Coking coal blending method of wide carbonization chamber coke oven

A carbonization chamber and coking coal technology, applied in coking ovens, petroleum industry, etc., can solve problems such as insufficient mixing of blended coal, poor high-temperature fluidity of blended coal, and accelerated graphite formation on the top of the furnace, so as to avoid The effect of normal production, reducing the workload of graphite removal and stabilizing coke quality

Active Publication Date: 2013-06-12
武汉钢铁有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the temperature rise rate of the 7.63-meter coke oven is about 26% slower than that of the traditional 6-meter coke oven during the carbonization of indoor coal materials, especially the coking process of the coal material in the center of the carbonization chamber, continue to carry out coal blending and coking according to the coking coal blending method of the 6-meter coke oven. Then the high-temperature fluidity of the blended coal will be significantly worse, so that the blended coal cannot be fully mixed among different coal types during the heating and coking process, and coke with uniform quality cannot be obtained.
In addition, when the volatile content of

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  • Coking coal blending method of wide carbonization chamber coke oven

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Effect test

Embodiment 1

[0029] A coking coal blending method for a coke oven with a wide carbonization chamber, including the step of mixing individual coking coals, the weight percentage of each individual coking coal is: lean coal: 10%; lean coal: 8%; Fat coal 1#: 15%; 1 / 3 coking coal: 20%; coking coal 1#: 15%; coking coal 2#: 15%; coking coal 3#: 5%; gas fat coal: 8%; daf is 31%, G value is 70): 4%;

[0030] And the maximum Gibbs fluidity of blended coal is controlled at 1000-1200ddpm, and the volatile content is controlled at 24-27%.

[0031] According to this method of coal blending, the CSR of the obtained coke is ≥ 66%, and the daily output of coke in a 7.63-meter coke oven is 171,600 to 176,700 tons / 2 units. In addition to graphite workload and protection of the coke oven top furnace wall.

Embodiment 2

[0033] A coking coal blending method for a coke oven with a wide carbonization chamber, including the step of mixing individual coking coals, the weight percentage of each individual coking coal is: lean coal: 20%; fat coal 1#: 10% ; 1 / 3 coking coal: 26%; Coking coal 1#: 15%; Coking coal 2#: 12%; Coking coal 3#: 6%; Gas fat coal: 3%; V daf is 31%, and the cohesion index G value is 70): 3%;

[0034] And the maximum Gibbs fluidity of blended coal is controlled at 600-1400ddpm, and the volatile content is controlled at 24-27%.

[0035] According to this method of coal blending, the CSR of the obtained coke is ≥ 66%, and the daily output of coke in a 7.63-meter coke oven is 171,600 to 176,700 tons / 2 units. In addition to graphite workload and protection of the coke oven top furnace wall.

Embodiment 3

[0037] A coking coal blending method for a coke oven with a wide carbonization chamber, including the step of mixing individual coking coals, the weight percentages of the individual coking coals are: lean coal: 18%; fat coal 1#: 12% ; 1 / 3 coking coal: 20%; coking coal 1#: 18%; coking coal 2#: 11%; coking coal 3#: 8%; fat coal 2#: 7%; daf is 31%, and the cohesion index G value is 75): 6%;

[0038] And the maximum Gibbs fluidity of blended coal is controlled at 600-1400ddpm, and the volatile fraction is controlled at 24-27%.

[0039] According to this method of coal blending, the CSR of the obtained coke is ≥ 66%, and the daily output of coke in a 7.63-meter coke oven is 171,600 to 176,700 tons / 2 units. In addition to graphite workload and protection of the coke oven top furnace wall.

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Abstract

The invention discloses a coking coal blending method of a wide carbonization chamber coke oven. The method comprises a step of blending various single coking coals, wherein each single coking coal comprises the following components in percentage by weight: 16-25% of lean coal and meager lean coal, 10-20% of fat coal 1#, 17-29% of 1/3 coking coal, 15-20% of coking coal 1#, 6-20% of coking coal 2#, 5-10% of coking coal 3#, 6-10% of gas-fat coal and fat coal 2# and the balance of other random available coking coal of which the volatile component content Vdaf is less than or equal to 35%; the maximum Gieseler fluidity of the compound coal is 600-1,400ddpm; and the volatile components account for 24-27%. The method disclosed by the invention effectively reduces the coal preparation cost, overcomes adverse impact on the high-temperature flowing property of the coking coal caused by the heating speed reduction in a coking process of the wide carbonization chamber coke oven, effectively reduces the graphite accumulation speed on the oven top and improves the coke quality and the coke output.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and coking, and in particular relates to a coking coal blending method for coke ovens with wide carbonization chambers. Background technique [0002] Due to the influence of coking coal resource procurement channels, and in order to stabilize the quality of coke, coking enterprises generally do not make significant adjustments to the use ratio of gas coal, gas fat coal, fat coal, 1 / 3 coking coal, coking coal and lean coal. Adjustment. Traditional coal blending technology uses a large proportion of coking coal in order to produce high-quality coke, and the blending ratio of coking coal is as high as 60%. Lean coal and lean coal have poor cohesiveness and basically do not have high-temperature flow properties, so the blending ratio in coking coal blending is relatively low ( generally less than 8%) or not even used. [0003] The 7.63-meter coke oven is a super-large coke oven with a wide carbon...

Claims

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Application Information

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IPC IPC(8): C10B57/04
Inventor 鲍俊芳张雪红盛军波薛改凤宋子逵崔会明魏编项茹陈鹏刘向勇谢传斌詹立志任玉明张前香陈细涛万基才
Owner 武汉钢铁有限公司
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