CN106381355A - Ironmaking method adopting high-proportion South African ore - Google Patents
Ironmaking method adopting high-proportion South African ore Download PDFInfo
- Publication number
- CN106381355A CN106381355A CN201610827980.1A CN201610827980A CN106381355A CN 106381355 A CN106381355 A CN 106381355A CN 201610827980 A CN201610827980 A CN 201610827980A CN 106381355 A CN106381355 A CN 106381355A
- Authority
- CN
- China
- Prior art keywords
- ore
- alkali metal
- powder
- south africa
- alkali
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 70
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 44
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 44
- 229910052742 iron Inorganic materials 0.000 claims abstract description 32
- 238000005245 sintering Methods 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 23
- 239000003513 alkali Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 238000005457 optimization Methods 0.000 claims abstract description 7
- 239000004744 fabric Substances 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 238000003723 Smelting Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 5
- 229910052681 coesite Inorganic materials 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 229910052906 cristobalite Inorganic materials 0.000 claims description 5
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- 229910052682 stishovite Inorganic materials 0.000 claims description 5
- 229910052905 tridymite Inorganic materials 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 4
- 238000009826 distribution Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000003034 coal gas Substances 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 8
- 235000004443 Ricinus communis Nutrition 0.000 description 4
- 238000005469 granulation Methods 0.000 description 4
- 230000003179 granulation Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000024121 nodulation Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to an ironmaking method adopting high-proportion South African ore. The method includes the steps that the control standard of in-furnace alkali metal is designed, specifically, the addition amount in iron per ton is not larger than 3.8 kg; the effect that moisture of a mixture is controlled to be 7.4%-7.9% is determined; 10%-12% of South Africa ore fines is added, meanwhile, PB powder and mac fines are applied, and the weight ratio of the South Africa ore fines to PB powder to mac fines is 1: 1: 2; the sintering flue temperature is 120 DEG C to 130 DEG C; circulating enrichment of the in-furnace alkali metal is reduced; all blast furnaces carry out regular alkali discharge operations in turn; and the material distributing angle is adjusted, so that reasonable distribution of coal gas flow is guaranteed. According to the ironmaking method adopting the high-proportion South African ore, ore proportioning optimization is reasonably performed, the scientific and reasonable control parameters are set, the damage to the blast furnaces due to poor sintering performance and high alkali metal content of South Africa fine ore is reduced, the service life of the blast furnaces is prolonged, the production cost of iron per ton is further reduced, and the quality of sintered ore is improved.
Description
Technical field
The present invention relates to ironmaking technology, particularly to a kind of iron smelting method using South Africa Iron Ores at high proportion.
Background technology
South Africa Iron Ores belong to the bloodstone of silicon in high ferro, and lump ore pulverization rate is low, and preferably, calorific intensity is general for reproducibility.Fine ore grain
Degree is relatively thick, and sintering character is relatively poor, applies larger on the impact of sintering deposit cryogenic reducting powder index at high proportion；South Africa Iron Ores K, Na
Higher Deng alkali metal content, the problems such as easily cause furnace nodulation after use, life-time service is unfavorable for prolonging campaign.
Content of the invention
The present invention is to solve above-mentioned problem, there is provided a kind of iron smelting method using South Africa Iron Ores at high proportion, its solution
Certainly the technical scheme of technical problem is：
A kind of iron smelting method using South Africa Iron Ores at high proportion, step is as follows：
（1）Formulate and control standard into stove alkali metal：Balance measuring and calculating blast furnace feeding alkali metal load, formulates alkali metal and enters on stove load
Limit standard：Ferrum addition per ton is not more than 3.8kg；
（2）Determine compound water water content：Determine that mixture moisture controls when 7.4～7.9%, sintering overly moist can be reduced existing
As can improve mixture granulation effect, improve sintering breathability again；
（3）Optimization Ore Matching structure：While with addition of 10～12% South Africa breeze, suitable adapted PB powder, Mike's powder, South Africa powder: PB
Powder:Mike's grain weight amount is than for 1:1:2, to improve temperature flowing in sintering process for the breeze it is ensured that sinter quality；
（4）Improve sintering flue temperature：On the basis of former 110 DEG C of flue temperatures, properly increase sintering flue temperature 10 DEG C～20
DEG C, mitigate castor bar, cleaner unit adhesion alkali metal phenomenon, it is to avoid paste grid section impact sintering process breathability；Just ensure main exhauster
Often run；
（5）Reduce alkali-metal circulation collection in stove：After blast furnace South Africa block proportioning raises, optimize burden distribution system, in adhering to opening
Motive stream is guiding theory, with " centre of development air-flow, take into account edge airflow " for Dispensing principle, reduces alkali-metal circulation in stove
Enrichment；
（6）Row's alkali：The change of key monitoring blast furnace ash alkali metal content, when blast furnace ash, sack dust alkali metal content are respectively lower than
0.25%th, 0.30% when, operation is taken reduction basicity of slag to 1.05 times, i.e. CaO:SiO2=1.05, molten iron physics thermal control exists
1450 DEG C～1500 DEG C, the Si content of molten iron is 0.3～0.5%；It was the cycle by 1 time/2 months, arrange each blast furnace to carry out in turn arranging alkali
Operation；
（7）Adjustment cloth angle：According to the variation tendency of Gas Flow, extend in good time or reduce cloth angle 0.1 degree/time it is ensured that
Gas Flow reasonable layout；Formulate rational operate policy, furnace temperature, material speed and pressure differential range etc. are it is ensured that conditions of blast furnace direct motion.
The invention has the advantages that：
The present invention relates to a kind of iron smelting method using South Africa Iron Ores at high proportion, rationally carry out Blending optimization, setting is scientific and reasonable
Control parameter, reduces South Africa powder mine sintering poor performance and alkali metal content height endangers to blast fumance, extends blast furnace and uses the longevity
Life, reduces ton ferrum production cost further, improves sinter quality.
Specific embodiment
With reference to specific embodiment, the invention will be further described, but the present invention is not limited to this；
Embodiment 1
A kind of iron smelting method using South Africa Iron Ores at high proportion, step is as follows：
（1）Formulate and control standard into stove alkali metal：Balance measuring and calculating blast furnace feeding alkali metal load, formulates alkali metal and enters on stove load
Limit standard：Ferrum addition per ton is not more than 3.8kg；
（2）Determine compound water water content：Determine that mixture moisture controls when 7.4%, sintering overly moist phenomenon can be reduced, and
Mixture granulation effect can be improved, improve sintering breathability；
（3）Optimization Ore Matching structure：While with addition of 10% South Africa breeze, suitable adapted PB powder, Mike's powder, South Africa powder:PB powder:
Mike's grain weight amount is than for 1:1:2, to improve temperature flowing in sintering process for the breeze it is ensured that sinter quality；
（4）Improve sintering flue temperature：On the basis of former 110 DEG C of flue temperatures, properly increase 10 DEG C of flue temperature of sintering, mitigate
Castor bar, cleaner unit adhesion alkali metal phenomenon, it is to avoid paste grid section impact sintering process breathability；Ensure that main exhauster normally runs；
（5）Reduce alkali-metal circulation collection in stove：After blast furnace South Africa block proportioning raises, optimize burden distribution system, in adhering to opening
Motive stream is guiding theory, with " centre of development air-flow, take into account edge airflow " for Dispensing principle, reduces alkali-metal circulation in stove
Enrichment；
（6）Row's alkali：The change of key monitoring blast furnace ash alkali metal content, when blast furnace ash alkali metal content is less than 0.25%, sack dust
When alkali metal content is less than 0.30%, operation is taken reduction basicity of slag to 1.05 times, i.e. CaO:SiO2=1.05, molten iron physics
At 1450 DEG C～1470 DEG C, the Si content of molten iron is 0.3～0.5% for thermal control；It was the cycle by 1 time/2 months, arrange each blast furnace in turn
Carry out arranging alkali operation；
（7）Adjustment cloth angle：According to the variation tendency of Gas Flow, extend in good time or reduce cloth angle 0.1 degree/time it is ensured that
Gas Flow reasonable layout；Formulate rational operate policy, furnace temperature, material speed and pressure differential range etc. are it is ensured that conditions of blast furnace direct motion.
Embodiment 2
A kind of iron smelting method using South Africa Iron Ores at high proportion, step is as follows：
（1）Formulate and control standard into stove alkali metal：Balance measuring and calculating blast furnace feeding alkali metal load, formulates alkali metal and enters on stove load
Limit standard：Ferrum addition per ton is not more than 3.6kg；
（2）Determine compound water water content：Determine that mixture moisture controls when 7.6%, sintering overly moist phenomenon can be reduced, and
Mixture granulation effect can be improved, improve sintering breathability；
（3）Optimization Ore Matching structure：While with addition of 11% South Africa breeze, suitable adapted PB powder, Mike's powder, South Africa powder:PB powder:
Mike's grain weight amount is than for 1:1:2, to improve temperature flowing in sintering process for the breeze it is ensured that sinter quality；
（4）Improve sintering flue temperature：On the basis of former 110 DEG C of flue temperatures, properly increase 15 DEG C of flue temperature of sintering, mitigate
Castor bar, cleaner unit adhesion alkali metal phenomenon, it is to avoid paste grid section impact sintering process breathability；Ensure that main exhauster normally runs；
（5）Reduce alkali-metal circulation collection in stove：After blast furnace South Africa block proportioning raises, optimize burden distribution system, in adhering to opening
Motive stream is guiding theory, with " centre of development air-flow, take into account edge airflow " for Dispensing principle, reduces alkali-metal circulation in stove
Enrichment；
（6）Row's alkali：The change of key monitoring blast furnace ash alkali metal content, when blast furnace ash alkali metal content is less than 0.25%, sack dust
When alkali metal content is less than 0.30%, operation is taken reduction basicity of slag to 1.05 times, i.e. CaO:SiO2=1.05, molten iron physics
At 1470 DEG C～1500 DEG C, the Si content of molten iron is 0.3～0.5% for thermal control；It was the cycle by 1 time/2 months, arrange each blast furnace in turn
Carry out arranging alkali operation；
（7）Adjustment cloth angle：According to the variation tendency of Gas Flow, extend in good time or reduce cloth angle 0.1 degree/time it is ensured that
Gas Flow reasonable layout；Formulate rational operate policy, furnace temperature, material speed and pressure differential range etc. are it is ensured that conditions of blast furnace direct motion.
Embodiment 3
A kind of iron smelting method using South Africa Iron Ores at high proportion, step is as follows：
（1）Formulate and control standard into stove alkali metal：Balance measuring and calculating blast furnace feeding alkali metal load, formulates alkali metal and enters on stove load
Limit standard：Ferrum addition per ton is not more than 3.4kg；
（2）Determine compound water water content：Determine that mixture moisture controls when 7.9%, sintering overly moist phenomenon can be reduced, and
Mixture granulation effect can be improved, improve sintering breathability；
（3）Optimization Ore Matching structure：While with addition of 12% South Africa breeze, suitable adapted PB powder, Mike's powder, South Africa powder:PB powder:
Mike's grain weight amount is than for 1:1:2, to improve temperature flowing in sintering process for the breeze it is ensured that sinter quality；
（4）Improve sintering flue temperature：On the basis of former 110 DEG C of flue temperatures, properly increase 20 DEG C of flue temperature of sintering, mitigate
Castor bar, cleaner unit adhesion alkali metal phenomenon, it is to avoid paste grid section impact sintering process breathability；Ensure that main exhauster normally runs；
（5）Reduce alkali-metal circulation collection in stove：After blast furnace South Africa block proportioning raises, optimize burden distribution system, in adhering to opening
Motive stream is guiding theory, with " centre of development air-flow, take into account edge airflow " for Dispensing principle, reduces alkali-metal circulation in stove
Enrichment；
（6）Row's alkali：The change of key monitoring blast furnace ash alkali metal content, when blast furnace ash alkali metal content respectively lower than 0.25%, cloth
During the grey alkali metal content of bag respectively lower than 0.30%, operation is taken reduction basicity of slag to 1.05 times, i.e. CaO:SiO2=1.05,
At 1460 DEG C～1480 DEG C, the Si content of molten iron is 0.3～0.5% for molten iron physics thermal control；It was the cycle by 1 time/2 months, arrange each
Blast furnace carries out arranging alkali operation in turn；
（7）Adjustment cloth angle：According to the variation tendency of Gas Flow, extend in good time or reduce cloth angle 0.1 degree/time it is ensured that
Gas Flow reasonable layout；Formulate rational operate policy, furnace temperature, material speed and pressure differential range etc. are it is ensured that conditions of blast furnace direct motion.
The foregoing is only the specific embodiment of the present invention, be not limited to the present invention, for this area
For technical staff, the present invention can have various modifications and variations；All made within the spirit and principles in the present invention any
Modification, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (1)
1. a kind of iron smelting method using South Africa Iron Ores at high proportion, step is as follows：
（1）Formulate and control standard into stove alkali metal：Ferrum addition per ton is not more than 3.8kg；
（2）Determine compound water water content：Mixture moisture controls 7.4～7.9%；
（3）Optimization Ore Matching structure：While with addition of 10～12% South Africa breeze, adapted PB powder, Mike's powder, South Africa powder:PB powder:
Mike's grain weight amount is than for 1:1:2；
（4）Improve sintering flue temperature：Sintering flue temperature is 120 DEG C～130 DEG C；
（5）Reduce alkali-metal circulation collection in stove；
（6）Row's alkali：The change of key monitoring blast furnace ash alkali metal content, when blast furnace ash content is less than 0.25%, sack dust alkali metal
When content is less than 0.30%, operation is taken reduction basicity of slag to 1.05 times, i.e. CaO:SiO2=1.05, molten iron physics thermal control
At 1450 DEG C～1500 DEG C, the Si content of molten iron is 0.3～0.5%；It was the cycle by 1 time/2 months, arrange each blast furnace to be arranged in turn
Alkali operates；
（7）Adjustment cloth angle：Extend in good time or reduce cloth angle 0.1 degree/time it is ensured that Gas Flow reasonable layout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610827980.1A CN106381355B (en) | 2016-09-19 | 2016-09-19 | A kind of iron smelting method using high proportion South Africa Iron Ores |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610827980.1A CN106381355B (en) | 2016-09-19 | 2016-09-19 | A kind of iron smelting method using high proportion South Africa Iron Ores |
Publications (2)
| Publication Number | Publication Date |
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| CN106381355A true CN106381355A (en) | 2017-02-08 |
| CN106381355B CN106381355B (en) | 2018-07-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112280915A (en) * | 2020-10-09 | 2021-01-29 | 新疆八一钢铁股份有限公司 | Iron-making method by using high-zinc magnetite ore blending |
| CN114540562A (en) * | 2022-01-18 | 2022-05-27 | 红河钢铁有限公司 | Method for smelting qualified pig iron based on high-harmful-element ore with low consumption |
-
2016
- 2016-09-19 CN CN201610827980.1A patent/CN106381355B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| 王盟等: "石横特钢高比例南非矿综合冶炼技术", 《山东冶金》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112280915A (en) * | 2020-10-09 | 2021-01-29 | 新疆八一钢铁股份有限公司 | Iron-making method by using high-zinc magnetite ore blending |
| CN114540562A (en) * | 2022-01-18 | 2022-05-27 | 红河钢铁有限公司 | Method for smelting qualified pig iron based on high-harmful-element ore with low consumption |
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| Publication number | Publication date |
|---|---|
| CN106381355B (en) | 2018-07-20 |
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Denomination of invention: A Ironmaking Method Using High Ratio South African Mines Effective date of registration: 20231222 Granted publication date: 20180720 Pledgee: Industrial and Commercial Bank of China Limited Feicheng sub branch Pledgor: SHIHENG SPECIAL STEEL GROUP Co.,Ltd. Registration number: Y2023980073806 |