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A kind of method of improving coke wear-resisting strength

A wear-resistant strength and coke technology, which is applied in the field of coal chemical industry, can solve the problems of coke quality that cannot meet the use requirements, large shrinkage, and high volatile content, and achieve the effects of reducing coal blending costs, improving wear-resistant strength, and expanding utilization.

Active Publication Date: 2021-12-14
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its use of a large proportion of 1 / 3 coking coal with high volatile content and a certain amount of gas coal, the volatile content of the blended coal will be very high, basically above 30%, and the shrinkage of the blended coal will be large, and the coke will be cold and hot. not very high
The quality of its coke cannot meet the use requirements of 4000m3 level and above large blast furnaces
[0006] Generally speaking, there is no method that can effectively improve the wear resistance of coke.

Method used

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  • A kind of method of improving coke wear-resisting strength
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  • A kind of method of improving coke wear-resisting strength

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Effect test

Embodiment 1

[0057] What this embodiment adopts is 7.63m coke oven. The process of this embodiment is as follows:

[0058] (1) Mix 50wt% of coking coal, 15wt% of transitional fat coal, 10wt% of fat coal, 1 / 3 of coking coal 10wt%, and 15wt% of lean coal to obtain blending coal. Blending coal index: V of blending coal daf is 23.6%, the caking index G value of the blended coal is 78, and the blended coal moisture is 9.3wt%.

[0059] (2) Coking, coking heating system: the coking time is 31.5h, and the standard temperature is 1265°C. The coke quenching method is dry coke quenching.

[0060] The coke strength obtained in this embodiment is: crushing strength M 40 The value is 89.8%, the abrasion resistance M 10 The value is 4.7%.

Embodiment 2

[0062] What this embodiment adopts is 7.63m coke oven. The process of this embodiment is as follows:

[0063] (1) Mix 55wt% of coking coal, 15wt% of transitional fat coal, 5wt% of fat coal, 1 / 3 of coking coal 10wt%, and 15wt% of lean coal to obtain blending coal. Blending coal index: V of blending coal daf is 23.2%, the caking index G value of the blended coal is 78, and the blended coal moisture is 9.4wt%.

[0064] (2) Coking, coking heating system: the coking time is 30.5h, and the standard temperature is 1275°C. The coke quenching method is dry coke quenching.

[0065] The coke strength obtained in this embodiment is: crushing strength M 40 The value is 89.9%, the abrasion resistance M 10 The value is 4.7%.

Embodiment 3

[0067] What this embodiment adopts is 7.63m coke oven. The process of this embodiment is as follows:

[0068] (1) Mix 52wt% coking coal, 17wt% transitional fat coal, 8wt% fat coal, 1 / 3 coking coal 9wt%, and 14wt% lean coal to obtain blended coal. Blended coal index: V of blended coal daf is 23.4%, the caking index G value of the blended coal is 78, and the blended coal moisture is 9.2wt%.

[0069] (2) Coking, coking heating system: the coking time is 29.5h, and the standard temperature is 1285°C. The coke quenching method is dry coke quenching.

[0070] The coke strength obtained in this embodiment is: crushing strength M 40 The value is 89.6%, the abrasion resistance M 10 The value is 4.8%.

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Abstract

The invention provides a method for improving the wear resistance strength of coke, comprising: 10-15wt% of lean coal, 5-10wt% of 1 / 3 coking coal, 15-20wt% of transitional fat coal, 5-10wt% of fat coal and coking coal 50-55 wt% is mixed to obtain blended coal; the blended coal is used to smelt coke. Adopting the method of the present invention can significantly improve coke abrasion resistance M 10 , capable of 4000m 3 Blast furnaces above and above provide coke with high wear resistance, creating conditions for large blast furnaces to reduce the coke ratio. At the same time, it also expands the utilization rate of coking coal resources and reduces the cost of coal blending.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a method for improving the wear resistance of coke. Background technique [0002] In recent years, with the rapid development of my country's coking industry, the demand for high-quality coking coal resources is increasing day by day, but the high-quality coking coal resources are increasingly in short supply, which makes the price of high-quality coking coal resources continue to rise, and the coal blending costs of coking enterprises continue to rise . At the same time, at 4350m 3 blast furnace and 5500m 3 A batch of large-scale blast furnaces represented by blast furnaces have been put into operation one after another in China. Large-scale blast furnaces put forward higher requirements for the quality of coke, especially the wear-resistant strength of coke M 10 . Coke abrasion resistance M 10 It reflects the ability of coke to resist external friction withou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B57/04C10B53/08C10B1/00C10B57/16
CPCC10B57/04C10B53/08C10B1/00C10B57/16
Inventor 贺佳史永林李昊堃刘文文赵建伟张春亮李波
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD