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Method for high-volatile fat coal to participate in coking and blending coal

A technology of high volatile and fat coal, applied in coking ovens, petroleum industry, etc., can solve problems such as high volatile content, ignoring utilization, and reducing the amount of fat coal

Active Publication Date: 2012-12-19
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High volatile fat coal (V daf ≥34%) high volatile content, rich in colloids, coke-forming structure is dominated by fine-grained mosaic structure, sometimes accompanied by partial isotropic structure. In production and distribution, coking enterprises pay attention to the shortcomings of high volatile content and ignore In order to avoid the utilization of its rich colloids, the high-volatility fat coal resources are limited in coking coal blending, which virtually reduces the amount of fat coal available in my country's coking coal resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Determination of V daf Based on the Gibsonian fluidity and Auya expansion b value of ≥34% high-volatile fat coal, the Auya expansion b value is 202%, the maximum fluidity MF is 65508ddpm, and the solid-soft interval is 105°C, so it is recorded as Fatty coal 1#; then fat coal 1# is blended according to the following mass percentages: fat coal 1#: 15%, 1 / 3 coking coal: 33%, coking coal: 40%, lean coal: 12%; The quality index meets: volatile matter 26~28%, ash content<10%, Aurya expansion b value -6~10%, softening temperature 375~385℃.

[0011] According to the above coking coal blending method for coal blending and coking, cheap high-volatile fat coal can be directly used instead of high-quality fat coal, which greatly reduces the cost of coal blending. Coking in a coke oven above 4m, the strength of the coke produced can reach: crushing strength M40 ≥ 80%, M10 ≤ 7.0%, reactivity (CRI) ≤ 28.0%, post-reaction strength (CSR) ≥ 62.0%.

Embodiment 2

[0013] Determination of V daf Based on the Giraffel fluidity and Auya swelling degree b value of high volatile fat coal ≥34%, the Auya swelling degree b value is 111%, the maximum fluidity MF is 39258ddpm, and the solid-soft interval is 102°C, so it is recorded as Fat coal 2#; then fat coal 2# is blended according to the following mass percentages: fat coal 2#: 5%, fat coal 3#: 10%, 1 / 3 coking coal: 25%, coking coal: 45%, lean coal: 15%; and make the quality index of blended coal meet: volatile matter 26~28%, ash contentdaf <34% fat coal, and the coal quality of other single coking coals used meet the classification indicators in the corresponding national standards.

[0014] Coal blending and coking can be carried out according to the above coking coal blending method, and 1 / 3 of the coking coal can be replaced by cheap high-volatile fat coal, so as to rationally use coal resources, optimize coal blending methods, and stabilize coke quality. Coking in a coke oven above 4m, t...

Embodiment 3

[0016] Determination of V daf Based on the Gibson's fluidity and Auya expansion b value of ≥34% high-volatile fat coal, the Auya expansion b value is 119%, the maximum fluidity MF is 51336ddpm, and the solid-soft interval is 101°C, so it is recorded as Fat coal 2#; then fat coal 2# is blended according to the following mass percentages: fat coal 2#: 7%, fat coal 3#: 12%, 1 / 3 coking coal: 25%, coking coal: 43%, lean coal: 13%; and make the quality index of blended coal meet: volatile matter 26~28%, ash contentdaf <34% fat coal, and the coal quality of other single coking coals used meet the classification indicators in the corresponding national standards.

[0017] According to the above coking coal blending method for coal blending and coking, cheap high-volatile fat coal can be used to replace gas coal, so as to rationally use coal resources, optimize coal blending methods, and stabilize coke quality. Coking in a coke oven above 4m, the strength of the coke produced can reac...

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Abstract

The invention discloses a method for a high-volatile fat coal to participate in coking and blending coal with Vdaf greater than or equal to 34%, the method determines Gieseler fluidity of the high-volatile fat coal and Audiberts-Arnu dilatation b value; the high-volatile fat coal which is characterized in that the Audiberts-Arnu dilatation b value is greater than 120%, the maximum fluidity MF is greater than 50000ddpm, the solid soft region is greater than 100 DEG C is taken as a fat coal 1#, the high-volatile fat coal which is characterized in that the above index can not be satisfied is taken as a fat coal 2#; the fat coal 1# and the fat coal 2# are respectively used for high-quality fat coal, gas coal or 1 / 3 coking coal, the quality index of the mixed coal is satisfied by 26-28% of volatile component, less than 10% of ash content, -6-10% of Audiberts-Arnu dilatation b value and 375-385 DEG C of the softening temperature. The coal blending and coking are carried out according to the method of the invention, the coke quality can be effectively enhanced, the coal blending cost is reduced, and the coke intensity through 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 high volatile fat coal. Background technique [0002] Fatty coal is a scarce resource in coking in my country. All domestic coking top-loading coke ovens are equipped with fat coal in the coking coal blending structure, and the blending amount is mostly around 15%, or even 20%. With the mining and application of fat coal resources, fat coal resources are increasingly scarce, and the price is comparable to that of coking coal. High volatile fat coal (V daf ≥34%) high volatile content, rich in colloids, coke-forming structure is dominated by fine-grained mosaic structure, sometimes accompanied by partial isotropic structure. In production and distribution, coking enterprises pay attention to the shortcomings of high volatile content and ignore In order to avoid the utilization of its rich colloids, the high-volatilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/04
Inventor 张雪红薛改凤宋子逵项茹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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