouthful, while ensureing to increase effective getter area to the top-down effect of furnace charge very
It is small, obvious delay effect will not be produced to sponge iron, thus, it is possible to ensure that the sponge iron of cooling procedure is smoothly descending, moreover,
Enter, getter pipeline and getter cover make simple, be easy to implement.
（3）The invention provides a kind of cooling gas system for shaft furnace cooling section, the cooling gas system passes through furnace burdening
Temperature monitoring and air inlet converting system, on the premise of the cooling of sponge iron product is ensured, realize that the control of carburetted gas is added, effectively change
It has been apt to the phosphorus content in product sponge iron, has improved product quality.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is getter cover schematic diagram of the invention.
Fig. 3 is getter pipe diagrammatic cross-section of the invention.
Wherein, 1, iron-bearing mineral entrance, 2, top gas outlet, 3, also Primordial Qi entrance, 4, getter endless tube, 5, getter mouthful, 6,
Cool down gas plug for outlet, 7, getter cover, 8, air inlet, 9, air inlet endless tube, 10, cooling gas enter fire door, 11, cooling and dedusting device, 12,
Pressure-raising device, 13, outlet valve, 14, furnace burdening temperature measurement device, 15, air intake control system, 16, air inlet switching valve group, 17, pre-
Hot arc, 18, reduction section, 19, cooling section.
Embodiment
Embodiments of the invention are described below in detail.The embodiments described below is exemplary, is only used for explaining this hair
It is bright, and be not considered as limiting the invention.Unreceipted particular technique or condition in embodiment, according to text in the art
Offer described technology or condition or carried out according to product description.Agents useful for same or the unreceipted production firm person of instrument,
For can be by the conventional products of acquisition purchased in market.
In the description of the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as indicating or implies relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define " the
One ", one or more this feature can be expressed or be implicitly included to the feature of " second ".In the description of the invention,
" multiple " are meant that two or more, unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
According to an aspect of the present invention, the invention provides a kind of cooling gas system for shaft furnace cooling section, including：
Cool down gas air inlet pipeline, cooling gas getter pipeline, cooling and dedusting device 11, pressure-raising device 12, air inlet switching valve group 16, carburetted gas
Device and furnace burdening temperature measurement device 14, wherein：The cooling gas air inlet pipeline is horizontally placed on the bottom of shaft furnace cooling section, bag
Air inlet endless tube 9 and multiple air inlets 8 are included, the multiple air inlet, the air inlet endless tube is distributed with the bottom of the air inlet endless tube
Enter fire door 10 with the cooling gas of the shaft furnace to be connected；The cooling gas getter pipeline is horizontally placed on the top of shaft furnace cooling section,
Including getter endless tube 4, multiple getters mouthful 5 and multiple getter covers 7, the cooling gas plug for outlet 6 of the getter endless tube and the shaft furnace
It is connected, the bottom of the getter endless tube is provided with the multiple getter mouthful, the upper end of each getter mouthful and the getter
Endless tube is connected, and lower ending opening and getter mouthful outer end of the getter mouthful are fixed with the getter cover of taper；The cooling is removed
Dirt device is connected with the plug for outlet；The pressure-raising device is connected with the cooling and dedusting device；The air inlet switching valve group
Air intake is connected with the gas outlet of the pressure-raising device and the gas outlet of the carburizing device of air respectively, and the air inlet switches valve group
Gas outlet with it is described enter fire door be connected；The furnace burdening temperature measurement device is arranged on the lower section of the cooling gas air inlet pipeline.
Inventor has found that the invention provides a kind of cooling gas system for shaft furnace cooling section, cooling gas system profit
With rational cooling gas air inlet pipeline and getter pipeline system design, improve after the cooling gas air inlet distribution of shaft furnace cooling section and heat exchange
Cool down each spot temperature in gas collecting effect, equalizing furnace, reduce local temperature too high situation in same level face in stove, optimize shaft furnace
Cooling section sponge iron cooling effect；In addition, the cooling gas system ensures that gas is reclaimed by cooling down gas getter mouthful, the design of getter cover
More efficiently, reduce the ratio that cooling gas is not risen to reduction shaft furnace section by effective collection, preferably ensure that reduction shaft furnace section is main
The progress of reaction；Meanwhile, the air inlet pipeline and getter pipeline system design that the present invention is used do not influence the smooth descending of furnace charge, enter
Tracheae ensure that the uniform of air inlet by the design of many mouthfuls of air inlets, moreover, getter mouthful is upper directly to weld getter cover, in enhancing getter
Obvious obstruction will not be produced while effect to the direct motion of sponge iron product, meanwhile, pipeline is simple to manufacture, and is easy to implement；In addition, should
Gas system is cooled down by the way of furnace bottom drop temperature monitoring system is set, passes through procedure auto-control, switching cooling gas system
Source of the gas, on the premise of cooling effect is ensured, realizes carburization, the composition of sponge iron product is optimized, effectively improved
Product quality.
The invention provides a kind of cooling gas system for shaft furnace cooling section, including cooling gas air inlet pipeline, for inciting somebody to action
Cooling gas is transported in the cooling section of the shaft furnace.Further, the cooling gas air inlet pipeline is horizontally placed on shaft furnace cooling
The bottom of section, the cooling gas air inlet pipeline is located at the top of outlet valve 13, the cooling for cooling gas to be transported to the shaft furnace
Section hypomere, the top for being placed in outlet valve, carry out fully, thoroughly cooling down to ensure to cool down gas to the material in the shaft furnace
Processing.
According to a particular embodiment of the invention, the cooling gas air inlet pipeline includes air inlet endless tube 9 and multiple air inlets 8；
Wherein, the air inlet endless tube enters fire door 10 with the cooling gas of the shaft furnace and is connected, for will cool down gas via the cold of the shaft furnace
But gas enters fire door and is transported in the air inlet endless tube；The multiple air inlet is distributed in the bottom of the air inlet endless tube, for inciting somebody to action
Cooling gas in the air inlet endless tube at the multiple air inlet via being discharged into the cooling section of the shaft furnace.Further,
The multiple air inlet is located at the bottom of the shaft furnace cooling section, and in the top of outlet valve 13, for cooling gas to be conveyed
Cooling section hypomere to the shaft furnace, the top for being placed in outlet valve, are carried out with ensureing to cool down gas to the material in the shaft furnace
Fully, thoroughly cooling treatment.It is preferred that, Open Side Down for the multiple air inlet, is ensureing cooling gas via described many
On the premise of individual air inlet is discharged into the cooling section of the shaft furnace, it is to avoid the material in the shaft furnace enters the multiple air inlet
The blocking of the cooling gas air inlet pipeline is caused in mouthful, and does not influence the smooth descending of material, meanwhile, air inlet pipeline is using more
The set-up mode of individual air inlet ensure that the uniform of air inlet.According to a particular embodiment of the invention, it is passed through the air inlet endless tube
Cooling gas is the inert gas not chemically reacted with iron-bearing mineral, and the carburetted gas that the carburizing device of air is produced is titanium dioxide
Gaseous mixture of the gaseous mixture of carbon, carbon monoxide and methane gas either also containing part nitrogen or hydrogen.
According to a particular embodiment of the invention, the quantity and distribution mode of the multiple air inlet are not particularly limited, only
It ensure that cooling gas is evenly distributed in the cooling section of the shaft furnace.The quantity of the multiple air inlet with it is described many
The quantity of individual getter mouthful and the multiple getter cover is identical；The multiple air inlet is evenly distributed on the bottom of the air inlet endless tube
Portion；The air inlet endless tube is 360 ° of circular endless tube.It is preferred that, the quantity of the multiple air inlet is 6-12；It is the multiple
The spacing of each two air inlet of air inlet is 60 ° -30 °, i.e. due to 360 ° of endless tube circumference, so according to air inlet quantity, two
Spacing of the individual air inlet on air inlet endless tube circumference is 60 ° -30 °；Therefore, the external diameter of the invention by according to air inlet endless tube is come cloth
Put suitable air inlet quantity, it is ensured that cooling gas even into；Also, pipeline is simple to manufacture, it is easy to implement.
The invention provides a kind of cooling gas system for shaft furnace cooling section, including cooling gas getter pipeline, for inciting somebody to action
Cooling gas after cooling treatment, being heated by material is carried out in the cooling section of the shaft furnace and discharges the shaft furnace.According to the present invention
Specific embodiment, the cooling gas getter pipeline is horizontally placed on the top of shaft furnace cooling section, and the also Primordial Qi less than shaft furnace enters
Cooling gas after cooling treatment, being heated by material is carried out in mouth 3, the cooling section for absorbing the shaft furnace, and is discharged it
The shaft furnace.Further, the cooling gas getter pipeline includes getter endless tube 4, multiple getters mouth 5 and multiple getter covers 7, institute
State getter endless tube with the cooling gas plug for outlet 6 of the shaft furnace to be connected, the bottom of the getter endless tube is provided with the multiple receipts
Gas port, the upper end of each getter mouthful is connected with the getter endless tube, outside the lower ending opening and getter mouthful of the getter mouthful
End is fixed with the getter cover of taper.
According to a particular embodiment of the invention, the cooling gas getter pipeline includes getter endless tube, multiple getters mouthful and many
Individual getter cover, wherein, the getter endless tube is connected with the cooling gas plug for outlet of the shaft furnace, for by the getter endless tube
Cool down gas and discharge the shaft furnace via the cooling gas plug for outlet of the shaft furnace；The bottom of the getter endless tube is provided with the multiple
Getter mouthful, for cooling gas after cooling treatment, being heated by material will to be carried out in the cooling section of the shaft furnace via getter mouthful
It is recovered in the getter endless tube.Further, Open Side Down for the multiple getter mouthful, the upper end of each getter mouthful with
The getter endless tube is connected, and lower ending opening and getter mouthful outer end of the getter mouthful are fixed with the getter cover of taper；And
And, the multiple getter mouthful of the cooling gas system is located at the top of the multiple air inlet, can there is certain position during installation
Put deviation；Thus, the present invention is evenly arranged multiple air inlets and multiple getters mouthful using endless tube, while getter mouthful is fixed with getter
Cover, it is ensured that shaft furnace cooling section cool down gas intake uniformity, and cool down gas reclaim realize it is more efficient, so reduce cooling
Gas is not reclaimed effectively and rises to the adverse effect that reduction shaft furnace section is brought to reduction reaction.It is preferred that, the getter mouthful
Lower ending opening and getter mouthful the outer end fixed getter cover by the way of welding；Thus, the present invention will be by that will cool down compression ring
Pipe getter cover is directly welded on getter mouthful, to the top-down effect very little of furnace charge while ensureing to increase effective getter area,
Obvious delay effect will not be produced to sponge iron, it can be ensured that the sponge iron of cooling procedure is smoothly descending；Moreover, getter pipeline
And getter cover makes simple, is easy to implement.
According to a particular embodiment of the invention, the quantity and distribution mode of the multiple getter mouthful are not particularly limited, only
It ensure that the cooling gas after cooling treatment is completed in the cooling section of the shaft furnace uniformly reclaim.It is the multiple to receive
The quantity of gas port and the multiple getter cover is identical with the quantity of the multiple air inlet；The multiple getter mouthful is evenly distributed on
The bottom of the getter endless tube；The getter endless tube is 360 ° of circular endless tube.It is preferred that, the multiple getter mouthful and described many
The quantity of individual getter cover is 6-12；The spacing b of each two getter mouthful is 60 ° -30 °, and the spacing of each two getter cover is
60 ° -30 °, i.e. due to 360 ° of endless tube circumference, so the quantity according to getter mouthful, two getters mouthful are on getter endless tube circumference
Spacing b is 60 ° -30 °；Therefore, the present invention arranges suitable getter mouthful quantity by the external diameter according to getter endless tube, it is ensured that cold
But the uniform recovery of gas；Also, pipeline is simple to manufacture, it is easy to implement.It is preferred that, the side tangent line of the multiple getter cover with
The angle a of horizontal plane is 45 ° -60 °；Thus, getter cover has certain angle, it is ensured that relatively large getter area, with reality
Now good getter effect, meanwhile, the angle of getter cover will not be excessive, it is ensured that the sponge iron above shaft furnace falls in getter cover
During outside, moved down by self gravitation, so as to not interfere with the smooth descending of the interior material of stove.
Filled the invention provides a kind of cooling gas system for shaft furnace cooling section, including cooling and dedusting device 11, pressure-raising
Put 12, air inlet switching valve group 16, carburizing device of air and furnace burdening temperature measurement device 14.According to a particular embodiment of the invention, institute
State cooling and dedusting device to be connected with the plug for outlet, for the gas of the cooling gas getter pipeline discharge to be carried out into cooling dedusting
Processing；The pressure-raising device is connected with the cooling and dedusting device, and the gas for the cooling and dedusting device to be discharged is carried out
Pressure-raising processing；The air intake of air inlet switching valve group respectively with the gas outlet of the pressure-raising device and the carburizing device of air
Gas outlet is connected, the gas outlet of air inlet switching valve group with it is described enter fire door be connected, for according to cooling section discharge material
Temperature is transported in the cooling gas air inlet pipeline to control cooling gas and carburetted gas to switch so that before material cooling is ensured
Put, realize that the control of carburetted gas is added, improve the phosphorus content in discharge material；The furnace burdening temperature measurement device is arranged on institute
The lower section of cooling gas air inlet pipeline is stated, for monitoring the temperature of charge after cooling section cooling treatment in real time.Thus, the cooling
Gas system is monitored and air inlet converting system by furnace bottom material temperature, on the premise of the cooling of sponge iron product is ensured, realizes carburetted gas
Control add, effectively improve the phosphorus content in product sponge iron, improve product quality.
According to a particular embodiment of the invention, the cooling gas system also includes air intake control system 15.It is described enter gas control
System processed switches valve group with the air inlet respectively and the furnace burdening temperature measurement device is connected, and is filled according to the furnace burdening temperature measurement
Temperature of charge in the stove of monitoring is put, the air inlet switching valve group is automatically controlled and source of the gas is switched over to cooling gas and carburetted gas.
According to a particular embodiment of the invention, the furnace burdening temperature measurement device is single-point or multipoint thermocouple thermometric, is incited somebody to action
Temperature value feeds back to the air intake control system.Further, the furnace burdening temperature measurement device is surveyed using thermoelectricity is occasionally other
Trial assembly, which is put, realizes that furnace bottom material temperature is determined, and the result of measure is transferred in the air intake control system, when temperature reaches setting value
During condition, air intake control system control air inlet switching valve group is cooled down or carburizing gas conveying operations, realize cool down or
Carburization.
The invention provides a kind of cooling gas system for shaft furnace cooling section, the inner chamber of the shaft furnace vertically from
Preheating section 17, reduction section 18 and cooling section 19 are followed successively by under above, the also Primordial Qi entrance 3 of the shaft furnace is arranged on the shaft furnace also
On the side wall of former section, the outlet valve 13 of the shaft furnace is arranged on the bottom wall of the shaft furnace, the iron-bearing mineral entrance 1 of the shaft furnace
On the roof for being arranged on the shaft furnace, the top gas outlet 2 of the shaft furnace is arranged on the roof of the shaft furnace.According to the present invention
Specific embodiment, the cooling gas air inlet pipeline is horizontally placed on the bottom of shaft furnace cooling section, the cooling gas getter pipeline
It is horizontally placed on the top of shaft furnace cooling section, it is ensured that the entrance and recovery of the cooling gas in shaft furnace cooling section.Further, it is described
Cooling gas air inlet pipeline is horizontally placed on the bottom of shaft furnace cooling section, above outlet valve, the bottom point of the air inlet endless tube
The multiple air inlet that Open Side Down is furnished with, moreover, the cooling gas getter pipeline is horizontally placed on the top of shaft furnace cooling section
Portion, less than the also Primordial Qi entrance of shaft furnace, the bottom of the getter endless tube is provided with the multiple getter mouthful that Open Side Down, each
The upper end of the getter mouthful is connected with the getter endless tube, the lower ending opening of the getter mouthful and getter mouth outer end is welded with cone
The getter cover of shape.Thus, using rational cooling gas air inlet pipeline and getter pipeline system design, shaft furnace cooling section is improved
Gas collecting effect is cooled down after cooling down gas air inlet distribution and heat exchange, meanwhile, each spot temperature in equalizing furnace, reduce same level face in stove
The too high situation of local temperature, optimizes shaft furnace cooling section sponge iron cooling effect；Meanwhile, air inlet pipeline and getter pipeline of the present invention
System design does not influence the smooth descending of furnace charge, and many mouthfuls of air inlets of air inlet endless tube ensure that shaft furnace cooling section cools down gas air inlet uniformity
Property, many mouthfuls of getters of getter endless tube realize cooling gas and reclaim more efficient, also, the upper directly welding getter cover of getter mouthful, are increasing
Obvious obstruction will not be produced while dip getting effect to the direct motion of sponge iron product, while pipeline is simple to manufacture, is easy to implement.It is excellent
Choosing, the quantity of the multiple getter mouthful of the cooling gas system is identical with the quantity of the multiple air inlet, the multiple to receive
Gas port is located at the top of the multiple air inlet, can there is certain position deviation during installation；Because there is certain pressure in stove,
Cool down gas diffusion very fast, cooling gas can progressively spread from cooling gas during pars infrasegmentalis rises to top is cooled down, so, it is described many
Individual getter mouthful and the multiple air inlet do not need upper and lower opening strict just to position when mounted.
According to another aspect of the present invention, above-mentioned cooling gas system progress cooling gas is utilized present invention also offers a kind of
The method of processing, comprises the following steps：
（1）Shaft furnace top loads solid ferruginous mineral lump ore or pellet as raw material, is moved from top to bottom in shaft furnace, through perpendicular
Stove reduction section is reduced after gas fully reduces, and is obtained sponge iron, is continued traveling downwardly to cooling section.
According to a particular embodiment of the invention, the inner chamber of the shaft furnace be vertically followed successively by from top to bottom preheating section,
Reduction section and cooling section, the also Primordial Qi entrance of the shaft furnace is arranged on the side wall of reduction shaft furnace section, and the shaft furnace goes out
Material valve is arranged on the bottom wall of the shaft furnace.Thermal reduction gas are transported to going back for the shaft furnace via the also Primordial Qi entrance of the shaft furnace
In former section, and move upwards, the solid ferruginous mineral lump ore or pellet entered with shaft furnace top carries out reduction reaction.
According to a particular embodiment of the invention, the cooling gas of the air inlet endless tube is passed through not occur chemistry with iron-bearing mineral
The inert gas of reaction；The carburetted gas that the carburizing device of air is produced is the mixing of carbon dioxide, carbon monoxide and methane gas
Gaseous mixture of the gas either also containing part nitrogen or hydrogen.Further, cooling gas can use nitrogen, carbon dioxide gas or
Person is other with the nonreactive inert gas of iron mineral；Carburetted gas using carbon dioxide, the gaseous mixture of carbon monoxide and methane or
It is the gaseous mixture also containing part nitrogen or hydrogen, wherein, methane volume ratio in gaseous mixture is not higher than in 15%, gaseous mixture
Methane and carbon monoxide play carburization during shaft furnace cooling section sponge iron is cooled down to furnace charge.
（2）The sponge iron is continued traveling downwardly to shaft furnace cooling section, and the cooled gas air inlet pipeline of raw material after carrying out reduction is passed through
Cooling gas carry out cooling treatment, the sponge iron cooled down, via shaft furnace outlet valve discharge.
According to a particular embodiment of the invention, in step（2）In, during cooling gas continuous firing, furnace bottom material temperature is surveyed
Temperature of the device monitoring shaft furnace furnace charge after cooling treatment is measured, and temperature value is fed back into the air intake control system, works as temperature
When value reaches 90 DEG C, air intake control system stops the cooling gas air inlet that the air inlet switches valve group, switches to carburetted gas air inlet, together
When stop pressure-raising device work so that be only passed through carburetted gas in the cooling gas air inlet pipeline, carburetted gas not via
Arranged outside the cooling gas getter pipeline, but directly rise to the reduction reaction that reduction shaft furnace section participates in raw material, to shaft furnace bottom
Sponge iron play carburization, improve the phosphorus content in sponge iron；It is preferred that, the carburizing throughput is cooling gas flow
1/3-1/4, while this part carburetted gas is not arranged and directly rises to reduction section and participate in reduction of iron ore reaction outside；When temperature value is high
When setting value, air intake control system stops carburetted gas air inlet, switches to the air inlet to switch the cooling gas air inlet of valve group, simultaneously
The pressure-raising device work is opened, sponge iron is cooled to 100-140 DEG C when discharging shaft furnace, so as to realize cooling gas to shaft furnace
The sponge iron of bottom carries out cooling treatment, prevents sponge iron to be again be oxidized after coming out of the stove；It is preferred that, the setting value is 140 DEG C.
Further, the air intake control system is by way of computer-controlled program is controlled, according to the furnace burdening
Temperature of charge completes to automatically control the air inlet switching valve group to cooling gas and carburetted gas progress in the stove of temperature measurement device monitoring
Switch source of the gas.
According to a particular embodiment of the invention, the cooling gas system includes cooling gas air inlet pipeline, defeated for will cool down gas
In the cooling section for being sent to the shaft furnace.Further, the cooling gas air inlet pipeline is horizontally placed on the bottom of shaft furnace cooling section,
The cooling gas air inlet pipeline is located above outlet valve, for cooling gas to be transported into the cooling section hypomere of the shaft furnace, juxtaposition
In the top of outlet valve, with ensure to cool down gas the material in the shaft furnace is carried out fully, thoroughly cooling treatment.According to this
The specific embodiment of invention, the cooling gas air inlet pipeline includes air inlet endless tube and multiple air inlets；Wherein, the air inlet endless tube
Enter fire door with the cooling gas of the shaft furnace to be connected, for will cooling gas via the cooling gas of the shaft furnace enter fire door be transported to it is described
In air inlet endless tube；The multiple air inlet is distributed in the bottom of the air inlet endless tube, for by the cooling in the air inlet endless tube
Gas at the multiple air inlet via being discharged into the cooling section of the shaft furnace.Further, the multiple air inlet is located at institute
State the bottom of shaft furnace cooling section, and above outlet valve, for by cool down gas and be transported to the shaft furnace cooling section hypomere,
Be placed in the top of outlet valve, with ensure to cool down gas the material in the shaft furnace is carried out fully, thoroughly cooling treatment.It is excellent
Choosing, Open Side Down for the multiple air inlet, is ensureing that cool down gas is discharged into the shaft furnace via the multiple air inlet
Cooling section on the premise of, it is to avoid material in the shaft furnace, which enters, causes the cooling gas air inlet pipe in the multiple air inlet
The blocking on road, and the smooth descending of material is not influenceed, meanwhile, air inlet pipeline ensure that using the set-up mode of multiple air inlets
Air inlet it is uniform.
According to a particular embodiment of the invention, the quantity of the multiple air inlet and the multiple getter mouthful and the multiple
The quantity of getter cover is identical；The multiple air inlet is evenly distributed on the bottom of the air inlet endless tube；The air inlet endless tube is
360 ° of circular endless tube.It is preferred that, the quantity of the multiple air inlet is 6-12；The each two air inlet of the multiple air inlet
Mouthful spacing be 60 ° -30 °, i.e. due to 360 ° of endless tube circumference, so according to air inlet quantity, two air inlets are in air inlet endless tube
Spacing on circumference is 60 ° -30 °；Therefore, the present invention arranges suitable air inlet number by the external diameter according to air inlet endless tube
Amount, it is ensured that cooling gas even into；Also, pipeline is simple to manufacture, it is easy to implement.Thus, air inlet pipeline of the present invention
Endless tube size and getter pipeline endless tube size are designed according to the cooling section internal diameter of the shaft furnace, air inlet pipeline internal diameter and getter
Tubing internal diameter is according to cooling tolerance design, and target is to realize to make the sea by the shaft furnace cooling section under conditions of minimum tolerance
Continuous iron can be cool below 100-140 DEG C before discharging, prevent sponge iron to be again be oxidized after coming out of the stove.
（3）The cooling gas is up, and cooling gas getter pipeline is entered after being collected via multiple getter covers, is arranged via plug for outlet
Go out shaft furnace, pass sequentially through the cooling and dedusting device and carry out cooling dust removal process, enter at the pressure-raising device progress pressure-raising
Reason, switches the bottom that valve group, the cooling gas air inlet pipeline are passed into shaft furnace cooling section, to shaft furnace cooling section via air inlet again
Material carry out cooling treatment.
According to a particular embodiment of the invention, the cooling gas system includes cooling and dedusting device, pressure-raising device, air inlet switching
Valve group, carburizing device of air, air intake control system and furnace burdening temperature measurement device.The cooling and dedusting device connects with the plug for outlet
Connect, for the gas of the cooling gas getter pipeline discharge to be carried out into cooling dust removal process；The pressure-raising device and the cooling
Dust arrester is connected, and the gas for the cooling and dedusting device to be discharged carries out pressure-raising processing；The air inlet switching valve group
Air intake is connected with the gas outlet of the pressure-raising device and the gas outlet of the carburizing device of air respectively, and the air inlet switches valve group
Gas outlet with it is described enter fire door be connected, for according to cooling section discharge material temperature come control cooling gas and carburetted gas switch
It is transported in the cooling gas air inlet pipeline so that on the premise of material cooling is ensured, realizes that the control of carburetted gas is added, change
Phosphorus content in kind discharge material；The furnace burdening temperature measurement device is arranged on the lower section of the cooling gas air inlet pipeline, is used for
The temperature of charge after cooling section cooling treatment is monitored in real time；The air intake control system, respectively with the air inlet switching valve
Temperature of charge in group and furnace burdening temperature measurement device connection, the stove monitored according to the furnace burdening temperature measurement device, automatically
The air inlet switching valve group is controlled to switch over source of the gas to cooling gas and carburetted gas.Further, the cooling and dedusting device can
Think water scrubber；Thus, the purpose of design of water scrubber of the present invention be the cooling gas after recovery is cooled, dedusting；It is specific and
Speech, the cooling temperature degree after water scrubber washing should be less than 40 DEG C.Further, the furnace burdening temperature measurement device is
Single-point or multipoint thermocouple thermometric, the air intake control system is fed back to by temperature value.The furnace burdening temperature measurement device is used
The occasionally other test devices of thermoelectricity realize that furnace bottom material temperature is determined, and the result of measure is transferred in the air intake control system, when
When temperature reaches setting value condition, the air intake control system control air inlet switching valve group is cooled down or carburizing gas conveying behaviour
Make, realize cooling or carburization.
According to a particular embodiment of the invention, the cooling gas system includes cooling gas getter pipeline, the cooling gas getter
Pipeline is horizontally placed on the top of shaft furnace cooling section, less than also the Primordial Qi entrance, the cooling section for absorbing the shaft furnace of shaft furnace
Cooling gas after middle carry out cooling treatment, being heated by material, and discharge it the shaft furnace.The cooling gas getter pipeline bag
Getter endless tube, multiple getters mouth and multiple getter covers are included, wherein, the cooling gas plug for outlet phase of the getter endless tube and the shaft furnace
Connection, for the cooling gas of the getter endless tube to be discharged into the shaft furnace via the cooling gas plug for outlet of the shaft furnace；It is described to receive
The bottom of compression ring pipe is provided with the multiple getter mouthful, for will carry out after cooling treatment, quilt in the cooling section of the shaft furnace
The cooling gas of material heating is recovered in the getter endless tube via getter mouthful.Further, the opening of the multiple getter mouthful
Downwards, the upper end of each getter mouthful is connected with the getter endless tube, outside the lower ending opening and getter mouthful of the getter mouthful
Hold the getter cover that taper is fixed with by the way of welding；Also, the multiple getter mouthful of the cooling gas system is located at
The top of the multiple air inlet, can there is certain position deviation during installation.Thus, the present invention is evenly arranged many using endless tube
Individual air inlet and multiple getters mouthful, while getter mouthful is fixed with getter cover, it is ensured that shaft furnace cooling section cools down gas intake uniformity,
And cool down gas reclaim it is more efficient, so reduce cooling gas do not reclaimed effectively and rise to reduction shaft furnace section to reduce it is anti-
The adverse effect that should be brought；The present invention is ensureing that increase has by the way that cooling compression ring pipe getter cover is directly welded on getter mouthful
To the top-down effect very little of furnace charge while effect getter area, obvious delay effect will not be produced to sponge iron, it can be ensured that
The sponge iron of cooling procedure is smoothly descending；Moreover, getter pipeline and getter cover make simple, it is easy to implement.
According to a particular embodiment of the invention, the quantity of the multiple getter mouthful and the multiple getter cover with it is the multiple
The quantity of air inlet is identical；The multiple getter mouth is evenly distributed on the bottom of the getter endless tube；The getter endless tube is
360 ° of circular endless tube.It is preferred that, the quantity of the multiple getter mouthful and the multiple getter cover is 6-12；Each two is received
The spacing of gas port is 60 ° -30 °, and the spacing of each two getter cover is 60 ° -30 °, i.e. due to 360 ° of endless tube circumference, so foundation
The quantity of getter mouthful, spacing of two getters mouthful on getter endless tube circumference is 60 ° -30 °；Therefore, the present invention passes through according to receipts
The external diameter of compression ring pipe arranges suitable getter mouthful quantity, it is ensured that the uniform recovery of cooling gas, pipeline is simple to manufacture, and is easy to reality
It is existing.It is preferred that, the side tangent line of the multiple getter cover and the angle of horizontal plane are 45 ° -60 °；Thus, getter cover has certain
Angle, it is ensured that relatively large getter area, to realize good getter effect, meanwhile, the angle of getter cover will not be excessive,
When can ensure that the sponge iron above shaft furnace is fallen outside getter cover, moved down by self gravitation, so as to not interfere with stove
Interior material it is smooth descending.
Inventor has found that the invention provides a kind of cooling gas system for shaft furnace cooling section, cooling gas system profit
With rational cooling gas air inlet pipeline and getter pipeline system design, improve after the cooling gas air inlet distribution of shaft furnace cooling section and heat exchange
Cool down each spot temperature in gas collecting effect, equalizing furnace, reduce local temperature too high situation in same level face in stove, optimize shaft furnace
Cooling section sponge iron cooling effect；In addition, the cooling gas system ensures that gas is reclaimed by cooling down gas getter mouthful, the design of getter cover
More efficiently, reduce the ratio that cooling gas is not risen to reduction shaft furnace section by effective collection, preferably ensure that reduction shaft furnace section is main
The progress of reaction；Meanwhile, the air inlet pipeline and getter pipeline system design that the present invention is used do not influence the smooth descending of furnace charge, enter
Tracheae ensure that the uniform of air inlet by the design of many mouthfuls of air inlets, moreover, getter mouthful is upper directly to weld getter cover, in enhancing getter
Obvious obstruction will not be produced while effect to the direct motion of sponge iron product, meanwhile, pipeline is simple to manufacture, and is easy to implement；In addition, should
Gas system is cooled down by the way of furnace bottom drop temperature monitoring system is set, passes through procedure auto-control, switching cooling gas system
Source of the gas, on the premise of cooling effect is ensured, realizes carburization, the composition of sponge iron product is optimized, effectively improved
Product quality.
Embodiment 1
Certain ferric oxide pellet direct-reduction experiment shaft furnace, furnace pressure 0.18MPa (G), its 1.5 meters of cooling section burner hearth internal diameter is cold
But section is high 2.5 meters.Cool down gas air inlet endless tube to be located above discharging upper valve at 0.3m, bore 15cm, air inlet 8；Getter ring
Pipe is located above air inlet endless tube at 1.1m, bore 15cm, getter mouthful 8, and getter cover, getter cover side are welded with getter mouthful
45 ° of tangent line and horizontal sextant angle, getter cover mouthful diameter 40cm.
Cooling air water washes 5 meters of tower height, 2 meters of internal diameter, and cooling gas is passed through in tower from tower bottom, and cooling water is passed through washing from top
Tower, cooling gas is by after convection current washing cooling dedusting, and from the outflow of tower top, water scrubber exports 35 DEG C of gas of cooling.Cooling after washing
Gas enters split-compressor, and pressure-raising to 0.2MPa (G) is delivered to shaft furnace and is re-used for sponge iron cooling in shaft furnace.Gas is cooled down from perpendicular
Furnace bottom sends into shaft furnace cooling section, and less than 90 DEG C, now, computer are cooled to before sponge iron can be discharged after stable operation
Temperature signal control air inlet switching valve group work is received, switchs to 0.2MPa (G) carburetted gas air inlet, its tolerance is the 1/ of cooling gas
3, carburetted gas is methane 12%, carbon dioxide 53%, carbon monoxide 25%, the gaseous mixture of nitrogen 10%, while pressure-raising device stops work
Make, carburetted gas directly rises to reduction section and participate in reduction reaction after cooling section cooling carburizing.When furnace bottom charge-temperature is higher than
At 140 DEG C, computer program controls air inlet to switch valve group work again, switchs to cool down gas air inlet, while opening compressor pressure-raising.
Obtained sponge iron product is produced compared to the sponge iron product that simple cooling air cooling is obtained by the system, wherein carbon content from
0.3% brings up to 1.1%, effectively improves product quality.
Embodiment 2
Certain ferric oxide pellet direct-reduction experiment shaft furnace, furnace pressure 0.18MPa (G), its 2 meters of cooling section burner hearth internal diameter, cooling
Section is high 3 meters.Cool down gas air inlet endless tube to be located above discharging upper valve at 0.3m, bore 20cm, air inlet 10；Getter endless tube position
Getter cover is welded with the 2.5m places above the air inlet endless tube, bore 20cm, getter mouthful 10, getter mouth, getter cover side is cut
60 ° of line and horizontal sextant angle, getter cover mouthful diameter 45cm.
Cooling air water washes 6 meters of tower height, 2 meters of internal diameter, and cooling gas is passed through in tower from tower bottom, and cooling water is passed through washing from top
Tower, cooling gas is by after convection current washing cooling dedusting, and from the outflow of tower top, water scrubber exports 40 DEG C of gas of cooling.Cooling after washing
Gas enters split-compressor, and pressure-raising to 0.2MPa (G) is delivered to shaft furnace and is re-used for sponge iron cooling in shaft furnace.Gas is cooled down from perpendicular
Furnace bottom sends into shaft furnace cooling section, and less than 90 DEG C, now, computer are cooled to before sponge iron can be discharged after stable operation
Temperature signal control air inlet switching valve group work is received, switchs to 0.2MPa (G) carburetted gas air inlet, its tolerance is the 1/ of cooling gas
4, carburetted gas is methane 15%, carbon dioxide 45%, carbon monoxide 26%, the gaseous mixture of nitrogen 14%, while pressure-raising device stops work
Make, carburetted gas directly rises to reduction section and participate in reduction reaction after cooling section cooling carburizing.When furnace bottom charge-temperature is higher than
At 140 DEG C, computer program controls air inlet to switch valve group work again, switchs to cool down gas air inlet, while opening compressor pressure-raising.
Obtained sponge iron product is produced compared to the sponge iron product that simple cooling air cooling is obtained by the system, wherein carbon content from
0.4% brings up to 1.0%, effectively improves product quality.
The present invention is described in detail above, used herein principle and embodiment of the embodiment to the application
It is set forth, the explanation of above example is only intended to help and understands the present processes and its core concept；Simultaneously for
Those of ordinary skill in the art, according to the thought of the application, have change in specific embodiments and applications
Place, in summary, this specification content should not be construed as the limitation to the application.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (10)
1. a kind of cooling gas system for shaft furnace cooling section, it is characterised in that including：Gas air inlet pipeline, cooling gas is cooled down to receive
Air pipe, cooling and dedusting device, pressure-raising device, air inlet switching valve group, carburizing device of air and furnace burdening temperature measurement device, wherein：
The cooling gas air inlet pipeline is horizontally placed on the bottom of shaft furnace cooling section, and it includes air inlet endless tube and multiple air inlets,
The bottom of the air inlet endless tube is distributed with the multiple air inlet, and the cooling gas of the air inlet endless tube and the shaft furnace enters fire door company
Connect；
The cooling gas getter pipeline is horizontally placed on the top of shaft furnace cooling section, it include getter endless tube, multiple getters mouth and
Multiple getter covers, the getter endless tube is connected with the cooling gas plug for outlet of the shaft furnace, and the bottom of the getter endless tube is set
There is the multiple getter mouthful, the upper end of each getter mouthful is connected with the getter endless tube, and the lower end of the getter mouthful is opened
Mouth and the getter cover for being fixed with taper；
The cooling and dedusting device is connected with the plug for outlet, for the gas of the cooling gas getter pipeline discharge to be dropped
Warm dust removal process；
The pressure-raising device is connected with the cooling and dedusting device, and the gas for the cooling and dedusting device to be discharged is carried
Pressure processing；
The air intake of air inlet switching valve group gas outlet respectively with the pressure-raising device and the outlet of the carburizing device of air
Mouthful connection, the gas outlet of air inlet switching valve group with it is described enter fire door be connected, for the temperature according to cooling section discharge material
To control cooling gas and carburetted gas switching to be transported in the cooling gas air inlet pipeline, the addition of carburetted gas is controlled；
The furnace burdening temperature measurement device is arranged on the lower section of the cooling gas air inlet pipeline, passes through cooling section for monitoring in real time
Temperature of charge after cooling treatment.
2. a kind of cooling gas system for shaft furnace cooling section as claimed in claim 1, it is characterised in that the multiple getter
The side tangent line of cover and the angle of horizontal plane are 45 ° -60 °.
3. a kind of cooling gas system for shaft furnace cooling section as claimed in claim 1, it is characterised in that the multiple air inlet
Mouth is identical with the quantity of the multiple getter mouthful and the multiple getter cover, is 6-12.
4. a kind of cooling gas system for shaft furnace cooling section as claimed in claim 1, it is characterised in that the cooling gas enters
Air pipe is located above outlet valve, and Open Side Down for the multiple air inlet；The cooling gas getter pipeline is gone back less than shaft furnace
Primordial Qi entrance, Open Side Down for the multiple getter mouthful.
5. a kind of cooling gas system for shaft furnace cooling section as claimed in claim 1, it is characterised in that be passed through the air inlet
The cooling gas of endless tube is the inert gas not chemically reacted with iron-bearing mineral, and the carburetted gas that the carburizing device of air is produced is
Gaseous mixture of the gaseous mixture of carbon dioxide, carbon monoxide and methane gas either also containing part nitrogen or hydrogen.
6. a kind of cooling gas system for shaft furnace cooling section as claimed in claim 1, it is characterised in that also include into gas control
System processed, the air intake control system switches valve group with the air inlet respectively and the furnace burdening temperature measurement device is connected, according to
Temperature of charge in the stove of the furnace burdening temperature measurement device monitoring, automatically controls the air inlet switching valve group to cooling gas and carburizing
Gas switches over source of the gas.
7. a kind of cooling gas system for shaft furnace cooling section as claimed in claim 6, it is characterised in that the furnace bottom material temperature
Measurement apparatus is single-point or multipoint thermocouple thermometric, and temperature value is fed back into the air intake control system.
8. a kind of cooling gas system for shaft furnace cooling section as claimed in claim 1, it is characterised in that the shaft furnace it is interior
Chamber is vertically followed successively by preheating section, reduction section and cooling section from top to bottom, and the also Primordial Qi entrance of the shaft furnace is arranged on institute
On the side wall for stating reduction shaft furnace section, the outlet valve of the shaft furnace is arranged on the bottom wall of the shaft furnace.
9. a kind of cooling gas system using any one of claim 1-8 carries out the method for cooling down gas disposal, its feature
It is, comprises the following steps：
（1）Shaft furnace top loads solid ferruginous mineral lump ore or pellet as raw material, is moved from top to bottom in shaft furnace, through perpendicular
Stove reduction section is reduced after gas fully reduces, and is obtained sponge iron, is continued traveling downwardly to cooling section；
（2）The sponge iron is continued traveling downwardly to shaft furnace cooling section, and it is cold that raw material after carrying out reduction is cooled that gas air inlet pipeline is passed through
But gas carries out cooling treatment, and the sponge iron cooled down is discharged via the outlet valve of shaft furnace；
（3）The cooling gas is up, and cooling gas getter pipeline is entered after being collected via multiple getter covers, is discharged via plug for outlet perpendicular
Stove, passes sequentially through the cooling and dedusting device and carries out cooling dust removal process, enters the pressure-raising device progress pressure-raising processing, then
It is secondary to switch the bottom that valve group, the cooling gas air inlet pipeline are passed into shaft furnace cooling section via air inlet, to the thing of shaft furnace cooling section
Material carries out cooling treatment.
10. it is used for the application method of the cooling gas system of shaft furnace cooling section as claimed in claim 9, it is characterised in that in step
Suddenly（2）In, during cooling gas continuous firing, furnace burdening temperature measurement device monitors temperature of the shaft furnace furnace charge after cooling treatment
Degree, and temperature value is fed back into the air intake control system, when temperature value reaches 90 DEG C, enter described in air intake control system stopping
Autogenous cutting changes the cooling gas air inlet of valve group, switches to carburetted gas air inlet, while stopping the pressure-raising device work, so that described
Carburetted gas is only passed through in cooling gas air inlet pipeline, carburetted gas directly rises not via row outside the cooling gas getter pipeline
The reduction reaction of raw material is participated in reduction shaft furnace section, carburization is played to the sponge iron of shaft furnace bottom, improved in sponge iron
Phosphorus content；When temperature value is higher than setting value, air intake control system stops carburetted gas air inlet, switches to the air inlet switching valve group
Cooling gas air inlet, while opening pressure-raising device work, sponge iron is cooled to 100-140 DEG C when discharging shaft furnace, from
And realize that cooling gas carries out cooling treatment to the sponge iron of shaft furnace bottom, prevents sponge iron to be again be oxidized after coming out of the stove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710523672.4A CN107058666A (en) | 2017-06-30 | 2017-06-30 | A kind of cooling gas system for shaft furnace cooling section |
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| CN201710523672.4A CN107058666A (en) | 2017-06-30 | 2017-06-30 | A kind of cooling gas system for shaft furnace cooling section |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107868668A (en) * | 2017-12-15 | 2018-04-03 | 中冶焦耐(大连)工程技术有限公司 | A shaft furnace gas supply device with an annular gas supply channel and a gas supply method |
| CN107906947A (en) * | 2017-12-15 | 2018-04-13 | 中冶焦耐(大连)工程技术有限公司 | Grid wall gas supply structure and gas supply method of a vertical waste heat recovery device |
| CN108016854A (en) * | 2017-12-01 | 2018-05-11 | 中冶焦耐(大连)工程技术有限公司 | Delivery method of reduced iron and carbon residue mixture |
-
2017
- 2017-06-30 CN CN201710523672.4A patent/CN107058666A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108016854A (en) * | 2017-12-01 | 2018-05-11 | 中冶焦耐(大连)工程技术有限公司 | Delivery method of reduced iron and carbon residue mixture |
| CN107868668A (en) * | 2017-12-15 | 2018-04-03 | 中冶焦耐(大连)工程技术有限公司 | A shaft furnace gas supply device with an annular gas supply channel and a gas supply method |
| CN107906947A (en) * | 2017-12-15 | 2018-04-13 | 中冶焦耐(大连)工程技术有限公司 | Grid wall gas supply structure and gas supply method of a vertical waste heat recovery device |
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