CN108396086A - A kind of method of blast furnace process large scale blowing bituminous coal - Google Patents
A kind of method of blast furnace process large scale blowing bituminous coal Download PDFInfo
- Publication number
- CN108396086A CN108396086A CN201710064851.6A CN201710064851A CN108396086A CN 108396086 A CN108396086 A CN 108396086A CN 201710064851 A CN201710064851 A CN 201710064851A CN 108396086 A CN108396086 A CN 108396086A
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- CN
- China
- Prior art keywords
- bituminous coal
- blast furnace
- large scale
- furnace process
- process large
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention provides a kind of method of blast furnace process large scale blowing bituminous coal, and blast furnace process large scale blowing bituminous coal must satisfy：The grindability index of bituminous coal is more than 50；Sinter basicity R ＞ 1.95, FeO≤8% ensure that sinter has higher reproducibility；The ratio for entering stove pellet ore is not less than 20%；Rich Oxygen Amount is more than 8000m3/min.The present invention rationally controls the chemical composition and burden structure into stove sinter and suitable blowing oxygen quantity, the injection amount of bituminous coal can be made to reach 60% or more by selecting suitable coal；After blast furnace process large scale blowing bituminous coal, anthracite is blown ratio and reduces, and can not only be greatly saved anthracite resource, but also iron per ton can reduce by 6 yuan of smelting cost.
Description
Technical field
The invention belongs to blast furnace smelting process technical field, more particularly to a kind of injection amount making bituminous coal reaches 63%
The method of blast furnace process large scale blowing bituminous coal.
Background technology
Furnace coal spraying technology can make blast furnace that coke consumption be greatly lowered, although coal resources in China is abundant, coking
Coal resource situation is simultaneously pessimistic, most economical practical is arranged so blast furnace process is one making up coke notch using a large amount of coal powder injections
It applies.
Injection coal is divided into bituminous coal and anthracite.The bituminous coal coalforming period is short, and high containing fugitive constituent, ignition point is low, is readily burned, containing waving
Hair point is higher, and thermal decomposition and burning velocity are faster；Bituminous coal contains H2Higher than anthracite, be conducive to the reduction of iron ore；Bituminous coal one
As grindability be better than anthracite.From the point of view of natural resources, bituminous coal storage capacity is more than anthracite and distributed more widely, is easy to buy, and
Bituminous coal price is low, so blowing bituminous coal is conducive to rationally utilize resource.But since large scale blowing bituminous coal makes raw material and operation
Degree requires relatively high, and bituminous coal phosphorus content is relatively low, exists and the security risks such as is easy to spontaneous combustion, catches fire, explode, so large scale spray
Bituminous coal is blown to be restricted.
Invention content
The present invention is intended to provide a kind of can not only reduce anthracitic usage amount, but also ratio of putting coke into furnace can be reduced,
The method for advantageously reducing the blast furnace process large scale blowing bituminous coal of ironmaking cost.
For this purpose, the technical solution that the present invention is taken is：
A kind of method of blast furnace process large scale blowing bituminous coal, blast furnace process large scale blowing bituminous coal must satisfy following
Condition：
(1) grindability index of bituminous coal is more than 50；
(2) sinter basicity R ＞ 1.95, FeO≤8% ensure that sinter has higher reproducibility；
(3) burden structure：The ratio for entering stove pellet ore is not less than 20%；
(4) operating duty：Rich Oxygen Amount is more than 8000m3/min。
Beneficial effects of the present invention are：
The present invention rationally controls the chemical composition and burden structure into stove sinter by the suitable coal of selection, and
Suitable blowing oxygen quantity can make the injection amount of bituminous coal reach 60% or more；After blast furnace process large scale blowing bituminous coal, anthracite injection
Ratio reduces, and can not only be greatly saved anthracite resource, but also when bituminous coal injection ratio is 63%, and anthracite injection ratio is
37%, 26% is reduced, being equivalent to iron per ton reduces anthracite 37.5kg.Anthracite and bituminous coal price difference per ton is on 160 yuan of left sides
It is right.So after improving bituminous coal injection ratio, iron per ton can reduce by 6 yuan of smelting cost.
Specific implementation mode
Embodiment 1：
Enter the physical and chemical performance of stove sinter：
| TFe | FeO | R | 5-10mm | Rotary drum | RDI | RI |
| 55.82 | 7.85 | 1.98 | 24.62 | 79.25 | 94.86 | 80.79 |
Bf Burden：
Sinter：Pellet：Lump ore=70：22：8；
It is 52.65 to be blown anthracite grindability index；
Rich-oxygen of blast furnace amount：8500m3/min；
Injection coal ratio：
Anthracite：Bituminous coal：Coking, dust removing ash=29：65：6.
Embodiment 2：
Enter the physical and chemical performance of stove sinter：
| TFe | FeO | R | 5-10mm | Rotary drum | RDI | RI |
| 55.65 | 7.75 | 2.01 | 23.92 | 79.87 | 95.26 | 81.46 |
Bf Burden：
Sinter：Pellet：Lump ore=73：20：7；
It is 53.86 to be blown anthracite grindability index；
Rich-oxygen of blast furnace amount：8700m3/min；
Injection coal ratio：
Anthracite：Bituminous coal：Coking, dust removing ash=28：67：5.
Claims (1)
1. a kind of method of blast furnace process large scale blowing bituminous coal, which is characterized in that blast furnace process large scale blowing bituminous coal is necessary
Meet the following conditions：
(1) grindability index of bituminous coal is more than 50；
(2) sinter basicity R ＞ 1.95, FeO≤8% ensure that sinter has higher reproducibility；
(3) burden structure：The ratio for entering stove pellet ore is not less than 20%；
(4) operating duty：Rich Oxygen Amount is more than 8000m3/min。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710064851.6A CN108396086A (en) | 2017-02-05 | 2017-02-05 | A kind of method of blast furnace process large scale blowing bituminous coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710064851.6A CN108396086A (en) | 2017-02-05 | 2017-02-05 | A kind of method of blast furnace process large scale blowing bituminous coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108396086A true CN108396086A (en) | 2018-08-14 |
Family
ID=63093492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710064851.6A Pending CN108396086A (en) | 2017-02-05 | 2017-02-05 | A kind of method of blast furnace process large scale blowing bituminous coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108396086A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921139A (en) * | 2021-02-01 | 2021-06-08 | 攀钢集团攀枝花钢钒有限公司 | Fine coke utilization method for blast furnace injection |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103361453A (en) * | 2012-03-28 | 2013-10-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Blast-furnace smelting method for vanadium-titanium magnetite |
-
2017
- 2017-02-05 CN CN201710064851.6A patent/CN108396086A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103361453A (en) * | 2012-03-28 | 2013-10-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Blast-furnace smelting method for vanadium-titanium magnetite |
Non-Patent Citations (3)
| Title |
|---|
| 余楚勇等: "南钢2000m³高炉大比例喷吹高挥发性烟煤的研究与应用", 《冶金丛刊》 * |
| 张永旺等: "八钢高炉烟煤高煤比喷吹技术实践", 《2002年全国炼铁生产生产技术会议暨炼铁年会文集》 * |
| 贵永亮等: "《高炉喷煤理论与关键技术研究》", 30 June 2016, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921139A (en) * | 2021-02-01 | 2021-06-08 | 攀钢集团攀枝花钢钒有限公司 | Fine coke utilization method for blast furnace injection |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180814 |