CN101899343A - Blast furnace injection material - Google Patents
Blast furnace injection material Download PDFInfo
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- CN101899343A CN101899343A CN2009101434223A CN200910143422A CN101899343A CN 101899343 A CN101899343 A CN 101899343A CN 2009101434223 A CN2009101434223 A CN 2009101434223A CN 200910143422 A CN200910143422 A CN 200910143422A CN 101899343 A CN101899343 A CN 101899343A
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Abstract
The invention relates to a blast furnace injection material which is prepared in steps of preparing candle coal or noncaking coal into a lumpiness of 10-100 mm, carrying out carbonization in a carbonization furnace at 600-700 DEG C for 24 hours, classifying and processing the coal after the carbonization, and selecting powder of which the particle size is less than 5 mm as the blast furnace injection material. The invention lowers the blast furnace ironmaking coke ratio and the cast iron cost; can regulate the thermal system of the furnace, improve the operating state of the blast furnace hearth and ensure the stable and smooth operation of the blast furnace; and reduces the theoretical combustion temperature and creates conditions for realizing high-wind temperature and oxygen-enriched blast of the blast furnace. Compared with the gasification of coke, the gasification of injection coal powder discharges more hydrogen, thereby enhancing the reducibility and the penetration diffusivity of the gas and being beneficial to the improvement on ore reduction and blast furnace operation indexes. Metallurgical coke is replaced by the injection coal powder partially, thereby moderating requirements for the coke, decreasing coking facilities and saving the investment of capital construction. Besides, the invention decreases coke furnaces and produced coke and reduces the environmental pollution caused by coking production, and simultaneously, and powder generated in the semicoke production can be fully utilized.
Description
Technical field
The present invention relates to provide in a kind of Iron And Steel Industry production process the reductive agent of heat, but a kind of blast furnace blowing carbon of coke for replacing particularly.
Background technology
Modern blast furnace is smelted and is mostly used coke, the effect of heat and reductive agent is provided in the process of smelting, thereby coke is a kind of requisite in the blast furnace ironmaking process, yet the preparing condition more complicated of coke, generally be by bituminous coal under the condition of secluding air, be heated to 950-1050 ℃, then through super-dry, pyrolysis, fusion, bonding, solidify, stages such as contraction are finally made coke, like this, use coke not only to increase the production cost of iron and steel, aggravated the contradiction of shortage of resources, and can produce the objectionable impurities of contaminate environment in the production process of coke, thereby, seek that a kind of can to substitute coke imperative as the reductive agent of blast furnace ironmaking.
Summary of the invention
The objective of the invention is to worsening shortages, and the shortcoming of using coke ironmaking, provide a kind of Ramsbottom carbon powder or Ramsbottom carbon powder and long bituminous coal or mixed mixture of non-caking coal of using as the blast furnace injection material of smelting iron at coke resource.
Technical scheme of the present invention is: a kind of blast furnace injection material, described blast furnace injection material for will long bituminous coal or non-caking coal make the lumpiness of 10-100mm, put into charring furnace destructive distillation 24 hours under 600-700 ℃ condition, the coal after the destructive distillation is carried out the powder of classification processing back granularity below 5mm.
Preferably: described blast furnace injection material is above-mentioned powder and long bituminous coal or non-caking coal are mixture after the mixed of 70-80%:20-30% according to mass ratio.
Preferably: the shared mass fraction of fugitive constituent is 10-14% in the described blast furnace injection material, and the shared mass fraction of ash is 10%.
Beneficial effect of the present invention is: (1) partly substitutes with cheap coal dust and costs an arm and a leg and deficient day by day metallurgical coke, and the blast furnace ironmaking coke ratio is reduced, and pig iron cost descends; (2) coal powder injection can be adjusted working of a furnace thermal system; (3) coal powder injection can improve the blast furnace hearth working order, makes the blast furnace stable smooth operation; (4) Pen Chui coal dust gasification, and combustion before the air port can reduce theoretical combustion temperature, for keeping the necessary T reason of blast-furnace smelting, needs compensation, and this has just created condition for blast furnace uses high wind-warm syndrome and oxygen enriched blast; (5) emit the hydrogen of Duoing in the coal injection gasification, improved the reducing power of coal gas and penetrated diffusibility, help the improvement of ore reduction and blast furnace operating index than coke; (6) coal injection substitutes the part metallurgical coke, both relaxed the demand of coking coal, also reduced the coking facility, can save initial cost, especially part has reached the coke oven that needed overhaul in 30 years runtime, reduce the coke demand owing to substituting coke with coal dust, the coke oven of need overhaul can stop production and discard; (7) Coal powder spray coke for replacing reduces the amount of coke of coke oven seat number and production, thereby can reduce the pollution of coking production to environment, can make full use of the powder that produces in the blue charcoal production simultaneously.
Specify specific embodiments of the invention below:
Specific embodiment 1:
A kind of blast furnace injection material, described blast furnace injection material for will long bituminous coal or non-caking coal make the lumpiness of 10mm, put into charring furnace destructive distillation 24 hours under 600 ℃ condition, the coal after the destructive distillation is carried out the powder of classification processing back granularity below 5mm; Described blast furnace injection material is above-mentioned powder and long bituminous coal or non-caking coal are mixture after 70%: 30% the mixed according to mass ratio.The shared mass fraction of fugitive constituent is 10% in the described blast furnace injection material, and the shared mass fraction of ash is 10%.
Specific embodiment 2:
A kind of blast furnace injection material, described blast furnace injection material for will long bituminous coal or non-caking coal make the lumpiness of 50mm, put into charring furnace destructive distillation 24 hours under 650 ℃ condition, the coal after the destructive distillation is carried out the powder of classification processing back granularity below 5mm; Described blast furnace injection material is above-mentioned powder and long bituminous coal or non-caking coal are mixture after 75%: 25% the mixed according to mass ratio.The shared mass fraction of fugitive constituent is 12% in the described blast furnace injection material, and the shared mass fraction of ash is 10%.
Specific embodiment 3:
A kind of blast furnace injection material, described blast furnace injection material for will long bituminous coal or non-caking coal make the lumpiness of 100mm, put into charring furnace destructive distillation 24 hours under 700 ℃ condition, the coal after the destructive distillation is carried out the powder of classification processing back granularity below 5mm; Described blast furnace injection material is above-mentioned powder and long bituminous coal or non-caking coal are mixture after 80%: 20% the mixed according to mass ratio.The shared mass fraction of fugitive constituent is 14% in the described blast furnace injection material, and the shared mass fraction of ash is 10%.
Claims (3)
1. blast furnace injection material, it is characterized in that: described blast furnace injection material for will long bituminous coal or non-caking coal make the lumpiness of 10-100mm, put into charring furnace destructive distillation 24 hours under 600-700 ℃ condition, the coal after the destructive distillation is carried out the powder of classification processing back granularity below 5mm.
2. blast furnace injection material as claimed in claim 1 is characterized in that: described blast furnace injection material is above-mentioned powder and long bituminous coal or non-caking coal are mixture after the mixed of 70-80%: 20-30% according to mass ratio.
3. as claim 1 or 2 any described blast furnace injection materials, it is characterized in that: the shared mass fraction of fugitive constituent is 10-14% in the described blast furnace injection material, and the shared mass fraction of ash is 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101434223A CN101899343A (en) | 2009-05-25 | 2009-05-25 | Blast furnace injection material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101434223A CN101899343A (en) | 2009-05-25 | 2009-05-25 | Blast furnace injection material |
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| Publication Number | Publication Date |
|---|---|
| CN101899343A true CN101899343A (en) | 2010-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101434223A Pending CN101899343A (en) | 2009-05-25 | 2009-05-25 | Blast furnace injection material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719580A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Blast furnace operation method for improving hearth coke strength |
| CN103710037A (en) * | 2013-12-20 | 2014-04-09 | 清华大学 | Fluidized-bed low-rank coal upgrading utilization system and method |
| CN104060006A (en) * | 2013-04-18 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Material for injection, application and method thereof for blast furnace smelting |
| CN107400743A (en) * | 2016-05-18 | 2017-11-28 | 鞍钢股份有限公司 | A kind of blast-furnace coal powder injection method using semi-coke as part of fuel |
| CN109112239A (en) * | 2017-06-26 | 2019-01-01 | 鞍钢股份有限公司 | According to the method in conditions of blast furnace adjustment blowing mixed coal powder with addition of semi-coke quantity |
| WO2022011693A1 (en) * | 2020-07-17 | 2022-01-20 | 北京科技大学 | Optimization method for directional preparation technique and efficient use of semi-coke for blast furnace injection |
-
2009
- 2009-05-25 CN CN2009101434223A patent/CN101899343A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719580A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Blast furnace operation method for improving hearth coke strength |
| CN102719580B (en) * | 2011-03-29 | 2014-11-05 | 鞍钢股份有限公司 | Blast furnace operation method for improving hearth coke strength |
| CN104060006A (en) * | 2013-04-18 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Material for injection, application and method thereof for blast furnace smelting |
| CN104060006B (en) * | 2013-04-18 | 2016-04-06 | 攀钢集团攀枝花钢铁研究院有限公司 | The method of winding-up material and application and blast-furnace smelting |
| CN103710037A (en) * | 2013-12-20 | 2014-04-09 | 清华大学 | Fluidized-bed low-rank coal upgrading utilization system and method |
| CN107400743A (en) * | 2016-05-18 | 2017-11-28 | 鞍钢股份有限公司 | A kind of blast-furnace coal powder injection method using semi-coke as part of fuel |
| CN107400743B (en) * | 2016-05-18 | 2019-03-22 | 鞍钢股份有限公司 | A kind of blast-furnace coal powder injection method using semi-coke as part of fuel |
| CN109112239A (en) * | 2017-06-26 | 2019-01-01 | 鞍钢股份有限公司 | According to the method in conditions of blast furnace adjustment blowing mixed coal powder with addition of semi-coke quantity |
| WO2022011693A1 (en) * | 2020-07-17 | 2022-01-20 | 北京科技大学 | Optimization method for directional preparation technique and efficient use of semi-coke for blast furnace injection |
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Application publication date: 20101201 |