CN107782147A - A kind of method for reducing pallet burnup - Google Patents
A kind of method for reducing pallet burnup Download PDFInfo
- Publication number
- CN107782147A CN107782147A CN201610764478.0A CN201610764478A CN107782147A CN 107782147 A CN107782147 A CN 107782147A CN 201610764478 A CN201610764478 A CN 201610764478A CN 107782147 A CN107782147 A CN 107782147A
- Authority
- CN
- China
- Prior art keywords
- burnup
- sintering
- baffle plate
- breast board
- fuel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
Abstract
A kind of method for reducing sintering feed chassis burnup, sintered material is optimized, C benchmark are matched somebody with somebody in reduction, solve waste caused by matching somebody with somebody C benchmark height；Improve weight ash proportioning, it is ensured that reasonable raw material mix and preferably sintering character；Using sintering material layer thickness is improved, using auto accumulation heat is sintered, burnup is reduced；In addition, improving cloth temperature, burnup can be further reduced；The method that sintering feed chassis burnup is reduced using the present invention, can make burnup be reduced to 49 kg/t, greatly reduce cost, save energy consumption.
Description
Technical field
The invention belongs to sintering technology field, and in particular to a kind of method for reducing sintering feed chassis burnup.
Background technology
Sintering deposit solid burnup accounts for 70% or so critical role in sintering circuit total energy consumption, therefore reduces solid combustion
Material consumption, cost is reduced to sintering production, saving energy consumption has great significance；And sintering deposit burnup is higher at present, reach
61.4kg/t, therefore it is the technical problem for being badly in need of solving in current sintering deposit production to reduce burnup.
The content of the invention
The purpose of the present invention is that provides a kind of reduction sintering feed chassis burnup to solve the deficiencies in the prior art
Method.
The purpose of the present invention is realized in the following manner：
A kind of method for reducing sintering feed chassis burnup, comprises the following steps：
（1）Dispensing：Sintering feed is made up of three kinds of iron charge, fuel, solvent raw materials, wherein the mass ratio of iron charge, fuel, solvent
For 100:(4.65-4.75):(11-13)；Wherein fuel is made up of coal washing, coke powder, weight ash, coal washing, coke powder, the mass ratio of weight ash
Example is (20-82):(14-76):(4-6)；
（2）Mixing and granulation：Mixing and granulation process material temperature is controlled to be more than 50 DEG C；
（3）Cloth：Cloth material temperature is controlled to be more than 50 DEG C, it is baffled in pallet breast board top both sides, using Overruning cloth,
Improve sintering material layer thickness 7-10%；
（4）Sintering：Sintering negative pressure is 11-13kPa.
Step（1）The raw coal of middle coal washing fixes C content and is more than 72.2%, and content of ashes is less than 17%.
Step（1）0.5-3mm granularities are more than 80% in middle fuel, and the granularity more than 5mm is less than 10%.
Step（1）Coal washing, coke powder, the mass ratio of weight ash are (18-26) in middle fuel:(70-76):(4-6).
Step（2）It is middle using hot water dilute iron cement water batch mixing by the way of and use automatic steam control material temperature.
Step（3）In two side shields from top to bottom in gradually big bell mouth shape, do not contacted between baffle plate and breast board, baffle plate top
End is located at breast board top end, and baffle plate lower end is located at below breast board top.
The baffle plate is 20-40 ° with vertical line angle of inclination, and the baffle plate and the gap d on breast board top are 0.8-
1.2cm, the vertical range on baffle plate top and breast board top is 18-22cm.
The baffle plate is fixed on multi-roller spreader.
Relative to prior art, C benchmark are matched somebody with somebody in feed proportioning optimization of the present invention, reduction, solve waste caused by matching somebody with somebody C benchmark height；Carry
Height weight ash proportioning, it is ensured that reasonable raw material mix and preferably sintering character；Using sintering material layer thickness is improved, using sintering automatically
Accumulation of heat, reduce burnup；In addition, improving cloth temperature, burnup can be further reduced；Sintering feed chassis burnup is reduced using the present invention
Method, burnup can be made to be reduced to 49 kg/t, greatly reduce cost, saved energy consumption.
Brief description of the drawings
Fig. 1 is the structural representation of breast board and baffle plate of the present invention；
Fig. 2 is the dimensional structure diagram of breast board and baffle plate.
Embodiment
Embodiment 1
A kind of method for reducing sintering feed chassis burnup, comprises the following steps：
（1）Dispensing：Sintering feed is made up of three kinds of iron charge, fuel, solvent raw materials, wherein the mass ratio of iron charge, fuel, solvent
For 100:(4.65-4.75):(11-13)；Wherein fuel is made up of coal washing, coke powder, weight ash, coal washing, coke powder, the mass ratio of weight ash
Example is (20-82):(14-76):(4-6)；Wherein：The raw coal of coal washing fixes C content and is more than 72.2%, and content of ashes is less than 17%,
0.5-3mm granularities are more than 80% in fuel, and the granularity more than 5mm is less than 10%；Reduce caused by granularity fuel above and below the bed of material
The problem of burnup is high caused by irrational distribution；Coal washing, coke powder, the mass ratio of weight ash are (18-26) in preferred fuel:(70-
76):(4-6), the ratio of coke powder is improved, S contents in flue gas can be reduced；
（2）Mixing and granulation：Mixing and granulation process material temperature is controlled to be more than 50 DEG C, preferably no more than 100 DEG C；Hot water dilution can be used
The mode of iron cement water batch mixing uses automatic steam control material temperature；
（3）Cloth：Cloth material temperature is controlled more than 50 DEG C, it is baffled in pallet breast board top both sides, using Overruning cloth
Material, improve sintering material layer thickness 7-10%；Baffle arrangement as shown in figure 1, two side shields 2 from top to bottom in gradually big bell mouth shape,
Do not contacted between baffle plate 2 and breast board 1, baffle plate top is located at breast board top end, and baffle plate lower end is located at below breast board top；Cloth
When, due to the barrier effect of baffle plate 2, bed of material upper end can overflow breast board 1 without dropping, and so as to improve thickness of feed layer, improve material
Layer auto accumulation heat effect is so as to reducing burnup；Baffle plate 2 and vertical line angle of inclination a is 20-40 °, the gap d of baffle plate 2 and breast board 1
For 0.8-1.2cm, the vertical range c on the top of baffle plate 2 and the top of breast board 1 is 18-22cm；Baffle plate is preferably rectangle, and one end is solid
It is scheduled on multi-roller distributing device for sintering machine 3, the other end is fixed on the column 4 between multi-roller distributing device for sintering machine and igniter；Can
Thickness of feed layer is brought up into 730mm by original 680mm；
（4）Sintering：Sintering negative pressure is 11-13kPa, sinters negative pressure by improving, further reduces burnup.
The method that sintering feed chassis burnup is reduced using the present invention, can make burnup be reduced to 49 kg/t, greatly reduce
Cost, energy consumption is saved.
Embodiment 2
A kind of method for reducing sintering feed chassis burnup, comprises the following steps：
（1）Dispensing：Sintering feed is made up of three kinds of iron charge, fuel, solvent raw materials, and wherein iron charge, fuel, the mass ratio of solvent are
100:4.7:12；Wherein fuel is made up of coal washing, coke powder, weight ash, and coal washing, coke powder, the mass ratio of weight ash are 20:75:5；
（2）Mixing and granulation：It is 60 DEG C to control mixing and granulation process material temperature；Steam can be used and using hot water dilution iron cement water batch mixing
Mode control material temperature；
（3）Cloth：It is 60 DEG C to control cloth material temperature, baffled in pallet breast board top both sides, using Overruning cloth；Gear
Plate 2 and vertical line angle of inclination a is 30 °, and the gap d of baffle plate 2 and breast board 1 is 1cm, and the top of baffle plate 2 is vertical with the top of breast board 1
Distance c is 20cm；Thickness of feed layer is brought up into 730mm by original 680mm；
（4）Sintering：Sintering negative pressure is 12kPa, sinters negative pressure by improving, further reduces burnup.
Embodiment 3
A kind of method for reducing sintering feed chassis burnup, comprises the following steps：
（1）Dispensing：Sintering feed is made up of three kinds of iron charge, fuel, solvent raw materials, and wherein iron charge, fuel, the mass ratio of solvent are
100:4.7:12；Wherein fuel is made up of coal washing, coke powder, weight ash, and coal washing, coke powder, the mass ratio of weight ash are 80:15:5；
（2）Mixing and granulation：It is 55 DEG C to control mixing and granulation process material temperature；Steam can be used and using hot water dilution iron cement water batch mixing
Mode control material temperature；
（3）Cloth：It is 55 DEG C to control cloth material temperature, baffled in pallet breast board top both sides, using Overruning cloth, gear
Plate 2 and vertical line angle of inclination a is 30 °, and the gap d of baffle plate 2 and breast board 1 is 1cm, and the top of baffle plate 2 is vertical with the top of breast board 1
Distance c is 20cm；Thickness of feed layer is brought up into 730mm by original 680mm；
（4）Sintering：Sintering negative pressure is 12kPa, sinters negative pressure by improving, further reduces burnup.
Embodiment 4
A kind of method for reducing sintering feed chassis burnup, comprises the following steps：
（1）Dispensing：Sintering feed is made up of three kinds of iron charge, fuel, solvent raw materials, wherein the mass ratio of iron charge, fuel, solvent
For 100:4.7:12；Wherein fuel is made up of coal washing, coke powder, weight ash, and coal washing, coke powder, the mass ratio of weight ash are 20:76:4；
（2）Mixing and granulation：It is 70 DEG C to control mixing and granulation process material temperature；Steam can be used and using hot water dilution iron cement water batch mixing
Mode control material temperature；
（3）Cloth：It is 70 DEG C to control cloth material temperature, baffled in pallet breast board top both sides, using Overruning cloth, gear
Plate 2 and vertical line angle of inclination a is 30 °, and the gap d of baffle plate 2 and breast board 1 is 1cm, and the top of baffle plate 2 is vertical with the top of breast board 1
Distance c is 20cm；Thickness of feed layer is brought up into 730mm by original 680mm；
（4）Sintering：Sintering negative pressure is 13kPa, sinters negative pressure by improving, further reduces burnup.
Embodiment 5
A kind of method for reducing sintering feed chassis burnup, comprises the following steps：
（1）Dispensing：Sintering feed is made up of three kinds of iron charge, fuel, solvent raw materials, and wherein iron charge, fuel, the mass ratio of solvent are
100:4.7:12；Wherein fuel is made up of coal washing, coke powder, weight ash, and coal washing, coke powder, the mass ratio of weight ash are 26:70:4；
（2）Mixing and granulation：It is 75 DEG C to control mixing and granulation process material temperature；Steam can be used and using hot water dilution iron cement water batch mixing
Mode control material temperature；
（3）Cloth：It is 75 DEG C to control cloth material temperature, baffled in pallet breast board top both sides, using Overruning cloth, gear
Plate 2 and vertical line angle of inclination a is 30 °, and the gap d of baffle plate 2 and breast board 1 is 1cm, and the top of baffle plate 2 is vertical with the top of breast board 1
Distance c is 20cm；Thickness of feed layer is brought up into 730mm by original 680mm；
（4）Sintering：Sintering negative pressure is 12kPa, sinters negative pressure by improving, further reduces burnup.
Embodiment 6
A kind of method for reducing sintering feed chassis burnup, comprises the following steps：
（1）Dispensing：Sintering feed is made up of three kinds of iron charge, fuel, solvent raw materials, and wherein iron charge, fuel, the mass ratio of solvent are
100:4.65:11；Wherein fuel is made up of coal washing, coke powder, weight ash, and coal washing, coke powder, the mass ratio of weight ash are 18:76:6；
（2）Mixing and granulation：Mixing and granulation process material temperature is controlled to be more than 50 DEG C；Steam can be used and mixed using hot water dilution iron cement water
The mode of material controls material temperature；
（3）Cloth：Cloth material temperature is controlled to be more than 50 DEG C, it is baffled in pallet breast board top both sides, using Overruning cloth,
Baffle plate 2 and vertical line angle of inclination a is 30 °, and the gap d of baffle plate 2 and breast board 1 is 1cm, and the top of baffle plate 2 is hung down with the top of breast board 1
Directly distance c is 20cm；Thickness of feed layer is brought up into 730mm by original 680mm；
（4）Sintering：Sintering negative pressure is 11kPa, sinters negative pressure by improving, further reduces burnup.
Embodiment 7
A kind of method for reducing sintering feed chassis burnup, comprises the following steps：
（1）Dispensing：Sintering feed is made up of three kinds of iron charge, fuel, solvent raw materials, and wherein iron charge, fuel, the mass ratio of solvent are
100:4.75:12；Wherein fuel is made up of coal washing, coke powder, weight ash, and coal washing, coke powder, the mass ratio of weight ash are 40:55:5；
（2）Mixing and granulation：Mixing and granulation process material temperature is controlled to be more than 50 DEG C；Steam can be used and mixed using hot water dilution iron cement water
The mode of material controls material temperature；
（3）Cloth：Cloth material temperature is controlled to be more than 50 DEG C, it is baffled in pallet breast board top both sides, using Overruning cloth,
Baffle plate 2 and vertical line angle of inclination a is 30 °, and the gap d of baffle plate 2 and breast board 1 is 1cm, and the top of baffle plate 2 is hung down with the top of breast board 1
Directly distance c is 20cm；Thickness of feed layer is brought up into 730mm by original 680mm；
（4）Sintering：Sintering negative pressure is 11kPa, sinters negative pressure by improving, further reduces burnup.
Embodiment 8
A kind of method for reducing sintering feed chassis burnup, comprises the following steps：
（1）Dispensing：Sintering feed is made up of three kinds of iron charge, fuel, solvent raw materials, and wherein iron charge, fuel, the mass ratio of solvent are
100:4.75:13；Wherein fuel is made up of coal washing, coke powder, weight ash, and coal washing, coke powder, the mass ratio of weight ash are 50:45:5；
（2）Mixing and granulation：Mixing and granulation process material temperature is controlled to be more than 50 DEG C；Steam can be used and mixed using hot water dilution iron cement water
The mode of material controls material temperature；
（3）Cloth：Cloth material temperature is controlled to be more than 50 DEG C, it is baffled in pallet breast board top both sides, using Overruning cloth,
Baffle plate 2 and vertical line angle of inclination a is 30 °, and the gap d of baffle plate 2 and breast board 1 is 1cm, and the top of baffle plate 2 is hung down with the top of breast board 1
Directly distance c is 20cm；Thickness of feed layer is brought up into 730mm by original 680mm；
（4）Sintering：Sintering negative pressure is 12kPa, sinters negative pressure by improving, further reduces burnup.
Embodiment 9
A kind of method for reducing sintering feed chassis burnup, comprises the following steps：
（1）Dispensing：Sintering feed is made up of three kinds of iron charge, fuel, solvent raw materials, and wherein iron charge, fuel, the mass ratio of solvent are
100:4.75:11；Wherein fuel is made up of coal washing, coke powder, weight ash, and coal washing, coke powder, the mass ratio of weight ash are 60:35:5；
（2）Mixing and granulation：Mixing and granulation process material temperature is controlled to be more than 50 DEG C；Steam can be used and mixed using hot water dilution iron cement water
The mode of material controls material temperature；
（3）Cloth：Cloth material temperature is controlled to be more than 50 DEG C, it is baffled in pallet breast board top both sides, using Overruning cloth,
Baffle plate 2 and vertical line angle of inclination a is 30 °, and the gap d of baffle plate 2 and breast board 1 is 1cm, and the top of baffle plate 2 is hung down with the top of breast board 1
Directly distance c is 20cm；Thickness of feed layer is brought up into 730mm by original 680mm；
（4）Sintering：Sintering negative pressure is 12kPa, sinters negative pressure by improving, further reduces burnup.
Embodiment 10
A kind of method for reducing sintering feed chassis burnup, comprises the following steps：
（1）Dispensing：Sintering feed is made up of three kinds of iron charge, fuel, solvent raw materials, and wherein iron charge, fuel, the mass ratio of solvent are
100:4.7:12；Wherein fuel is made up of coal washing, coke powder, weight ash, and coal washing, coke powder, the mass ratio of weight ash are 70:25:5；
（2）Mixing and granulation：Mixing and granulation process material temperature is controlled to be more than 50 DEG C；Steam can be used and using hot water dilution iron cement water
The mode of batch mixing controls material temperature；
（3）Cloth：Cloth material temperature is controlled to be more than 50 DEG C, it is baffled in pallet breast board top both sides, using Overruning cloth,
Baffle plate 2 and vertical line angle of inclination a is 30 °, and the gap d of baffle plate 2 and breast board 1 is 1cm, and the top of baffle plate 2 is hung down with the top of breast board 1
Directly distance c is 20cm；Thickness of feed layer is brought up into 730mm by original 680mm；
（4）Sintering：Sintering negative pressure is 12kPa, sinters negative pressure by improving, further reduces burnup.
Embodiment 11
A kind of method for reducing sintering feed chassis burnup, comprises the following steps：
（1）Dispensing：Sintering feed is made up of three kinds of iron charge, fuel, solvent raw materials, and wherein iron charge, fuel, the mass ratio of solvent are
100:4.7:12；Wherein fuel is made up of coal washing, coke powder, weight ash, and coal washing, coke powder, the mass ratio of weight ash are 82:14:4；
（2）Mixing and granulation：Mixing and granulation process material temperature is controlled to be more than 50 DEG C；Steam can be used and mixed using hot water dilution iron cement water
The mode of material controls material temperature；
（3）Cloth：Cloth material temperature is controlled to be more than 50 DEG C, it is baffled in pallet breast board top both sides, using Overruning cloth,
Baffle plate 2 and vertical line angle of inclination a is 30 °, and the gap d of baffle plate 2 and breast board 1 is 1cm, and the top of baffle plate 2 is hung down with the top of breast board 1
Directly distance c is 20cm；Thickness of feed layer is brought up into 730mm by original 680mm；
（4）Sintering：Sintering negative pressure is 12kPa, sinters negative pressure by improving, further reduces burnup.
Above-described is only the preferred embodiment of the present invention, it is noted that for those skilled in the art,
Under the premise of general idea of the present invention is not departed from, some changes and improvements can also be made, these should also be considered as the present invention's
Protection domain.
Claims (8)
- A kind of 1. method for reducing sintering feed chassis burnup, it is characterised in that comprise the following steps：（1）Dispensing：Sintering feed is made up of three kinds of iron charge, fuel, solvent raw materials, and wherein iron charge, fuel, the mass ratio of solvent are 100:(4.65-4.75):(11-13)；Wherein fuel is made up of coal washing, coke powder, weight ash, coal washing, coke powder, the mass ratio of weight ash For (20-82):(14-76):(4-6)；（2）Mixing and granulation：Mixing and granulation process material temperature is controlled to be more than 50 DEG C；（3）Cloth：Cloth material temperature is controlled to be more than 50 DEG C, it is baffled in pallet breast board top both sides, using Overruning cloth, Improve sintering material layer thickness 7-10%；（4）Sintering：Sintering negative pressure is 11-13kPa.
- 2. the method for sintering feed chassis burnup is reduced as claimed in claim 1, it is characterised in that：Step（1）The original of middle coal washing Coal fixes C content and is more than 72.2%, and content of ashes is less than 17%.
- 3. the method for sintering feed chassis burnup is reduced as claimed in claim 1, it is characterised in that：Step（1）In middle fuel 0.5-3mm granularities are more than 80%, and the granularity more than 5mm is less than 10%.
- 4. the method for sintering feed chassis burnup is reduced as claimed in claim 1, it is characterised in that：Step（1）Washed in middle fuel Coal, coke powder, the mass ratio of weight ash are (18-26):(70-76):(4-6).
- 5. the method for sintering feed chassis burnup is reduced as claimed in claim 1, it is characterised in that：Step（2）It is middle to use hot water Dilute the mode of iron cement water batch mixing and use automatic steam control material temperature.
- 6. the method for sintering feed chassis burnup is reduced as claimed in claim 1, it is characterised in that：Step（3）In two side shields From top to bottom in gradually big bell mouth shape, do not contacted between baffle plate and breast board, baffle plate top is located at breast board top end, under baffle plate End is below breast board top.
- 7. the method for sintering feed chassis burnup is reduced as claimed in claim 6, it is characterised in that：The baffle plate inclines with vertical line Rake angle is 20-40 °, and the baffle plate and the gap d on breast board top are 0.8-1.2cm, and baffle plate top is vertical with breast board top Distance is 18-22cm.
- 8. the method for sintering feed chassis burnup is reduced as claimed in claim 6, it is characterised in that：The baffle plate is fixed on multiple roll On distributing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610764478.0A CN107782147A (en) | 2016-08-30 | 2016-08-30 | A kind of method for reducing pallet burnup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610764478.0A CN107782147A (en) | 2016-08-30 | 2016-08-30 | A kind of method for reducing pallet burnup |
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| Publication Number | Publication Date |
|---|---|
| CN107782147A true CN107782147A (en) | 2018-03-09 |
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| CN201610764478.0A Pending CN107782147A (en) | 2016-08-30 | 2016-08-30 | A kind of method for reducing pallet burnup |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1956101A4 (en) * | 2005-10-31 | 2009-12-02 | Jfe Steel Corp | Process for producing sintered ore and sintering machine |
| CN202024605U (en) * | 2010-12-30 | 2011-11-02 | 首钢京唐钢铁联合有限责任公司 | Trapezoid material depositing apparatus of a sintering machine |
| CN104263911A (en) * | 2014-09-28 | 2015-01-07 | 四川德胜集团钒钛有限公司 | Preparation method of vanadium titano-magnetite sinter |
| CN104313308A (en) * | 2014-11-21 | 2015-01-28 | 攀钢集团攀枝花钢钒有限公司 | Iron ore low-carbon sintering method |
| CN104694738A (en) * | 2013-12-06 | 2015-06-10 | 攀钢集团研究院有限公司 | A preparing method of vanadium-titanium sintered ore |
-
2016
- 2016-08-30 CN CN201610764478.0A patent/CN107782147A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1956101A4 (en) * | 2005-10-31 | 2009-12-02 | Jfe Steel Corp | Process for producing sintered ore and sintering machine |
| CN202024605U (en) * | 2010-12-30 | 2011-11-02 | 首钢京唐钢铁联合有限责任公司 | Trapezoid material depositing apparatus of a sintering machine |
| CN104694738A (en) * | 2013-12-06 | 2015-06-10 | 攀钢集团研究院有限公司 | A preparing method of vanadium-titanium sintered ore |
| CN104263911A (en) * | 2014-09-28 | 2015-01-07 | 四川德胜集团钒钛有限公司 | Preparation method of vanadium titano-magnetite sinter |
| CN104313308A (en) * | 2014-11-21 | 2015-01-28 | 攀钢集团攀枝花钢钒有限公司 | Iron ore low-carbon sintering method |
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