CN106636627A - Method for producing cement clinker and oxide pellets - Google Patents
Method for producing cement clinker and oxide pellets Download PDFInfo
- Publication number
- CN106636627A CN106636627A CN201611147566.2A CN201611147566A CN106636627A CN 106636627 A CN106636627 A CN 106636627A CN 201611147566 A CN201611147566 A CN 201611147566A CN 106636627 A CN106636627 A CN 106636627A
- Authority
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- Prior art keywords
- pellet
- pellets
- pelletizing
- clinker
- outer layer
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- 239000008188 pellet Substances 0.000 title claims abstract description 103
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 239000004568 cement Substances 0.000 title abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000005453 pelletization Methods 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 32
- 229910052742 iron Inorganic materials 0.000 claims abstract description 31
- 239000002994 raw material Substances 0.000 claims abstract description 30
- 235000019738 Limestone Nutrition 0.000 claims abstract description 26
- 239000006028 limestone Substances 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 13
- 239000011707 mineral Substances 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims description 44
- 239000011230 binding agent Substances 0.000 claims description 22
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 18
- 230000001590 oxidative effect Effects 0.000 claims description 16
- 239000002253 acid Substances 0.000 claims description 15
- 239000002893 slag Substances 0.000 claims description 15
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 claims description 12
- 238000006253 efflorescence Methods 0.000 claims description 12
- 239000010881 fly ash Substances 0.000 claims description 12
- 206010037844 rash Diseases 0.000 claims description 12
- 239000005864 Sulphur Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000003723 Smelting Methods 0.000 claims description 8
- 239000011162 core material Substances 0.000 claims description 7
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- 239000011593 sulfur Substances 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 229910000628 Ferrovanadium Inorganic materials 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 abstract description 6
- 238000010298 pulverizing process Methods 0.000 abstract description 6
- 238000000227 grinding Methods 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 abstract 2
- 230000001070 adhesive effect Effects 0.000 abstract 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 239000000446 fuel Substances 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 13
- 239000004744 fabric Substances 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 4
- 239000011028 pyrite Substances 0.000 description 4
- 229910052683 pyrite Inorganic materials 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000001354 calcination Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 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
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
-
- 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
- C22B1/02—Roasting processes
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Environmental & Geological Engineering (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for producing cement clinker and oxide pellets. The method comprises the following steps: (1) respectively crushing and grinding iron ores, iron-bearing minerals, limestone and adhesive, uniformly mixing according to a proportion to obtain an inner core raw material, mixing pulverized fuel ash and limestone according to a proportion, adding adhesive, and uniformly mixing to obtain an outer layer raw material of pellets; (2) pelletizing the inner core raw material to obtain pellet inner cores; (3) pelletizing by using the pellet inner core as female parent pellets and the outer layer raw material of pellets as a raw material to obtain compound pellets; (4) drying the compound pellets; (5) roasting the dried compound pellets in the air to obtain roasted pellets; (6) cooling the roasted pellets out of a furnace to pulverize the outer layer of the roasted pellets, namely pulverizing the outer layer to obtain cement clinker, and obtaining inner pellets as oxidized pellets; and (7) collecting the roasted cement clinker and oxidized pellet ore. The method can be used for simultaneously producing cement clinker and oxidized pellet ore, so that the production efficiency is improved, and energy conservation and emission reduction can be achieved.
Description
Technical field
The invention belongs to field of metallurgy, and in particular to a kind of method for producing clinker and oxide pellet.
Background technology
With China's economy and industrial expansion, the continuous rise of building trade, with national basis construction scale not
Disconnected increase, the continuous rising of required cement amount, efficiently the technology of production cement raw material also paid attention to by building industry.But water
Mud industry has that overall technology is backward, highly energy-consuming is poorly efficient, environmental cost, therefore manufacture of cement is in process aspect
Innovate and apply extremely urgent.Simultaneously cement is internal under the short period to grill thoroughly when single piece of type is fired.
On the other hand, in China, high iron ore deposit is poorer, and, also than relatively low, harmful element is more and sulfur-bearing for grade
Select index low Deng objectionable impurities height, mill.And the relatively low Iron Ore Powder of grade is also difficult to use in blast furnace process.
The content of the invention
For the problems referred to above, the present invention from assistant ingredients bilayer pelletizing pelletizing mode, while carry out clinker and
The firing of carbonaceous pelletizing, not only efficiently produces clinker, and produces preferable pellet, while saving energy consumption.
According to an aspect of the present invention, there is provided a kind of method for producing clinker and oxide pellet, including following step
Suddenly：
1) it is iron ore, iron-bearing mineral, lime stone, binding agent is broken respectively, levigate and mix in proportion, obtain in
Nuclear fuel material, is mixed and added into flyash and lime stone in proportion binding agent and is well mixed, obtains pelletizing outer layer raw material；
2) by step 1) in the core material that obtains deliver to the first balling disk (-sc) and carry out pelletizing, obtain composite pellet kernel；
3) with step 2) in the composite pellet kernel that obtains as mother bulb and with step 1) in the pelletizing outer layer raw material that obtains
Pelletizing is carried out in the second balling disk (-sc) for raw material, composite pellet is obtained；
4) by step 3) in the composite pellet that obtains be dried process；
5) by step 4) in dried composite pellet carry out oxidizing roasting, obtain agglomerates；
6) by step 5) in the agglomerates that obtain cooled down outside stove so that agglomerates outer layer occurs efflorescence, outer layer
Efflorescence obtains clinker, and internal pelletizing is acid pellet；And
7) clinker and the oxide pellet for burning till is collected.
According to one embodiment of present invention, wherein step 1) in each group distribution ratio of core material be 68～88 weight portions
Iron ore, the iron-bearing mineral of 10～30 weight portions, the binding agent of the lime stone of 20～25 weight portions and 2-6 weight portions.
According to one embodiment of present invention, iron ore is containing sulphur iron ore.
According to one embodiment of present invention, the mass percent containing sulphur in sulphur iron ore be 10～30%, preferably 15～
30%, can be from pyrite (sulfur content is 15～18%), troilite (sulfur content is 20～30%) etc..
According to one embodiment of present invention, iron-bearing mineral is iron content poor quality mineral, and iron content poor quality mineral include Copper making
One or more in slag, nickel fibers slag, blast furnace ferrovanadium slag and other iron-containing tailings etc..
According to one embodiment of present invention, step 1) in pelletizing outer layer raw material flyash and lime stone it is final according to making
CaO/SiO in the clinker of generation2=2～2.4 ratio is mixed, and binding agent accounts for the quality of total outer layer raw material
Percentage is 4～8%.
According to one embodiment of present invention, wherein step 4) in composite pellet is dried process before first will be multiple
Close pelletizing to be sieved, and the pelletizing for meeting Particle size requirements after screening is dried into process by drying grate.
According to one embodiment of present invention, wherein step 5) in oxidizing roasting be at 1250～1400 DEG C calcining 28～
40 minutes, and agglomerates are cooled to into 1000 DEG C obtain agglomerates.
According to one embodiment of present invention, step 6) in cooling be by agglomerates be transported to insulation batch can in cool down
1～2 hour, and make the temperature of the material after cooling be maintained at 700～800 DEG C, afterwards powder and oxidation ball are made by vibratory sieve
Group separates.
According to a further aspect in the invention, there is provided a kind of rotary hearth furnace for producing clinker and pelletizing, the stove of the rotary hearth furnace
Body is in annular and the conveying direction along material is divided into cloth area, high-temperature region, middle warm area and discharge zone.
According to one embodiment of present invention, wherein high-temperature region temperature is maintained at 1250～1400 DEG C, and middle warm area temperature is protected
Hold at 1000 DEG C.
The method and rotary hearth furnace of present invention production clinker and oxide pellet can simultaneously produce clinker and oxygen
Two kinds of products of pellet ore deposit, improve production efficiency, energy-saving and emission-reduction.Solve cement simultaneously when single piece of type is fired, compared with
The internal problem that cannot be grilled thoroughly under short time.It is internal to complete Iron Ore Powder desulfurization and the roasting of pellet, and its product simultaneously
Metallurgical performance it is preferable.Pelletizing outer layer can save powder-grinding process from efflorescence, and this can not only save electric energy, and chemical pulverization is formed
Powder it is thinner than the powder that mechanical grinding is generated.
Description of the drawings
Fig. 1 is the indicative flowchart of the method for the production clinker and oxide pellet of the present invention；
Fig. 2 is the interior laminate layer schematic diagram of the composite pellet of one embodiment of the invention；And
Fig. 3 is the structural representation of the rotary hearth furnace of the production clinker and oxide pellet of the present invention.
Specific embodiment
It should be appreciated that embodiments of the invention shown in the exemplary embodiment are merely illustrative.Although at this
Only minority embodiment has been described in detail in bright, but those skilled in the art to be readily appreciated that and depart from the present invention in not essence
In the case of the teaching of theme, various modifications are feasible.Correspondingly, all such modifications should all be included in the present invention's
In the range of.Without departing from the spirit of the invention, can be to the design of following exemplary embodiment, operating condition and ginseng
Number etc. makes others and replaces, changes, changes and delete.
The indicative flowchart of the method for the production clinker and pelletizing of the embodiment of the present invention is described referring to Fig. 1.
As shown in figure 1, in the step s 100, iron ore, iron-bearing mineral, lime stone, binding agent are crushed respectively, it is levigate simultaneously
Mix in proportion, obtain core material.Simultaneously flyash and lime stone are mixed and added into in proportion binding agent mixing equal
It is even, obtain pelletizing outer layer raw material.The each group distribution ratio of wherein core material is the iron ore of 68～88 weight portions, 10～30 weight
The binding agent of the iron-stone, the lime stone of 20～25 weight portions and 2～6 weight portions of part.Iron ore is preferably with containing troilite
Stone, it is contemplated that produce the sulfur content in the efficiency and final iron product of heat, it is all inappropriate that sulfur content is too high or too low.
Mass percent containing sulphur in sulphur iron ore in the present invention is 10～30%, preferably 15～30%, and (sulphur contains can to select pyrite
Measure as 15～18%), troilite (sulfur content is 20～30%) etc..Iron-bearing mineral is iron content poor quality mineral, such as copper smelting slag, nickel
One or more in metallurgical slag, blast furnace ferrovanadium slag and other iron-containing tailings etc..The flyash and lime stone of pelletizing outer layer raw material
According to the CaO/SiO in the clinker for making to ultimately generate2=2～2.4 ratio is mixed, and binding agent accounts for total outer layer
The mass percent of raw material is 4～8%, and binding agent can add in the form of the amidin or in the form of dried starch.
In step s 200, the core material obtained in step S100 is delivered to into the first balling disk (-sc) carries out pelletizing, is answered
Pelletizing kernel is closed, the particle diameter of composite pellet kernel is preferably 9～14mm.
In step S300, the composite pellet kernel obtained with step S200 in step S100 as mother bulb and to obtain
Pelletizing outer layer raw material pelletizing is carried out in the second balling disk (-sc) for raw material, obtain composite pellet, composite pellet particle diameter is preferably 16
～20mm.Pelletizing interior laminate layer schematic diagram is as shown in Fig. 2 wherein internal shadow region represents composite pellet kernel, Exterior White
Region representation pelletizing outer layer.
In step S400, the composite pellet obtained in step S300 is dried into process, in this step, can be with profit
Process is dried to composite pellet with drying grate.
In step S500, dried composite pellet in step S400 is carried out into oxidizing roasting, obtain agglomerates.Its
In, dried composite pellet can be uniformly layered in the cloth area of rotary hearth furnace to carry out oxidizing roasting.In oxidizing roasting
During, composite pellet is calcined 28～40 minutes in rotary hearth furnace high-temperature region at 1250～1400 DEG C, is cooled in middle warm area
Discharge from the discharge zone of rotary hearth furnace after 1000 DEG C or so and obtain agglomerates.In roasting, each group of composite pellet kernel divides it
Between there is oxidation reaction, generate acid pellet；Also it is heated outside pelletizing, meanwhile, it is oxidized removing containing the sulphur in sulphur iron ore
During produce heat, provides heat for pelletizing inside so that temperature spread inside and outside pelletizing reduces, improve and aoxidize ball
The uniformity of crystalline phase, improves its metallurgical performance in group.
In step S600, the agglomerates obtained in step 500 are cooled down outside stove so that agglomerates outer layer
Generation efflorescence, outer layer efflorescence obtains clinker, and internal pelletizing is acid pellet.Agglomerates can be transported to insulation batch can
After interior cooling 1～2 hour, 700～800 DEG C are gradually cooling to, and there is efflorescence in pelletizing outer layer in cooling procedure.
In step S700, it is possible to use vibratory sieve carries out the separation of powder and acid pellet, collect powder and obtain cement
Grog, internal oxidation pelletizing then can be directly as iron-smelting raw material.
In one particular embodiment of the present invention, can before process is dried to composite pellet in step S400
First to be sieved composite pellet, and the pelletizing for meeting Particle size requirements after screening is dried into process by drying grate.
The method of above-mentioned production clinker and oxide pellet can simultaneously produce clinker and oxide pellet two
Product is planted, production efficiency, energy-saving and emission-reduction are improve.Solve cement simultaneously when single piece of type is fired, it is interior under the short period
The problem that portion cannot grill thoroughly.It is internal to complete Iron Ore Powder desulfurization and the roasting of pellet, and the metallurgical performance of its product simultaneously
Preferably.Pelletizing outer layer can save powder-grinding process from efflorescence, and this can not only save electric energy, and the powder that chemical pulverization is formed compares machine
The powder that tool grinding is generated is thinner.
With reference to Fig. 3, Fig. 3 shows the schematic diagram of the rotary hearth furnace of the production clinker and oxide pellet of the present invention.Its
In, the body of heater of the rotary hearth furnace is in annular and the conveying direction along material is divided into cloth area 100, high-temperature region 200, middle temperature
Area 300 and discharge zone 400.Wherein, the temperature of high-temperature region 200 is maintained at 1250～1400 DEG C, and the temperature of middle warm area 300 is maintained at 1000
DEG C or so.When using the rotary hearth furnace production clinker and oxide pellet, the composite pellet for preparing uniformly is layered on and is turned
In the cloth area 100 of bottom stove, rotary hearth furnace rotates and composite pellet is delivered to into high-temperature region 200, calcines at 1250～1400 DEG C
28～40 minutes, discharge from the discharge zone 400 of rotary hearth furnace after middle warm area 300 is cooled to 1000 DEG C or so and obtain agglomerates.
Rotary kiln technology can be avoided for the pollution of environment using the rotary hearth furnace calcining cement clinker of the present invention.Combine further below
Specific embodiment is illustrating the present invention.
Embodiment one
Pyrite, copper smelting slag, lime stone, binding agent are distinguished into pulverizing and jevigating to about 0.075mm, 8% is accounted on sieve.It
Afterwards, the binding agent of the pyrite of 68 weight portions, the copper smelting slag of 30 weight portions, the lime stone of 20 weight portions and 6 weight portions is mixed
Close uniform, pelletizing kernel is made in the first balling disk (-sc), sieved by screening plant, granularity is carried out in 9～14mm or so
Subsequent processing, particle diameter is undesirable processed after continue as pelletizing raw material.By flyash and lime stone according to making life
The CaO/SiO contained in the clinker of product2=2 ratio carries out dispensing and addition accounts for total raw material percentage by weight for 4%
Binding agent, be well mixed.Flyash and lime stone compound and the pelletizing kernel for preparing are sent into into the by batcher
Two balling disk (-sc)s, the control water yield and disc rotation speed, make the composite pellet that diameter is about 16～20mm.Setting disk tilt angle degree, makes
Composite pellet is grown up to suitable particle size and leaves disk under the influence of centrifugal force.
Composite pellet is dried after process by drying grate, the cloth of rotary hearth furnace is uniformly layered on after composite pellet is dried
In material area 100, oxidizing roasting is carried out.Composite pellet is maintained at 1250 DEG C in high-temperature region 200 and calcines 40 minutes, through about
After 1000 DEG C of middle warm area 300, discharge in discharge zone 400.During oxidizing roasting, the sulphur in internal sulphur-containing substance is in height
Under warm oxidizing condition, there is oxidation sweetening reaction and produce heat, provide heat for pelletizing inside so that inside and outside pelletizing temperature spread
Reduce, improve the uniformity of crystalline phase in acid pellet, there is preferable metallurgical performance.Afterwards the acid pellet for obtaining is delivered to into guarantor
In warm batch can, insulation batch can above covering and heat insulating cotton cool down 1 hour after, be gradually cooling to 800 DEG C, and the ball in cooling procedure
There is efflorescence in group's outer layer, and by vibratory sieve the separation of powder and acid pellet is carried out, and collects powder and obtains clinker, internal oxygen
Pellet then can be directly as iron-smelting raw material.
Embodiment two
By troilite, nickel fibers slag, lime stone, the equal pulverizing and jevigating of binding agent to about 0.075mm, 10% is accounted on sieve.Afterwards,
The binding agent mixing of the troilite of 78 weight portions, the nickel fibers slag, the lime stone of 23 weight portions and 4 weight portions of 20 weight portions is equal
It is even, pelletizing kernel is made in the first balling disk (-sc), to be sieved by screening plant, granularity is under the carrying out of 9～14mm or so
One operation, particle diameter is undesirable processed after continue as pelletizing raw material.By flyash and lime stone according to making production
Clinker in the CaO/SiO that contains2=2.2 ratio carries out dispensing and addition accounts for total raw material mass percent for 6%
Binding agent, be well mixed.Flyash and lime stone compound and the pelletizing kernel for preparing are sent into into the by batcher
Two balling disk (-sc)s, the control water yield and disc rotation speed, make the composite pellet that diameter is about 16～20mm.Setting disk tilt angle degree, makes
Composite pellet is grown up to suitable particle size and leaves disk under the influence of centrifugal force.
Composite pellet is dried after process by drying grate, the cloth of rotary hearth furnace is uniformly layered on after composite pellet is dried
In material area 100, oxidizing roasting is carried out.Composite pellet is maintained at 1350 DEG C in high-temperature region 200 and calcines 30 minutes, through about
After 1000 DEG C of middle warm area 300, discharge in discharge zone 400.During oxidizing roasting, the sulphur in internal sulphur-containing substance is in height
Under warm oxidizing condition, there is oxidation sweetening reaction and produce heat, provide heat for pelletizing inside so that inside and outside pelletizing temperature spread
Reduce, improve the uniformity of crystalline phase in acid pellet, there is preferable metallurgical performance.Afterwards the acid pellet for obtaining is delivered to into guarantor
In warm batch can, after covering and heat insulating cotton cools down 1.5 hours above the insulation batch can, 750 DEG C are gradually cooling to, and in cooling procedure
There is efflorescence in pelletizing outer layer, and by vibratory sieve the separation of powder and acid pellet is carried out, and collects powder and obtains clinker, internal
Acid pellet then can be directly as iron-smelting raw material.
Embodiment three
Troilite, blast furnace vanadium titanium slag, lime stone, binding agent distinguish pulverizing and jevigating to about 0.075mm, and 12% is accounted on sieve.It
Afterwards, by the troilite of 88 weight portions, the binding agent of the blast furnace vanadium titanium slag, the lime stone of 25 weight portions and 2 weight portions of 10 weight portions
It is well mixed, pelletizing kernel is made in the first balling disk (-sc), sieved by screening plant, granularity is 9～14mm's or so
Carry out subsequent processing, particle diameter is undesirable processed after continue as pelletizing raw material.By flyash and lime stone according to
The CaO/SiO contained in the clinker for making production2=2.4 ratio carries out dispensing and addition accounts for total raw material mass percent
For 8% binding agent, it is well mixed.Flyash and lime stone compound and the pelletizing kernel for preparing are sent by batcher
Enter the second balling disk (-sc), the control water yield and disc rotation speed, make the composite pellet that diameter is about 16～20mm.Setting disk tilt angle
Degree, makes composite pellet grow up to suitable particle size and leaves disk under the influence of centrifugal force.
Composite pellet is dried after process by drying grate, the cloth of rotary hearth furnace is uniformly layered on after composite pellet is dried
In material area 100, oxidizing roasting is carried out.Composite pellet is maintained at about 1400 DEG C in high-temperature region 200 and calcines 28 minutes, is passing through
After 1000 DEG C of middle warm area 300, discharge in discharge zone 400.During oxidizing roasting, the sulphur in internal sulphur-containing substance is in height
Under warm oxidizing condition, there is oxidation sweetening reaction and produce heat, provide heat for pelletizing inside so that inside and outside pelletizing temperature spread
Reduce, improve the uniformity of crystalline phase in acid pellet, there is preferable metallurgical performance.Afterwards the acid pellet for obtaining is delivered to into guarantor
In warm batch can, insulation batch can above covering and heat insulating cotton cool down 2 hours after, be gradually cooling to 700 DEG C, and the ball in cooling procedure
There is efflorescence in group's outer layer, and by vibratory sieve the separation of powder and acid pellet is carried out, and collects powder and obtains clinker, internal oxygen
Pellet then can be directly as iron-smelting raw material.
The foregoing is only presently preferred embodiments of the present invention, not for limit the present invention practical range；If do not taken off
From the spirit and scope of the present invention, the present invention is modified or equivalent, all should be covered in the claims in the present invention
In the middle of protection domain.
Claims (9)
1. a kind of method for producing clinker and oxide pellet, it is characterised in that comprise the following steps：
1) it is iron ore, iron-bearing mineral, lime stone, binding agent is broken respectively, levigate and mix in proportion, obtain kernel former
Material, is mixed and added into flyash and lime stone in proportion binding agent and is well mixed, obtains pelletizing outer layer raw material；
2) by step 1) in the core material that obtains deliver to the first balling disk (-sc) and carry out pelletizing, obtain composite pellet kernel；
3) with step 2) in the composite pellet kernel that obtains as mother bulb and with step 1) in the pelletizing outer layer raw material that obtains as former
Material carries out pelletizing in the second balling disk (-sc), obtains composite pellet；
4) by step 3) in the composite pellet that obtains be dried process；
5) by step 4) in dried composite pellet carry out oxidizing roasting, obtain agglomerates；
6) by step 5) in the agglomerates that obtain cooled down outside stove so that agglomerates outer layer occurs efflorescence, outer layer efflorescence
Clinker is obtained, internal pelletizing is acid pellet；And
7) clinker and the oxide pellet for burning till is collected.
2. the method for production clinker according to claim 1 and oxide pellet, it is characterised in that wherein step 1)
The each group distribution ratio of middle core material is the iron ore of 68～88 weight portions, the iron-bearing mineral of 10～30 weight portions, 20～25 weights
The lime stone of amount part and the binding agent of 2～6 weight portions.
3. it is according to claim 1 production clinker and oxide pellet method, it is characterised in that the iron ore
It is containing sulphur iron ore.
4. it is according to claim 3 production clinker and oxide pellet method, it is characterised in that the sulfur-bearing iron
The content of sulphur is 10～30% in ore.
5. it is according to claim 1 production clinker and oxide pellet method, it is characterised in that it is described containing iron ore
Thing is iron content poor quality mineral, and the mineral inferior include one or more in copper smelting slag, nickel fibers slag, blast furnace ferrovanadium slag.
6. it is according to claim 1 production clinker and oxide pellet method, it is characterised in that step 1) in ball
Flyash and lime stone are according to the CaO/SiO in the clinker for making to ultimately generate in group's outer layer raw material2=2～2.4 ratio
Mixed, and binding agent account for total outer layer raw material mass percent be 4～8%.
7. the method for production clinker according to claim 1 and oxide pellet, it is characterised in that wherein step 4)
In composite pellet is dried process before first composite pellet is sieved, and the ball of Particle size requirements will be met after screening
Group is dried process by drying grate.
8. the method for production clinker according to claim 1 and oxide pellet, it is characterised in that wherein step 5)
Middle oxidizing roasting is calcined 28～40 minutes at 1250～1400 DEG C, and is roasted after agglomerates are cooled to into 1000 DEG C
Burn pelletizing.
9. it is according to claim 1 production clinker and oxide pellet method, it is characterised in that step 6) in
Cooling is that agglomerates are transported in insulation batch can to cool down 1～2 hour, and makes the temperature of the material after cooling be maintained at 700
～800 DEG C.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108004396A (en) * | 2017-11-28 | 2018-05-08 | 酒泉钢铁(集团)有限责任公司 | Method for producing acidic oxidized pellet ore by using nickel slag |
| CN108165737A (en) * | 2017-12-26 | 2018-06-15 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of flyash binding agent and its preparation and application |
| CN109881000A (en) * | 2019-04-10 | 2019-06-14 | 华北理工大学 | A kind of double-layer composite pellet for treating copper slag and preparation method thereof |
| CN111153613A (en) * | 2020-01-16 | 2020-05-15 | 衢州华友钴新材料有限公司 | A method for preparing clinker by high-temperature roasting of cobalt hydrometallurgical waste residue with solid sulfur |
| CN116356160A (en) * | 2023-04-18 | 2023-06-30 | 马鞍山乌力平冶金技术工作室 | A kind of leaching method of vanadium in vanadium-containing iron ore powder |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108004396A (en) * | 2017-11-28 | 2018-05-08 | 酒泉钢铁(集团)有限责任公司 | Method for producing acidic oxidized pellet ore by using nickel slag |
| CN108004396B (en) * | 2017-11-28 | 2019-05-07 | 酒泉钢铁(集团)有限责任公司 | Method for producing acidic oxidized pellet ore by using nickel slag |
| CN108165737A (en) * | 2017-12-26 | 2018-06-15 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of flyash binding agent and its preparation and application |
| CN109881000A (en) * | 2019-04-10 | 2019-06-14 | 华北理工大学 | A kind of double-layer composite pellet for treating copper slag and preparation method thereof |
| CN109881000B (en) * | 2019-04-10 | 2021-06-01 | 华北理工大学 | Double-layer composite pellet for treating copper slag and preparation method thereof |
| CN111153613A (en) * | 2020-01-16 | 2020-05-15 | 衢州华友钴新材料有限公司 | A method for preparing clinker by high-temperature roasting of cobalt hydrometallurgical waste residue with solid sulfur |
| CN111153613B (en) * | 2020-01-16 | 2022-05-20 | 衢州华友钴新材料有限公司 | Method for preparing clinker by using cobalt hydrometallurgical waste residue for sulfur fixation and high-temperature roasting |
| CN116356160A (en) * | 2023-04-18 | 2023-06-30 | 马鞍山乌力平冶金技术工作室 | A kind of leaching method of vanadium in vanadium-containing iron ore powder |
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