CN110272045B - High-activity coke and preparation method thereof - Google Patents
High-activity coke and preparation method thereof Download PDFInfo
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- CN110272045B CN110272045B CN201910658020.0A CN201910658020A CN110272045B CN 110272045 B CN110272045 B CN 110272045B CN 201910658020 A CN201910658020 A CN 201910658020A CN 110272045 B CN110272045 B CN 110272045B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
- C01B32/33—Preparation characterised by the starting materials from distillation residues of coal or petroleum; from petroleum acid sludge
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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
- Y02P20/00—Technologies relating to chemical industry
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Abstract
The invention discloses high-activity coke and a preparation method thereof. The high-activity coke is prepared by taking blended coal and refined iron powder as raw materials and performing pretreatment and coking steps, wherein the blended coal is 1/3 coking coal and coking coal mixed coal. The method comprises the steps of pretreatment and coking, and specifically comprises the following steps: 1/3, uniformly mixing the coking coal and the coking coal according to a formula ratio to blend coal, and adding water to adjust the water content of the blend coal to 9-12%; adding the iron concentrate powder with the formula ratio into the blended coal, and uniformly mixing to obtain a material a; and (4) coking the material a to obtain the target high-activity coke. The high-activity coke has high reactivity and stable reactive strength, can greatly reduce the temperature of a heat balance zone of the blast furnace, reduce the coke ratio of the blast furnace and realize energy conservation and emission reduction of the blast furnace.
Description
Technical Field
The invention belongs to the technical field of iron making, and particularly relates to high-activity coke and a preparation method thereof.
Background
With the improvement of national requirements on energy conservation and environmental protection in blast furnace iron making, the iron making industry generally considers that the blast furnace urgently needs coke with moderate heat strength and strong activation performance so as to improve the development of indirect reduction degree of the blast furnace, promote the reduction of coke ratio, coal ratio and fuel ratio of the blast furnace, and achieve the purposes of energy conservation and emission reduction in the iron making process. Therefore, it is very necessary to develop a highly active coke.
Disclosure of Invention
A first object of the present invention is to provide a highly active coke; the second purpose is to provide the preparation method of the high-activity coke.
The first purpose of the invention is realized by that the high activity coke is prepared by using blended coal and refined iron powder as raw materials through pretreatment and coking steps, and the blended coal is 1/3 coking coal and coking coal mixed coal.
The second purpose of the invention is realized by the following steps, including pretreatment and coking steps:
A. pretreatment:
1) preparing blended coal: 1/3, uniformly mixing the coking coal and the coking coal according to a formula ratio to blend coal, and adding water to adjust the water content of the blend coal to 9-12%;
2) adding the iron concentrate powder with the formula ratio into the blended coal, and uniformly mixing to obtain a material a;
B. coking: and (4) coking the material a to obtain the target high-activity coke.
The high-activity coke has high reactivity and stable reactive strength, can greatly reduce the temperature of a heat balance zone of the blast furnace, reduce the coke ratio of the blast furnace and realize energy conservation and emission reduction of the blast furnace.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to be limiting in any way, and any modifications or alterations based on the teachings of the present invention are intended to fall within the scope of the present invention.
The high-activity coke is prepared by taking blended coal and refined iron powder as raw materials and performing pretreatment and coking steps, wherein the blended coal is 1/3 coking coal and coking coal mixed coal.
The reactivity of the high-activity coke is more than 35%, and the strength after reaction is more than 55%.
The 1/3 coking coal and coking coal are in a mass ratio of (4-5): (5-6).
The water content of the blended coal is 9-12%.
The addition amount of the fine iron powder is 0.4-0.6% of the mass percentage of the blended coal.
The iron content of the fine iron powder is 50-60%.
The iron content of the fine iron powder is 54 percent.
The preparation method of the high-activity coke comprises the steps of pretreatment and coking, and specifically comprises the following steps:
A. pretreatment:
1) preparing blended coal: blending 1/3 coking coal and coking coal into blended coal according to a formula ratio, and adding water to adjust the water content of the blended coal to 9-12%;
2) adding the iron concentrate powder with the formula ratio into the blended coal, and uniformly mixing to obtain a material a;
B. and (3) coking: and (4) coking the material a to obtain the target high-activity coke.
And in the coking step, the material a is placed in an environment with the temperature of 1200-1300 ℃ at the wall machine side of the coke oven and the temperature of 1300-1350 ℃ at the coke side for coking for 15-25 h.
The coking is to coke the material a for 19-21 hours in an environment with the wall temperature of a coke oven of 1220-1290 ℃ and the coke side temperature of 1310-1340 ℃.
The invention is further illustrated by the following specific examples:
example 1
Firstly, adding water into blended coal (the blending ratio is 1/3 coking coal 45 percent and 55 percent) and uniformly mixing, wherein the water content of the blended coal is 10.5 percent.
Secondly, mixing the blended coal and iron concentrate powder containing 54.00% of iron and 0.5% of the total amount of the blended coal uniformly.
Thirdly, controlling the temperature of the wall of the coke oven to 1230 ℃ at the machine side and 1310 ℃ at the coke side, and carrying out normal coking operation for 21 h. The coke reactivity was 35.50% and the strength after reaction was 61.32%.
Example 2
Firstly, adding water into blended coal (the blending ratio is 1/3 coking coal 40% and 60%) and uniformly mixing, wherein the water content of the blended coal is 9.8%.
Secondly, mixing the blended coal and iron concentrate powder containing iron and 54 percent of 3.0 percent of the total amount of the blended coal uniformly.
Thirdly, controlling the temperature of the wall of the coke oven to be 1250 ℃ at the machine side and 1330 ℃ at the coke side, and carrying out normal coking operation within 20 h. The coke reactivity was 40.50% and the post-reaction strength was 58.37%.
Example 3
Firstly, adding water into blended coal (the blending ratio is 1/3 coking coal 50 percent and 50 percent of coking coal) and uniformly mixing, wherein the water content of the blended coal is 11.6 percent.
Secondly, mixing the blended coal and iron concentrate powder containing iron and 54 percent, which is 1.2 percent of the total amount of the blended coal.
Thirdly, the temperature of the wall of the coke oven is controlled to be 1260 ℃ on the machine side and 1340 ℃ on the coke side, and the coking time is controlled to be 19.5 hours for normal coking operation. The coke reactivity was 37.00% and the post-reaction strength was 60.87%.
Example 4
Firstly, adding water into blended coal (the blending ratio is 1/3 coking coal 45 percent and 55 percent) and uniformly mixing, wherein the water content of the blended coal is 10.1 percent.
Secondly, mixing the blended coal and iron concentrate powder containing iron and 54 percent, wherein the iron concentrate powder is 2.2 percent of the total amount of the blended coal.
Thirdly, controlling the temperature of the wall of the coke oven to be 1280 ℃, and carrying out normal coking operation within 19 hours of coking time. The coke reactivity was 42.50% and the post-reaction strength was 57.74%.
Claims (4)
1. The high-activity coke is characterized by being prepared by taking blended coal and refined iron powder as raw materials and performing pretreatment and coking steps, wherein the blended coal is 1/3 coking coal and mixed coal with a coking coal mass ratio of (4-5) to (5-6), the water content of the blended coal is 9-12%, and the addition amount of the refined iron powder is 0.5%, 1.2%, 2.2% or 3.0% of the mass percent of the blended coal; the preparation method of the high-activity coke comprises the steps of pretreatment and coking, and specifically comprises the following steps:
A. pretreatment:
1) preparing blended coal: blending 1/3 coking coal and coking coal into blended coal according to a formula ratio, and adding water to adjust the water content of the blended coal to 9-12%;
2) adding the iron concentrate powder with the formula ratio into the blended coal, and uniformly mixing to obtain a material a;
B. and (3) coking: and (2) coking the material a, namely, putting the material a in an environment of 1200-1300 ℃ on the wall side of a coke oven and 1300-1350 ℃ on the coke side for coking for 15-25 h to obtain the target high-activity coke, wherein the reactivity of the high-activity coke is more than 35%, and the strength after reaction is more than 55%.
2. The highly active coke according to claim 1, wherein the iron content of the fine iron powder is 50 to 60%.
3. The highly active coke according to claim 1, wherein the iron content of the fine iron powder is 54%.
4. The high activity coke of claim 1, wherein the material a is placed in an environment with a coke oven wall temperature of 1220-1290 ℃ and a coke side temperature of 1310-1340 ℃ for coking for 19-21 h.
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| CN108219807A (en) * | 2016-12-13 | 2018-06-29 | 鞍钢股份有限公司 | Preparation method of biomass iron coke for blast furnace |
| CN108913181A (en) * | 2018-07-19 | 2018-11-30 | 武钢集团昆明钢铁股份有限公司 | A kind of high calcium is burnt and its production method |
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2019
- 2019-07-20 CN CN201910658020.0A patent/CN110272045B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001348576A (en) * | 2000-04-04 | 2001-12-18 | Nippon Steel Corp | Method for producing highly reactive coke for blast furnace |
| JP2004300175A (en) * | 2003-03-28 | 2004-10-28 | Nippon Steel Corp | Manufacturing method of highly reactive molded coke for blast furnace |
| CN102453490A (en) * | 2010-10-22 | 2012-05-16 | 宝山钢铁股份有限公司 | Coal blending method for preparing high-activity high-strength coke |
| CN102719264A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | High-reactivity coke and production method thereof |
| CN102851049A (en) * | 2011-06-27 | 2013-01-02 | 宝山钢铁股份有限公司 | Coal blending method for high-reactivity coke for blast furnace |
| CN103468287A (en) * | 2013-09-22 | 2013-12-25 | 重庆大学 | Preparation method of high strength-hyper reactivity iron containing coke |
| KR101657402B1 (en) * | 2015-03-26 | 2016-09-13 | 현대제철 주식회사 | High reactivity and high strength coke for blast furnace and method of producing the same |
| CN107709523A (en) * | 2015-06-24 | 2018-02-16 | 杰富意钢铁株式会社 | The manufacture method of iron coke |
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