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Gas-fat-doped coking and coal blending method

A technology for gas-fertilized coal and coal blending, which is used in coke ovens, petroleum industries, etc., can solve the problems of low colloid expansion, poor colloid quality, and insufficient fluidity, and achieves lower coal blending costs and higher coke costs. quality effect

Active Publication Date: 2012-12-05
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Some gas-fertilized coals are rich in colloidal bodies, and the colloidal bodies have high expansion and good fluidity, which is biased towards the properties of fat coals; although some gas-fertilized coals have colloidal bodies that meet the classification standards of gas-fertilized coals, the colloidal body expansion degree Low, insufficient fluidity, poor colloidal quality, and its coal quality tends to be gas-coal
Therefore, without further analyzing the coal quality characteristics of gas-fertilized coal and improving the coal blending method accordingly, just mechanically blending coal and coking according to experience will greatly affect the quality and stability of coke

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] In this embodiment, the value of the Oya expansion degree b of Gas Fertilizer Coal 1# is 202%, and the maximum fluidity MF is 99912ddpm, and the value of Oya expansion degree b of Gas Fertilizer Coal 2# is 78%, and the maximum fluidity MF is 58668ddpm , and the coal quality of each single coking coal used meets the classification indicators in the corresponding national standards. The mass percentages of each coal type are as follows:

[0010] Gas fat coal 1#: 7%; fat coal 12%; 1 / 3 coking coal: 21%; gas fat coal 2#: 3%; coking coal: 44%; lean coal: 13%. The quality indicators of blended coal are: 27.07% volatile matter, 9.60% ash content, 6.8% Aoya swelling degree b value, and 382°C softening temperature.

[0011] Coal blending is carried out according to the above coking coal blending method, and coking is carried out in a coke oven above 4m. The strength of the produced coke can reach: crushing strength M40≥80%, M10≤7.0%, reactivity (CRI)≤28.0%, after reaction Stren...

Embodiment 2

[0013] In the present embodiment, the value of the expansion degree b of gas fertilizer coal 1# is 132%, and the maximum fluidity MF is 96564ddpm; the value of the expansion degree b of gas fertilizer coal 2# is 92%, and the maximum fluidity MF is 33606ddpm , and the coal quality of each single coking coal used meets the classification indicators in the corresponding national standards. The mass percentages of each coal type are as follows:

[0014] Gas fat coal 1#: 5%; fat coal 10%; 1 / 3 coking coal: 28%; gas fat coal 2#: 5%; coking coal: 38%; lean coal: 14%. The quality indicators of blended coal are: 27.38% volatile matter, 9.56% ash content, -5.7% Aoya swelling degree b value, and 377°C softening temperature.

[0015] Coal blending is carried out according to the above coking coal blending method, and coking is carried out in a coke oven above 4m. The strength of the produced coke can reach: crushing strength M40≥80%, M10≤7.0%, reactivity (CRI)≤28.0%, after reaction Stren...

Embodiment 3

[0017] In this embodiment, the value of the Oya expansion degree b of Gas Fertilizer Coal 1# is 159%, and the maximum fluidity MF is 64392ddpm. , and the coal quality of each single coking coal used meets the classification indicators in the corresponding national standards. The mass percentages of each coal type are as follows:

[0018] Gas fat coal 1#: 8%; fat coal 10%; 1 / 3 coking coal: 26%; gas fat coal 2#: 3%; coking coal: 41%; lean coal: 12%. The quality indicators of blended coal are: 27.56% volatile matter, 9.57% ash content, -4.6% Aoya swelling degree b value, and 378°C softening temperature.

[0019] Coal blending is carried out according to the above coking coal blending method, and coking is carried out in a coke oven above 4m. The strength of the produced coke can reach: crushing strength M40≥80%, M10≤7.0%, reactivity (CRI)≤28.0%, after reaction Strength (CSR) ≥ 62.0%.

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Abstract

The invention discloses a gas-fat-doped coking and coal blending method. The gas-fat-doped coking and coal blending method comprises the following steps: firstly, determining the Giseeler fluidity of gas-fat coal to obtain a maximum fluidity MF, and determining a Hoya expansion value b; marking the gas-fat coal with the Hoya expansion value b being greater than 150 percent or the maximum fluidity MF being greater than 70000ddpm as No.1 gas-fat coal; marking gas-fat coal with the Hoya expansion value b being not greater than 150 percent or the maximum fluidity MF being not greater than 70000ddpm as No.2 gas-fat coal; then blending the gat-fat coal according to the following mass percentage: 5-10 percent of No.1 coal, 0-15 percent of fat coal, 20-30 percent of coking coal, 0-5 percent of No.2 gas-fat coal, 35-45 percent of coaling coal and 10-15 percent of lean coal; and enabling the mass standard of the blending coal to meet the conditions that the volatile component is 26-28 percent, the ash content is less than 10 percent, the Hoya expansion value b is -6 to 10 percent and the softening temperature is 375-385DEG C. The coal blending and coking can be carried out according to the gas-fat-doped coking and coal blending method, so that the quality of coke can be effectively improved, the coat blending cost is reduced and the strength of the coke obtained by coking is high.

Description

technical field [0001] The invention belongs to the technical field of coking coal blending, and in particular relates to a coking coal blending method involving gas-fertilized coal. Background technique [0002] Gas fat coal is a kind of bituminous coal, and its classification standard takes volatile matter and gelatinous layer index as the main index, and Aurora swelling degree as the auxiliary index. Due to different mining sites, different coal seams, and different stacking times in coal yards, the quality of each gas-fertilized coal varies greatly. Some gas-fertilized coals are rich in colloidal bodies, and the colloidal bodies have high expansion and good fluidity, which is biased towards the properties of fat coals; although some gas-fertilized coals have colloidal bodies that meet the classification standards of gas-fertilized coals, the colloidal body expansion degree Low, insufficient fluidity, poor colloidal quality, and its coal quality tends to be gas-coal. Th...

Claims

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Application Information

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IPC IPC(8): C10B57/04
Inventor 张雪红薛改凤项茹宋子逵鲍俊芳陈鹏任玉明詹立志张前香
Owner 武汉钢铁有限公司
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