CN106086402A - A kind of production method of ferrochrome - Google Patents
A kind of production method of ferrochrome Download PDFInfo
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- CN106086402A CN106086402A CN201610576851.XA CN201610576851A CN106086402A CN 106086402 A CN106086402 A CN 106086402A CN 201610576851 A CN201610576851 A CN 201610576851A CN 106086402 A CN106086402 A CN 106086402A
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- ferrochrome
- reducing agent
- fine ore
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- 229910000604 Ferrochrome Inorganic materials 0.000 title claims abstract description 85
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 38
- 239000011230 binding agent Substances 0.000 claims abstract description 24
- 235000019580 granularity Nutrition 0.000 claims abstract description 24
- 239000000567 combustion gas Substances 0.000 claims abstract description 22
- 239000008188 pellet Substances 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 14
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- 239000000440 bentonite Substances 0.000 claims description 18
- 229910000278 bentonite Inorganic materials 0.000 claims description 18
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 18
- 229920002472 Starch Polymers 0.000 claims description 17
- 239000008107 starch Substances 0.000 claims description 17
- 235000019698 starch Nutrition 0.000 claims description 17
- 238000011068 loading method Methods 0.000 claims description 11
- 239000000571 coke Substances 0.000 claims description 10
- 239000002817 coal dust Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 239000002737 fuel gas Substances 0.000 abstract description 3
- 238000005453 pelletization Methods 0.000 description 48
- 239000011651 chromium Substances 0.000 description 31
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 28
- 238000006722 reduction reaction Methods 0.000 description 28
- 230000009467 reduction Effects 0.000 description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 26
- 238000001465 metallisation Methods 0.000 description 25
- 229910052804 chromium Inorganic materials 0.000 description 21
- 230000004044 response Effects 0.000 description 20
- 239000000843 powder Substances 0.000 description 15
- 239000000243 solution Substances 0.000 description 14
- 238000003723 Smelting Methods 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- 238000000465 moulding Methods 0.000 description 12
- 239000002994 raw material Substances 0.000 description 12
- 239000003245 coal Substances 0.000 description 11
- 238000002156 mixing Methods 0.000 description 9
- 230000001172 regenerating effect Effects 0.000 description 9
- QDOXWKRWXJOMAK-UHFFFAOYSA-N chromium(III) oxide Inorganic materials O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 8
- 238000007599 discharging Methods 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 235000010755 mineral Nutrition 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 241001417490 Sillaginidae Species 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 235000000396 iron Nutrition 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000001603 reducing effect Effects 0.000 description 3
- 229910001021 Ferroalloy Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000007363 ring formation reaction Methods 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000002073 mitogenetic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/32—Obtaining chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/06—Alloys based on chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C35/00—Master alloys for iron or steel
- C22C35/005—Master alloys for iron or steel based on iron, e.g. ferro-alloys
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of method producing ferrochrome, comprise the following steps: ferrochrome fine ore and reducing agent are carried out ore grinding process respectively, granularity is levigate accounts for more than 70% to 200 mesh granularities；By the described ferrochrome fine ore after levigate, described reducing agent, binding agent mix homogeneously, it is shaped processing, it is thus achieved that agglomerate, described agglomerate is dried process, it is thus achieved that the agglomerate of dried；To the agglomerate of described dried in T1 temperature, reduce the t1 time, it is thus achieved that metallized pellet；Deliver to molten point of stove of combustion gas under the described metallized pellet condition of high temperature, carry out fusing in T2 temperature and separate, it is thus achieved that ferrochrome.The production method of the ferrochrome of the present invention uses ferrochrome fine ore and cheap reducing agent, effectively reduces production cost.Fusing separates the molten point of stove of combustion gas using fuel gas buring heat supply, and the electric furnace used compared to existing technology, molten point of stove efficient energy conversion of the combustion gas that the present invention uses is high, plays energy-saving effect.
Description
Technical field
The present invention relates to ferroalloy smelting field, specifically, relate to a kind of method producing ferrochrome.
Background technology
Ferrochrome can be divided into high-carbon, middle carbon, low-carbon (LC) and micro-carbon four class according to the difference of carbon content, mainly for the production of
Special alloy, smelting special steel, such as rustless steel, spring steel, tool steel etc., be widely used in aviation, aerospace, automobile, shipbuilding with
And the industrial circle such as national defence.
At present, the production of ferrochrome mainly uses eaf process, uses quality block chromite to send into ore deposit with addition of coke
Hot stove, smelts under the high temperature more than 1600 DEG C and obtains ferrochrome.This technique uses airtight or semi-hermetic mineral hot furnace to enter
Row is smelted, and seriously polluted, working environment is poor, and the melting electric consumption of unit product remains high in about 3200kWh, energy consumption.This
Outward, add after chromite powder and the breathability of furnace charge can be made to be deteriorated, produce not direct motion and technical specification degenerates, therefore cannot or very
Using cheap chromite powder less, production cost is the highest.
In order to reach the dual purpose that fine ore can be utilized to save energy and reduce the cost again, carry out around ferrochrome smelting technique and ground in a large number
Send out work.Wherein, Outokumpu method is that the most newly-built ferrochrome factory uses more a kind of technique, and this technique is first by chromium powder ore
Grinding, filtering means dehydration, fine ore filter cake and bentonite mixed pelletizing are re-fed into twin furnace shell and erect kiln roasting, finished product chrome ore bead and Jiao
Enter back into molten point of stove of closing submerged arc after sending the preheating in rotary kiln of molten point of stove furnace roof after charcoal, Silicon stone dispensing to smelt.Molten point of stove furnace roof
Rotary kiln only plays pre-heat effect, inconspicuous to the reducing effect of melting electric consumption.Rotary kiln reduction roasting method-mineral hot furnace method is also
A kind of representative technique, its technological process: first fine ore causes pelletizing, and the pelletizing after drying is directly entered rotary kiln
In, allocate a certain amount of coal particle into as reducing agent simultaneously.Spraying into coal dust or gas-fired at discharge end, general control is 1100
～in 1250 DEG C of temperature ranges, metallic iron and chromium are carried out prereduction.The pelletizing of reduction is then sent through in mineral hot furnace, and then obtains chromium
Iron product.Relatively conventional mineral hot furnace technique, rotary kiln not only Appropriate application chromite powder resource, also realize a certain degree of
Energy-saving effect, but this technique still suffers from many shortcomings: the easy ring formation of rotary kiln, causes and produces not direct motion；To raw material and reduction coal
Require strict；Pelletizing degree of metalization is low and easily pulverizes, and the deep reduction of pelletizing is mainly carried out in mineral hot furnace, and melting electric consumption is high；Single
Platform treating capacity is limited, and production capacity is on the low side.The problem exposed for current ferrochrome technique, the present invention proposes a kind of new
The method producing ferrochrome.
Prior art discloses a kind of technique for smelting ferrochrome using powdered Cr ore reductive sintered blocks, with powder chrome ore, acid
Property or silicates material, coke powder is raw material, use reduction sintering process make sintering chrome ore；It is former with this kind of sintering chrome ore
Material, with Silicon stone or limestone as flux, coke is that reducing agent carries out electric furnace smelting and produces ferrochrome.But this technology utilization
The chromite powder that price is relatively low, but reducing agent still uses the coke that price is higher；Use the side carrying out reducing in sintering process
Formula, oxidizing atmosphere is strong, and coke powder scaling loss is serious；Sintering deposit, flux add electric furnace together with coke and smelt the most at last, and pass
System technique difference is little, and energy-saving effect is undesirable.
Prior art also discloses a kind of powder chrome ore smelting chromium irons and the Processes and apparatus of chromium-containing molten iron.By powder
Chrome ore smelting chromium irons and the method for chromium-containing molten iron, will contain ferrochrome raw material and mix with reducing agent, flux, catalytic additive, system
Standby one-tenth micropowder, mixing causes pelletizing material, is sent in reduction furnace, after reduction reaction, obtains ferrochrome pelletizing, will be also
Pelletizing after former has been directly added in lining electroslag furnace smelts into ferrochrome or chromium-containing molten iron.But this raw materials technology is crushed to
After below 200 mesh, also need to carry out ball milling and make micropowder and Passivation Treatment, need during pelletizing dispensing additionally to add catalyst,
Molten timesharing need to add poisonous or expensive flux, all increases production cost；Reduction furnace reduction temperature is on the low side, 500 DEG C-1100 DEG C,
Recovery time is long.
Prior art also discloses a kind of method utilizing chromite powder two-step method melting and reducing to produce ferrochrome, will
Chromite powder and coke powder mix after on disc balling machine pelletizing, green pellets, after carrying out preheating and drying on drying grate, loads
Carrying out prereduction in rotary kiln, pre-reduced pellet hot charging enters iron liquid furnace and deeply reduces and melt mitogenetic product ferrochrome.But should
Method have the disadvantages that coke powder that 1. employing prices are higher as reducing agent, production cost is high；2. use rotary kiln as in advance
Reduction apparatus, pre-pelletizing degree of metalization is low, and is susceptible to ring formation phenomenon；3. the iron liquid furnace possessing deep reduction and molten point function depends on
By coal oxygen injection lance coal injection and oxygen combustion heat supply, owing to oxygen exists, the easy secondary oxidation of the liquid ferrochrome water capacity, reduce ferrum and
The response rate of chromium.
Summary of the invention
It is an object of the invention to provide the production method of a kind of ferrochrome, solve traditional chromium ferroalloy smelting technique without
Method utilizes the problem of ferrochrome fine ore, reduces production cost.
For reaching above-mentioned purpose, the invention discloses the production method of a kind of ferrochrome, comprise the following steps:
Ferrochrome fine ore and reducing agent are carried out ore grinding process respectively, and granularity is levigate accounts for more than 70% to 200 mesh granularities；
By the described ferrochrome fine ore after levigate, described reducing agent, binding agent mix homogeneously, it is shaped processing, it is thus achieved that group
Block, is dried process to described agglomerate, it is thus achieved that the agglomerate of dried；
To the agglomerate of described dried in T1 temperature, reduce the t1 time, it is thus achieved that metallized pellet；
Deliver to molten point of stove of combustion gas under the described metallized pellet condition of high temperature, carry out fusing in T2 temperature and separate, it is thus achieved that ferrochrome
Alloy.
Further, described ferrochrome fine ore 90～110 parts, described reducing agent 15～65 parts, described binding agent 2～20 parts；
Or
Described ferrochrome fine ore 90～110 parts, described reducing agent 15～65 parts, described binding agent 6～20 parts；Or
Described ferrochrome fine ore 90～110 parts, described reducing agent 15～65 parts, described binding agent 8～40 parts.
Further, described ferrochrome fine ore 100 parts, described reducing agent 22～55 parts, described binding agent 2～15 parts；Or
Described ferrochrome fine ore 100 parts, described reducing agent 22～55 parts, described binding agent 6～15 parts；Or
Described ferrochrome fine ore 100 parts, described reducing agent 22～55 parts, described binding agent 8～30 parts.
Further, one or more during described binding agent includes bentonite, starch solution；
Described ferrochrome fine ore 100 parts, described reducing agent 22～55 parts, described bentonite 2～15 parts；Or
Described ferrochrome fine ore 100 parts, described reducing agent 22～55 parts, described starch solution 6～15 parts；Or
Described ferrochrome fine ore 100 parts, described reducing agent 22～55 parts, described bentonite 2～15 parts, described starch solution 6
～15 parts.
Further, described reducing agent is fixed carbon content semi-coke more than 75% or coal dust.
Further, T1 temperature is 1400 DEG C～1550 DEG C.
Further, the t1 time is 30～60 minutes.
Further, at a temperature of metallized pellet T3, hot lower loading is incubated batch can, delivers to the molten point stove of combustion gas and melts
Separate.
Further, T2 temperature is 1600 DEG C～1900 DEG C；T3 temperature is 900 DEG C～1100 DEG C.
Further, described agglomerate is spherical or block.
The production method of the ferrochrome of the present invention uses ferrochrome fine ore and cheap reducing agent, effectively reduces production
Cost.Fusing separates the molten point of stove of combustion gas using fuel gas buring heat supply, and the electric furnace used compared to existing technology, the present invention uses
Molten point of stove efficient energy conversion of combustion gas is high, plays energy-saving effect.
Accompanying drawing explanation
Fig. 1 is the flow chart of the production method of the ferrochrome of this method embodiment.
Detailed description of the invention
Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, real with concrete below in conjunction with the accompanying drawings
The present invention is further detailed explanation to execute mode.Should be appreciated that specific embodiment described herein is only in order to explain
The present invention, is not intended to limit the present invention.The production method of the ferrochrome of the present invention, detailed description of the invention is as it is shown in figure 1, wrap
Include following steps:
S101, ferrochrome fine ore and reducing agent are carried out ore grinding process respectively, granularity is levigate to 200 mesh granularities account for 70% with
On；
S102, the described ferrochrome fine ore by after levigate, described reducing agent, binding agent mix homogeneously, be shaped processing, obtain
Obtain agglomerate, described agglomerate is dried process, it is thus achieved that the agglomerate of dried；
S103, to the agglomerate of described dried in T1 temperature, reduce the t1 time, it is thus achieved that metallized pellet；
Deliver to molten point of stove of combustion gas under S104, the described metallized pellet condition of high temperature, carry out fusing in T2 temperature and separate, it is thus achieved that
Ferrochrome.
Wherein, the production method of ferrochrome uses ferrochrome fine ore and cheap reducing agent, effectively reduces producing into
This.Fusing separates the molten point of stove of combustion gas using fuel gas buring heat supply, the electric furnace used compared to existing technology, the combustion that the present invention uses
Molten point of stove efficient energy conversion of gas is high, plays energy-saving effect.In S103, the agglomerate of described dried is carried out also in rotary hearth furnace
Former, the oxide of ferrum and chromium is gradually reduced the carbon reduction of agent, can obtain the metallized pellet of comprehensive degree of metalization more than 78%.
Described rotary hearth furnace is regenerative rotary hearth furnace, can improve heat utilization ratio, reduces energy resource consumption, and reduction temperature is high, and the recovery time is short,
Efficiency is high.
In S104, traditional handicraft many employings eaf process, owing to using block stock, the oxide of ferrum and chromium does not pass through
Prereduction, or use rotary kiln technology to carry out the pelletizing (degree of metalization is relatively low, less than 50%) of prereduction, enter electric furnace smelting
During ferrochrome, need to reduce the oxide of whole or most ferrum and chromium, cause smelting energy consumption to raise.The present invention's
Molten point of stove smelting chromium irons of combustion gas, uses comprehensive degree of metalization more than 78% metallized pellet after rotary hearth furnace reduction,
Molten timesharing only carries out the reduction of fraction, smelts energy consumption and is substantially reduced.Meanwhile, the electricity that electric furnace is used is transformed by coal, turns
Changing efficiency low, compared with the combustion gas identical heat of offer, the energy consumption of conversion is the highest.Use the producer of the ferrochrome of the present invention
Method, can reach the response rate of ferrum up to more than 89%, the response rate of the ferrochrome good index up to more than 90%.
In some illustrative embodiment, described ferrochrome fine ore 90～110 parts, described reducing agent 15～65 parts, described viscous
Knot agent 2～20 parts；Or
Described ferrochrome fine ore 90～110 parts, described reducing agent 15～65 parts, described binding agent 6～20 parts；Or
Described ferrochrome fine ore 90～110 parts, described reducing agent 15～65 parts, described binding agent 8～40 parts.
Preferably, described ferrochrome fine ore 100 parts, described reducing agent 22～55 parts, described binding agent 2～15 parts；Or it is described
Ferrochrome fine ore 100 parts, described reducing agent 22～55 parts, described binding agent 6～15 parts；Or described ferrochrome fine ore 100 parts, described also
Former dose 22～55 parts, described binding agent 8～30 parts.
The most preferably, one or more during described binding agent includes bentonite, starch solution；
Described ferrochrome fine ore 100 parts, described reducing agent 22～55 parts, described bentonite 2～15 parts；Or described ferrochrome fine ore
100 parts, described reducing agent 22～55 parts, described starch solution 6～15 parts；Or described ferrochrome fine ore 100 parts, described reducing agent 22
～55 parts, described bentonite 2～15 parts, described starch solution 6～15 parts.
Wherein, the ferrochrome fine ore of this method, reducing agent, bentonite and starch solution use above-mentioned specific proportioning, finally
The metallized pellet of comprehensive degree of metalization more than 78% can be obtained so that follow-up smelting energy consumption is substantially reduced.
In some illustrative embodiment, described reducing agent is fixed carbon content semi-coke more than 75% or coal dust.Institute
State semi-coke, coal dust cheap, save a large amount of production cost.
In some illustrative embodiment, T1 temperature is 1400 DEG C～1550 DEG C.
Wherein, when reduction temperature is less than 1400 DEG C, the iron oxides in chromite can quickly reduce, but chromated oxide also
Former more weak, the comprehensive degree of metalization of pelletizing is relatively low, extends the recovery time the most little on the impact of degree of metalization.Reduction temperature mistake
Height, can cause pelletizing soft heat, and easily material resistance to at the bottom of reduction furnace occurs bonding phenomenon, unfavorable to producing.
In some illustrative embodiment, the t1 time is 30～60 minutes.
In some illustrative embodiment, at a temperature of metallized pellet T3, hot lower loading is incubated batch can, delivers to combustion gas and melts
Divide stove to carry out fusing to separate.
In some illustrative embodiment, T2 temperature is 1600 DEG C～1900 DEG C；T3 temperature is 900 DEG C～1100 DEG C.
In some illustrative embodiment, described agglomerate is spherical or block.
Embodiment 1
Ferrochrome fine ore composition is: Cr2O3Content is 40.07%, and TFe content is 21.24%, levigate accounts for 200 mesh granularities
82%, take 100 parts；Semi-coke fixed carbon is 80.26%, levigate accounts for 88% to 200 mesh granularities, takes 35 parts；Take bentonite 5 parts, will
Above-mentioned raw materials carries out mixing and adding moisture, and rear employing disk carries out pelletizing molding, and the pelletizing after molding enters at 250 DEG C
Row is dried.Dried pelletizing is uniformly distributed in regenerative rotary hearth furnace, reduces 40 minutes, it is thus achieved that comprehensively metallize at 1500 DEG C
Rate is the degree of metalization pelletizing of 85.26%.Deliver to the molten point stove of combustion gas after hot lower loading batch can and carry out molten point, molten at 1750 DEG C
Discharging after dividing 1 hour, i.e. obtains ferrochrome, and Cr content is 49.41%, and C content is 6.33%, and the response rate of chromium reaches
92.10%, the response rate of ferrum reaches 90.57%.
Embodiment 2
Ferrochrome fine ore composition is: Cr2O3Content is 41.69%, and TFe content is 21.12%, levigate accounts for 200 mesh granularities
88%, take 100 parts；Semi-coke fixed carbon is 80.26%, levigate accounts for 83% to 200 mesh granularities, takes 29 parts；Take starch solution 10 parts,
Carrying out mixing and add suitable moisture by above-mentioned raw materials, rear employing disk carries out pelletizing molding, and the pelletizing after molding exists
It is dried at 250 DEG C.Dried pelletizing is uniformly distributed in regenerative rotary hearth furnace, reduces 35 minutes at 1530 DEG C, it is thus achieved that
Comprehensive degree of metalization is the degree of metalization pelletizing of 86.34%.Deliver to the molten point stove of combustion gas after hot lower loading batch can and carry out molten point,
At 1800 DEG C, molten point of discharging after 45 minutes, i.e. obtains ferrochrome, and Cr content is 51.62%, and C content is 6.47%, returning of chromium
Yield reaches 93.06%, and the response rate of ferrum reaches 91.21%.
Embodiment 3
Chromite powder composition is: Cr2O3Content is 41.69%, and TFe content is 21.12%, levigate accounts for 200 mesh granularities
86%, take 100 parts；Certain reduction coal fixed carbon is 76.53%, levigate accounts for 88% to 200 mesh granularities, takes 26 parts；Take bentonite 5
Part, taking starch solution 10 parts, carry out mixing and add suitable moisture by above-mentioned raw materials, rear employing disk carries out pelletizing one-tenth
Type, the pelletizing after molding is dried at 250 DEG C.Dried pelletizing is uniformly distributed in regenerative rotary hearth furnace, at 1400 DEG C
Lower reduction 45 minutes, it is thus achieved that comprehensive degree of metalization is the degree of metalization pelletizing of 78.19%.Combustion gas is delivered to after hot lower loading batch can
A molten point stove carries out molten point, and at 1700 DEG C, molten point of discharging after 1 hour, i.e. obtains ferrochrome, and Cr content is 50.27%, C content
Being 6.25%, the response rate of chromium reaches 90.39%, and the response rate of ferrum reaches 93.52%.
Embodiment 4
Chromite powder composition is: Cr2O3Content is 44.85%, and TFe content is 13.28%, levigate accounts for 200 mesh granularities
85%, take 100 parts；Certain reduction coal fixed carbon is 76.53%, levigate accounts for 88% to 200 mesh granularities, takes 32 parts；Take bentonite 5
Part, taking starch solution 10 parts, carry out mixing and add suitable moisture by above-mentioned raw materials, rear employing disk carries out pelletizing one-tenth
Type, the pelletizing after molding is dried at 250 DEG C.Dried pelletizing is uniformly distributed in regenerative rotary hearth furnace, at 1550 DEG C
Lower reduction 30 minutes, it is thus achieved that comprehensive degree of metalization is the degree of metalization pelletizing of 83.65%.Combustion gas is delivered to after hot lower loading batch can
A molten point stove carries out molten point, and at 1700 DEG C, molten point of discharging after 1 hour, i.e. obtains ferrochrome, and Cr content is 53.60%, C content
Being 6.57%, the response rate of chromium reaches 93.14%, and the response rate of ferrum reaches 93.42%.
Embodiment 5
Chromite powder composition is: Cr2O3Content is 44.85%, and TFe content is 13.28%, levigate accounts for 200 mesh granularities
85%, take 90 parts；Certain reduction coal fixed carbon is 76.53%, levigate accounts for 88% to 200 mesh granularities, takes 15 parts；Take bentonite 2 parts,
Taking starch solution 6 parts, carry out mixing and add suitable moisture by above-mentioned raw materials, rear employing disk carries out pelletizing molding,
Pelletizing after molding is dried at 250 DEG C.Dried pelletizing is uniformly distributed in regenerative rotary hearth furnace, at 1400 DEG C also
Former 30 minutes, it is thus achieved that comprehensive degree of metalization is the degree of metalization pelletizing of 72.53%.Molten point of combustion gas is delivered to after hot lower loading batch can
Stove carries out molten point, and at 1700 DEG C, molten point of discharging after 1 hour, i.e. obtains ferrochrome, and Cr content is 50.62%, and C content is
7.22%, the response rate of chromium reaches 89.23%, and the response rate of ferrum reaches 88.74%.
Embodiment 6
Chromite powder composition is: Cr2O3Content is 44.85%, and TFe content is 13.28%, levigate accounts for 200 mesh granularities
85%, take 110 parts；Certain reduction coal fixed carbon is 76.53%, levigate accounts for 88% to 200 mesh granularities, takes 66 parts；Take bentonite 15
Part, taking starch solution 15 parts, carry out mixing and add suitable moisture by above-mentioned raw materials, rear employing disk carries out pelletizing one-tenth
Type, the pelletizing after molding is dried at 250 DEG C.Dried pelletizing is uniformly distributed in regenerative rotary hearth furnace, at 1550 DEG C
Lower reduction 30 minutes, it is thus achieved that comprehensive degree of metalization is the degree of metalization pelletizing of 71.39%.Combustion gas is delivered to after hot lower loading batch can
A molten point stove carries out molten point, and at 1700 DEG C, molten point of discharging after 1 hour, i.e. obtains ferrochrome, and Cr content is 45.58%, C content
Being 8.89%, the response rate of chromium reaches 88.82%, and the response rate of ferrum reaches 87.69%.
Embodiment 7
Chromite powder composition is: Cr2O3Content is 44.85%, and TFe content is 13.28%, levigate accounts for 200 mesh granularities
85%, take 85 parts；Certain reduction coal fixed carbon is 76.53%, levigate accounts for 88% to 200 mesh granularities, takes 14 parts；Take bentonite 1 part,
Taking starch solution 5 parts, carry out mixing and add suitable moisture by above-mentioned raw materials, rear employing disk carries out pelletizing molding,
Pelletizing after molding is dried at 250 DEG C.Dried pelletizing is uniformly distributed in regenerative rotary hearth furnace, at 1400 DEG C also
Former 30 minutes, it is thus achieved that comprehensive degree of metalization is the degree of metalization pelletizing of 69.53%.Molten point of combustion gas is delivered to after hot lower loading batch can
Stove carries out molten point, and at 1700 DEG C, molten point of discharging after 1 hour, i.e. obtains ferrochrome, and Cr content is 40.02%, and C content is
8.22%, the response rate of chromium reaches 89.23%, and the response rate of ferrum reaches 88.74%.
Embodiment 8
Chromite powder composition is: Cr2O3Content is 44.85%, and TFe content is 13.28%, levigate accounts for 200 mesh granularities
85%, take 115 parts；Certain reduction coal fixed carbon is 76.53%, levigate accounts for 88% to 200 mesh granularities, takes 70 parts；Take bentonite 20
Part, taking starch solution 20 parts, carry out mixing and add suitable moisture by above-mentioned raw materials, rear employing disk carries out pelletizing one-tenth
Type, the pelletizing after molding is dried at 250 DEG C.Dried pelletizing is uniformly distributed in regenerative rotary hearth furnace, at 1600 DEG C
Lower reduction 30 minutes, it is thus achieved that comprehensive degree of metalization is the degree of metalization pelletizing of 68.31%.Combustion gas is delivered to after hot lower loading batch can
A molten point stove carries out molten point, and at 1700 DEG C, molten point of discharging after 1 hour, i.e. obtains ferrochrome, and Cr content is 41.25%, C content
Being 9.04%, the response rate of chromium reaches 88.72%, and the response rate of ferrum reaches 57.48%.
Be can be seen that by above-described embodiment 1-8, embodiment 3 is preferred embodiment, it is thus achieved that comprehensive degree of metalization is 78.19%
Degree of metalization pelletizing, it is thus achieved that ferrochrome, Cr content is 50.27%, and C content is 6.25%, and the response rate of chromium reaches
90.39%, the response rate of ferrum reaches 93.52%.
It should be noted that each embodiment above by reference to described by accompanying drawing is only in order to illustrate rather than restriction originally
The scope of invention, it will be understood by those within the art that, the most right
Amendment that the present invention is carried out or equivalent, all should contain within the scope of the present invention.Additionally, indication unless the context
Outward, the word occurred in the singular includes plural form, and vice versa.It addition, unless stated otherwise, then any embodiment
All or part of can use in conjunction with all or part of of any other embodiments.
Claims (10)
1. the production method of a ferrochrome, it is characterised in that comprise the following steps:
Ferrochrome fine ore and reducing agent are carried out ore grinding process respectively, and granularity is levigate accounts for more than 70% to 200 mesh granularities；
By the described ferrochrome fine ore after levigate, described reducing agent, binding agent mix homogeneously, it is shaped processing, it is thus achieved that agglomerate, right
Described agglomerate is dried process, it is thus achieved that the agglomerate of dried；
To the agglomerate of described dried in T1 temperature, reduce the t1 time, it is thus achieved that metallized pellet；
Deliver to molten point of stove of combustion gas under the described metallized pellet condition of high temperature, carry out fusing in T2 temperature and separate, it is thus achieved that ferrochrome.
Production method the most according to claim 1, it is characterised in that described ferrochrome fine ore 90～110 parts, described reducing agent
15～65 parts, described binding agent 2～20 parts；Or
Described ferrochrome fine ore 90～110 parts, described reducing agent 15～65 parts, described binding agent 6～20 parts；Or
Described ferrochrome fine ore 90～110 parts, described reducing agent 15～65 parts, described binding agent 8～40 parts.
Production method the most according to claim 2, it is characterised in that described ferrochrome fine ore 100 parts, described reducing agent 22～
55 parts, described binding agent 2～15 parts；Or
Described ferrochrome fine ore 100 parts, described reducing agent 22～55 parts, described binding agent 6～15 parts；Or described ferrochrome fine ore 100
Part, described reducing agent 22～55 parts, described binding agent 8～30 parts.
Production method the most according to claim 3, it is characterised in that described binding agent includes in bentonite, starch solution
One or more；
Described ferrochrome fine ore 100 parts, described reducing agent 22～55 parts, described bentonite 2～15 parts；Or described ferrochrome fine ore 100
Part, described reducing agent 22～55 parts, described starch solution 6～15 parts；Or
Described ferrochrome fine ore 100 parts, described reducing agent 22～55 parts, described bentonite 2～15 parts, described starch solution 6～15
Part.
Production method the most according to claim 1, it is characterised in that described reducing agent is that fixed carbon content is more than 75%
Semi-coke or coal dust.
Production method the most according to claim 1, it is characterised in that T1 temperature is 1400 DEG C～1550 DEG C.
Production method the most according to claim 1, it is characterised in that the t1 time is 30～60 minutes.
Production method the most according to claim 1, it is characterised in that at a temperature of metallized pellet T3, hot lower loading is incubated
Batch can, delivers to the molten point stove of combustion gas and carries out fusing separation.
Production method the most according to claim 8, it is characterised in that T2 temperature is 1600 DEG C～1900 DEG C；T3 temperature is
900 DEG C～1100 DEG C.
Production method the most according to claim 1, it is characterised in that described agglomerate is spherical or block.
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| CN106756138A (en) * | 2016-12-02 | 2017-05-31 | 陕西友力实业有限公司 | A kind of method that heating using microwave produces ferrochrome |
| CN107385206A (en) * | 2017-07-25 | 2017-11-24 | 中冶东方工程技术有限公司 | Ferrochrome raw material pretreatment process |
| EP3760748A1 (en) * | 2019-07-02 | 2021-01-06 | Brother Group (Hong Kong) Limited | Process for preparing optimized calcined, iron- and chrome-containing pellets |
| CN112251600A (en) * | 2019-07-22 | 2021-01-22 | 孙凌玉 | Preparation method and application of chromium metallization ball |
| CN112899426A (en) * | 2021-01-19 | 2021-06-04 | 乔柏人 | Process for producing ferrochromium alloy by using tunnel kiln |
| WO2024161378A1 (en) * | 2023-02-03 | 2024-08-08 | Sylvania South Africa (Pty) Ltd | A method for producing agglomerated pellets |
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| CN112899426A (en) * | 2021-01-19 | 2021-06-04 | 乔柏人 | Process for producing ferrochromium alloy by using tunnel kiln |
| CN112899426B (en) * | 2021-01-19 | 2022-03-25 | 乔柏人 | Process for producing ferrochromium alloy by using tunnel kiln |
| WO2024161378A1 (en) * | 2023-02-03 | 2024-08-08 | Sylvania South Africa (Pty) Ltd | A method for producing agglomerated pellets |
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