CN106636627B - A method of producing clinker and oxide pellet - Google Patents
A method of producing clinker and oxide pellet Download PDFInfo
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- CN106636627B CN106636627B CN201611147566.2A CN201611147566A CN106636627B CN 106636627 B CN106636627 B CN 106636627B CN 201611147566 A CN201611147566 A CN 201611147566A CN 106636627 B CN106636627 B CN 106636627B
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- 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
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- 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
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention discloses a kind of method producing clinker and oxide pellet, and this method includes：1) iron ore, iron-bearing mineral, lime stone, binder is broken respectively, levigate and mix in proportion, core material is obtained, flyash and lime stone are mixed and added into binder in proportion to be uniformly mixed, and pelletizing outer layer raw material is obtained；2) pelletizing is carried out to core material and obtains pelletizing kernel；3) pelletizing is carried out using pelletizing kernel as mother bulb and by raw material of pelletizing outer layer raw material, obtains composite pellet；4) processing is dried in composite pellet；5) composite pellet after drying is subjected to oxidizing roasting, obtains agglomerates；6) agglomerates are carried out outside stove cooling so that dusting occurs for agglomerates outer layer, outer layer dusting obtains clinker, and internal pelletizing is acid pellet；7) clinker and oxide pellet of firing are collected.This method can produce two kinds of products of clinker and oxide pellet simultaneously, improve production efficiency, energy-saving and emission-reduction.
Description
Technical field
The invention belongs to field of metallurgy, and in particular to a method of producing clinker and oxide pellet.
Background technology
With China's economy and industrial expansion, the continuous rise of building trade, not with national basis construction scale
Disconnected to increase, the continuous rising of required cement amount, the technology for efficiently producing cement raw material is also paid attention to by construction industry.But water
Mud industry there are overall technologies it is backward, highly energy-consuming is inefficient, environmental cost is serious the problems such as, therefore manufacture of cement is in process aspect
Innovation and application are extremely urgent.Cement is internal under the short period to grill thoroughly when single piece of type is fired simultaneously.
On the other hand, in China, high iron ore deposit is poorer, and grade is also relatively low, and harmful element is more and sulfur-bearing
Equal objectionable impurities are high, mill selects index low.And the lower Iron Ore Powder of grade is also difficult to use in blast furnace process.
Invention content
In view of the above-mentioned problems, the present invention select assistant ingredients bilayer pelletizing pelletizing mode, be carried out at the same time clinker and
The firing of carbonaceous pelletizing not only efficiently produces clinker, but also produces preferable pellet, while saving energy consumption.
According to an aspect of the present invention, a kind of method producing clinker and oxide pellet, including following step are provided
Suddenly：
1) iron ore, iron-bearing mineral, lime stone, binder is broken respectively, levigate and mix in proportion, obtain in
Flyash and lime stone are mixed and added into binder and are uniformly mixed, obtains pelletizing outer layer raw material by nuclear fuel material in proportion；
2) core material obtained in step 1) is sent to the first balling disk (-sc) and carries out pelletizing, obtain composite pellet kernel；
3) the pelletizing outer layer raw material using the composite pellet kernel obtained in step 2) as mother bulb and to be obtained in step 1)
Pelletizing is carried out in the second balling disk (-sc) for raw material, obtains composite pellet；
4) processing is dried in the composite pellet obtained in step 3)；
5) composite pellet after will be dry in step 4) carries out oxidizing roasting, obtains agglomerates；
6) agglomerates obtained in step 5) are carried out outside stove cooling so that dusting, outer layer occur for agglomerates outer layer
Dusting obtains clinker, and internal pelletizing is acid pellet；And
7) clinker and oxide pellet of firing are collected.
According to one embodiment of present invention, each group distribution ratio of core material is 68~88 parts by weight wherein in step 1)
Iron ore, the iron-bearing mineral of 10~30 parts by weight, the lime stone of 20~25 parts by weight and 2-6 parts by weight binder.
According to one embodiment of present invention, iron ore is containing sulphur iron ore.
According to one embodiment of present invention, mass percent containing sulphur in sulphur iron ore is 10~30%, preferably 15~
30%, pyrite (sulfur content is 15~18%), troilite (sulfur content is 20~30%) etc. can be selected.
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
It is 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, flyash and lime stone are final according to making in pelletizing outer layer raw material in step 1)
CaO/SiO in the clinker of generation2=2~2.4 ratio is mixed, and binder accounts for the quality of total outer layer raw material
Percentage is 4~8%.
According to one embodiment of present invention, it will first be answered before composite pellet being dried processing wherein in step 4)
It closes pelletizing to be sieved, and processing is dried by drying grate in the pelletizing for meeting Particle size requirements after screening.
According to one embodiment of present invention, wherein in step 5) oxidizing roasting be at 1250~1400 DEG C calcining 28~
40 minutes, and agglomerates are cooled to 1000 DEG C and obtain agglomerates.
According to one embodiment of present invention, the cooling in step 6) is that agglomerates are transported to cooling in heat preservation batch can
1~2 hour, and the temperature of material after cooling is made to be maintained at 700~800 DEG C, powder and oxidation ball are made by vibrating screen later
Group's separation.
According to another aspect of the present invention, a kind of rotary hearth furnace producing clinker and pelletizing, the stove of the rotary hearth furnace are provided
Body in circular ring shape and is divided into cloth area, high-temperature region, middle warm area and discharge zone along the conveying direction of material.
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
It holds at 1000 DEG C.
The present invention produces clinker and the method and rotary hearth furnace of oxide pellet can produce clinker and oxygen simultaneously
Two kinds of products of pellet mine, improve production efficiency, energy-saving and emission-reduction.Simultaneously solve cement when single piece of type is fired, compared with
Internal the problem of can not grilling thoroughly under short time.Inside is completed at the same time Iron Ore Powder desulfurization and the roasting of pellet, and its product
Metallurgical performance it is preferable.Pelletizing outer layer can save powder-grinding process from dusting, this can not only save electric energy, but also chemical pulverization is formed
Powder it is thinner than the powder that mechanical grinding generates.
Description of the drawings
Fig. 1 is the schematic flow chart of the production clinker of the present invention and the method for oxide pellet；
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 schematic diagram of the production clinker of the present invention and the rotary hearth furnace of oxide pellet.
Specific implementation mode
It should be appreciated that the embodiment of the present invention shown in the exemplary embodiment is merely illustrative.Although in this hair
Only a small number of embodiments are described in detail in bright, but those skilled in the art are readily appreciated that and are detached from the present invention in not essence
In the case of the introduction of theme, a variety of modifications are feasible.Correspondingly, all such modifications should all be included in the present invention's
In range.It, can be to the design, operating condition and ginseng of following exemplary embodiment without departing from the spirit of the invention
Number etc. makes others and replaces, changes, changes and delete.
The schematic flow chart 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, binder are crushed respectively, it is levigate simultaneously
It mixes in proportion, obtains core material.Flyash and lime stone binder is mixed and added into proportion simultaneously to mix
It is even, obtain pelletizing outer layer raw material.Wherein each group distribution ratio of core material is the iron ore of 68~88 parts by weight, 10~30 weight
The iron-stone, the lime stone of 20~25 parts by weight and the binder of 2~6 parts by weight of part.Iron ore is preferably with containing troilite
Stone, it is contemplated that generate the sulfur content in the efficiency and final iron product of heat, too high or too low sulfur content is all inappropriate.
Mass percent containing sulphur in sulphur iron ore in the present invention is 10~30%, preferably 15~30%, and can selecting pyrite, (sulphur contains
Amount is 15~18%), troilite (sulfur content is 20~30%) etc..Iron-bearing mineral is iron content poor quality mineral, such as copper smelting slag, nickel
It is 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 binder accounts for total outer layer
The mass percent of raw material is 4~8%, and binder can add in the form of amidin or in the form of dried starch.
In step s 200, the core material obtained in step S100 is sent to the first balling disk (-sc) and carries out pelletizing, answered
Pelletizing kernel is closed, the grain size of composite pellet kernel is preferably 9~14mm.
In step S300, using the composite pellet kernel obtained in step S200 as mother bulb and to be obtained in step S100
Pelletizing outer layer raw material be raw material pelletizing is carried out in the second balling disk (-sc), obtain composite pellet, composite pellet grain size is preferably 16
~20mm.Pelletizing interior laminate layer schematic diagram is as shown in Fig. 2, wherein internal shadow region indicates composite pellet kernel, Exterior White
Region indicates pelletizing outer layer.
In step S400, processing, in this step, Ke Yili is dried in the composite pellet obtained in step S300
Processing is dried to composite pellet with drying grate.
In step S500, the composite pellet in step S400 after drying is subjected to oxidizing roasting, obtains agglomerates.Its
In, the composite pellet after drying can be uniformly layered in the cloth area of rotary hearth furnace to carry out oxidizing roasting.In oxidizing roasting
In the process, 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
It is discharged to obtain agglomerates from the discharge zone of rotary hearth furnace after 1000 DEG C or so.In roasting, each group of composite pellet kernel divides it
Between occur oxidation reaction, generate acid pellet；It is also heated outside pelletizing, meanwhile, containing the sulphur in sulphur iron ore by oxidation removal
During generate heat, to provide heat inside pelletizing, so that the temperature spread inside and outside pelletizing reduces, improve oxidation ball
The uniformity of crystalline phase, improves its metallurgical performance in group.
In step S600, the agglomerates obtained in step 500 are subjected to cooling so that agglomerates outer layer outside stove
Dusting occurs, outer layer dusting obtains clinker, and internal pelletizing is acid pellet.Agglomerates can be transported to heat preservation batch can
After interior cooling 1~2 hour, 700~800 DEG C are gradually cooling to, and dusting occurs in pelletizing outer layer in cooling procedure.
In step S700, the separation of powder and acid pellet can be carried out using vibrating screen, collected powder and obtained cement
Clinker, internal oxidation pelletizing then can be directly as iron-smelting raw materials.
It in one particular embodiment of the present invention, can before composite pellet being dried processing in step S400
First to sieve composite pellet, and processing is dried by drying grate in the pelletizing for meeting Particle size requirements after screening.
The method of above-mentioned production clinker and oxide pellet can produce clinker and oxide pellet two simultaneously
Kind product, improves production efficiency, energy-saving and emission-reduction.Solve cement when single piece of type is fired simultaneously, it is interior under the short period
The problem of portion can not grill thoroughly.Inside is completed at the same time Iron Ore Powder desulfurization and the roasting of pellet, and the metallurgical performance of its product
Preferably.Pelletizing outer layer can save powder-grinding process from dusting, this can not only save electric energy, but also the powder that chemical pulverization is formed compares machine
The powder that tool grinding generates is thinner.
The schematic diagram of the production clinker of the present invention and the rotary hearth furnace of oxide pellet is shown with reference to Fig. 3, Fig. 3.Its
In, the furnace body of the rotary hearth furnace in circular ring shape and is divided into cloth area 100, high-temperature region 200, medium temperature along the conveying direction of material
Area 300 and discharge zone 400.Wherein, 200 temperature of high-temperature region is maintained at 1250~1400 DEG C, and 300 temperature of middle warm area is maintained at 1000
DEG C or so.When using rotary hearth furnace production clinker and oxide pellet, the composite pellet prepared is uniformly layered on and is turned
In the cloth area 100 of bottom stove, rotary hearth furnace rotates and composite pellet is delivered to high-temperature region 200, is calcined at 1250~1400 DEG C
It 28~40 minutes, is cooled to after 1000 DEG C or so the discharge of the discharge zone 400 from rotary hearth furnace in middle warm area 300 and obtains agglomerates.
Rotary hearth furnace calcining cement clinker using the present invention can be to avoid rotary kiln technology for environment pollution.It combines further below
Specific embodiment illustrates the present invention.
Embodiment one
Pyrite, copper smelting slag, lime stone, binder are distinguished into pulverizing and jevigating to about 0.075mm, 8% is accounted on sieve.It
Afterwards, the binder of the pyrite of 68 parts by weight, the copper smelting slag of 30 parts by weight, the lime stone of 20 parts by weight and 6 parts by weight is mixed
It closes uniformly, pelletizing kernel is made in the first balling disk (-sc), is sieved by screening plant, granularity is carried out in 9~14mm or so
Subsequent processing, grain size is undesirable handled after continue as pelletizing raw material.By flyash and lime stone according to making life
The CaO/SiO contained in the clinker of production2=2 ratio carries out dispensing and adds that account for total raw material weight percent be 4%
Binder, be uniformly mixed.Flyash and lime stone mixture and the pelletizing kernel prepared are sent into the by batcher
Two balling disk (-sc)s control water and disc rotation speed, the composite pellet that diameter is about 16~20mm are made.Disk tilt angle degree is set, is made
Composite pellet leaves disk under the influence of centrifugal force after growing up to suitable particle size.
After processing is dried to composite pellet by drying grate, the cloth of rotary hearth furnace is uniformly layered on after composite pellet is dried
Expect in area 100, carries out oxidizing roasting.Composite pellet is maintained at 1250 DEG C in high-temperature region 200 and calcines 40 minutes, by 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, oxidation sweetening reaction occurs and generates heat, to provide heat inside pelletizing so that inside and outside pelletizing temperature spread
Reduce, improves the uniformity of crystalline phase in acid pellet, there is preferable metallurgical performance.Obtained acid pellet is delivered to guarantor later
In warm batch can, heat preservation batch can above covering and heat insulating cotton cool down 1 hour after, be gradually cooling to 800 DEG C, and ball in cooling procedure
There is dusting in group's outer layer, and the separation of powder and acid pellet is carried out by vibrating screen, 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 binder to about 0.075mm, 10% is accounted on sieve.Later,
The binder of the troilite of 78 parts by weight, the nickel fibers slag of 20 parts by weight, the lime stone of 23 parts by weight and 4 parts by weight is mixed equal
It is even, pelletizing kernel is made in the first balling disk (-sc), is sieved by screening plant, granularity is under the progress of 9~14mm or so
One process, grain size is undesirable handled 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 adds that account for total raw material mass percent be 6%
Binder, be uniformly mixed.Flyash and lime stone mixture and the pelletizing kernel prepared are sent into the by batcher
Two balling disk (-sc)s control water and disc rotation speed, the composite pellet that diameter is about 16~20mm are made.Disk tilt angle degree is set, is made
Composite pellet leaves disk under the influence of centrifugal force after growing up to suitable particle size.
After processing is dried to composite pellet by drying grate, the cloth of rotary hearth furnace is uniformly layered on after composite pellet is dried
Expect in area 100, carries out oxidizing roasting.Composite pellet is maintained at 1350 DEG C in high-temperature region 200 and calcines 30 minutes, by 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, oxidation sweetening reaction occurs and generates heat, to provide heat inside pelletizing so that inside and outside pelletizing temperature spread
Reduce, improves the uniformity of crystalline phase in acid pellet, there is preferable metallurgical performance.Obtained acid pellet is delivered to guarantor later
In warm batch can, heat preservation batch can above covering and heat insulating cotton cool down 1.5 hours after, be gradually cooling to 750 DEG C, and in cooling procedure
There is dusting in pelletizing outer layer, and the separation of powder and acid pellet is carried out by vibrating screen, 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, binder distinguish pulverizing and jevigating to about 0.075mm, and 12% is accounted on sieve.It
Afterwards, by the troilite of 88 parts by weight, the blast furnace vanadium titanium slag of 10 parts by weight, 25 parts by weight lime stone and 2 parts by weight binder
It is uniformly mixed, pelletizing kernel is made in the first balling disk (-sc), is sieved by screening plant, granularity is 9~14mm's or so
Carry out subsequent processing, grain size is undesirable handled after continue as pelletizing raw material.By flyash and lime stone according to
Make the CaO/SiO contained in the clinker of production2=2.4 ratio carries out dispensing and adds to account for total raw material mass percent
For 8% binder, it is uniformly mixed.Flyash and lime stone mixture and the pelletizing kernel prepared are sent by batcher
Enter the second balling disk (-sc), controls water and disc rotation speed, the composite pellet that diameter is about 16~20mm is made.Set disk tilt angle
Degree, leaves disk under the influence of centrifugal force after so that composite pellet is grown up to suitable particle size.
After processing is dried to composite pellet by drying grate, the cloth of rotary hearth furnace is uniformly layered on after composite pellet is dried
Expect in area 100, carries out oxidizing roasting.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, oxidation sweetening reaction occurs and generates heat, to provide heat inside pelletizing so that inside and outside pelletizing temperature spread
Reduce, improves the uniformity of crystalline phase in acid pellet, there is preferable metallurgical performance.Obtained acid pellet is delivered to guarantor later
In warm batch can, heat preservation batch can above covering and heat insulating cotton cool down 2 hours after, be gradually cooling to 700 DEG C, and ball in cooling procedure
There is dusting in group's outer layer, and the separation of powder and acid pellet is carried out by vibrating screen, collects powder and obtains clinker, internal oxygen
Pellet then can be directly as iron-smelting raw material.
The foregoing is merely presently preferred embodiments of the present invention, practical range not for the purpose of limiting the invention；If do not taken off
It from the spirit and scope of the present invention, modifies or equivalently replaces the present invention, should all cover in the claims in the present invention
In protection domain.
Claims (9)
1. a kind of method producing clinker and oxide pellet, which is characterized in that include the following steps：
1) iron ore, iron-bearing mineral, lime stone, binder is broken respectively, levigate and mix in proportion, obtain kernel original
Material, is mixed and added into binder by flyash and lime stone and is uniformly mixed, obtain pelletizing outer layer raw material in proportion；
2) core material obtained in step 1) is sent to the first balling disk (-sc) and carries out pelletizing, obtain composite pellet kernel；
3) it is former using the composite pellet kernel obtained in step 2) as mother bulb and with the pelletizing outer layer raw material obtained in step 1)
Material carries out pelletizing in the second balling disk (-sc), obtains composite pellet；
4) processing is dried in the composite pellet obtained in step 3)；
5) composite pellet after will be dry in step 4) carries out oxidizing roasting, obtains agglomerates；
6) agglomerates obtained in step 5) are carried out outside stove cooling so that dusting, outer layer dusting occur for agglomerates outer layer
Clinker is obtained, internal pelletizing is acid pellet；And
7) clinker and oxide pellet of firing are collected.
2. the method for production clinker and oxide pellet according to claim 1, which is characterized in that wherein step 1)
The each group distribution ratio of middle core material is the iron ore of 68~88 parts by weight, the iron-bearing mineral of 10~30 parts by weight, 20~25 weights
Measure the lime stone of part and the binder of 2~6 parts by weight.
3. the method for production clinker and oxide pellet according to claim 1, which is characterized in that the iron ore
To contain sulphur iron ore.
4. the method for production clinker and oxide pellet according to claim 3, which is characterized in that the sulfur-bearing iron
The content of sulphur is 10~30% in ore.
5. the method for production clinker and oxide pellet according to claim 1, which is characterized in that described to contain iron ore
Object is iron content poor quality mineral, and the poor quality mineral include one or more in copper smelting slag, nickel fibers slag, blast furnace ferrovanadium slag.
6. the method for production clinker and oxide pellet according to claim 1, which is characterized in that ball in step 1)
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
It is mixed, and it is 4~8% that binder, which accounts for the mass percent of total outer layer raw material,.
7. the method for production clinker and oxide pellet according to claim 1, which is characterized in that wherein step 4)
In before composite pellet being dried processing first composite pellet is sieved, and Particle size requirements will be met after screening ball
Processing is dried by drying grate in group.
8. the method for production clinker and oxide pellet according to claim 1, which is characterized in that wherein step 5)
Middle oxidizing roasting is to be calcined 28~40 minutes at 1250~1400 DEG C, and roasted after agglomerates are cooled to 1000 DEG C
Burn pelletizing.
9. the method for production clinker and oxide pellet according to claim 1, which is characterized in that in step 6)
Cooling is agglomerates to be transported to cooling 1~2 hour in heat preservation batch can, and the temperature of material after cooling is made to be maintained at 700
~800 DEG C.
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| CN108004396B (en) * | 2017-11-28 | 2019-05-07 | 酒泉钢铁(集团)有限责任公司 | It is a kind of to produce acidic oxidation pellet method 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 |
| 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 |
| 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 |
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| SU753917A1 (en) * | 1978-06-05 | 1980-08-07 | Институт металлургии Уральского научного центра АН СССР | Charge for moulding shells of iron ore pellets |
| CN101717854B (en) * | 2009-12-25 | 2012-06-27 | 重庆瑞帆再生资源开发有限公司 | Method for producing metallized pellet by using metallurgical roasting furnace |
| CN102417976B (en) * | 2011-11-16 | 2013-07-31 | 中南大学 | Method for preparing oxidated pellets from pure hematite concentrate |
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