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A method for controlling the fineness of blended coal

A technology of blending coal and fineness, applied in the field of coking of iron and steel metallurgy, can solve the problems of increasing coking speed difference, low stack specific gravity, high energy consumption, etc., and achieve the effects of stable quality, reduced energy consumption, and improved accuracy

Active Publication Date: 2020-11-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many types of coal used in coking, and the application of coal blending technology can not only ensure the quality of coke, but also make reasonable use of coal resources, save high-quality coking coal, and expand coking coal resources; however, if the blending coal fineness is too high, the belt transportation volume will be reduced , increase the operating cost of the crushing process, destroy the colloidal layer of coal, increase the amount of smoke and dust escape during coal charging, and have a low pile specific gravity, which is not conducive to increasing the amount of coal loaded and stabilizing the quality of coke
If the blending coal fineness is too low, segregation will easily occur during the coal charging process, and the melting and softening rate of large particle coal will be reduced during the coking process, which will increase the difference in coking speed between different coal materials, and cracks will easily occur in the coke; in the coking process, it is necessary to adjust The fineness of the coal is adjusted. At present, all single coals are mixed first, and then the fineness of the blended coal is adjusted by crushing; however, the fineness of the blended coal formed by this method is difficult to meet the requirements, and in the crushing process high energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment is a method for regulating the fineness of blended coal. According to the different requirements of the fineness of blended coal, the method for regulating the fineness of blended coal selects a corresponding regulation method. The regulation method includes:

[0035] When the blending coal fineness requirement is 50%-60%, mix the individual coals in the blending coal;

[0036] When the fineness of the mixed coal is required to be 60%-65%, the gas coal in the mixed coal is pre-crushed to a fineness of 65%-85%, and then the pre-crushed gas coal is mixed with the remaining single coal;

[0037] When the blended coal fineness requirement is 65%-71%, the lean coal and gas coal in the blended coal are pre-crushed to a fineness of 65%-85%, and then the pre-crushed lean coal and gas coal are combined with the remaining single coal mix;

[0038] When the blended coal fineness requirement is 71%-82%, the lean coal and gas coal in the blended coal are pre-crushed...

Embodiment 2

[0042] 1. Mixed coal

[0043] The above blended coal includes the following coal types by weight: 15 parts of lean coal, 5 parts of gas coal, 30 parts of coking coal, and 50 parts of 1 / 3 coking coal; wherein,

[0044] Lean coal consists of 10 shares of Shanxi lean coal and 5 shares of Guizhou lean coal;

[0045] Gas coal is Shaanxi gas coal;

[0046] Coking coal consists of 15 parts of Shanxi coking coal and 15 parts of Sichuan coking coal;

[0047] The 1 / 3 coking coal consists of 20 parts of Qinghai 1 / 3 coking coal and 30 parts of Guizhou 1 / 3 coking coal.

[0048] 2. Control method of coal fineness

[0049] When the above-mentioned blending coal fineness requirement is 70%; correspondingly select the blending coal fineness control method in embodiment 1: Shanxi lean coal, Guizhou lean coal and Shaanxi gas coal are respectively pre-crushed to a fineness of 71%, and then Shanxi lean coal, Guizhou lean coal and Shaanxi gas coal can be mixed with the remaining single coal.

[...

Embodiment 3

[0052] 1. Mixed coal

[0053] The above blended coal includes the following coal types by weight: 20 parts of gas coal, 30 parts of coking coal, and 50 parts of 1 / 3 coking coal; wherein, the gas coal is composed of 10 parts of Shaanxi gas coal and 10 parts of Shanxi gas coal;

[0054] Coking coal consists of 25 parts of Shanxi coking coal and 5 parts of Guizhou coking coal;

[0055] The 1 / 3 coking coal consists of 45 shares of Panjiang 1 / 3 coking coal and 5 shares of Chongqing 1 / 3 coking coal.

[0056] 2. Control method of coal fineness

[0057] When the above-mentioned blending coal fineness requirement is 80%; correspondingly select the blending coal fineness control method in Example 1: pre-crushing Shaanxi gas coal and Shanxi gas coal to a fineness of 65% respectively, and pre-crushing Shaanxi gas coal and Shanxi gas coal, Shanxi coking coal, Guizhou coking coal, Panjiang 1 / 3 coking coal and Sichuan-Chongqing 1 / 3 coking coal are mixed and put into PFCK1825 reversible ham...

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PUM

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Abstract

The invention relates to a coking blended coal fineness adjusting and controlling method. Corresponding adjusting and controlling methods are selected according to different requirements of blended coal fineness, the qualification rate of the blended coal fineness can be increased, and coke quality is stabilized. Besides, the adjusting and controlling accuracy of the blended coal fineness is further improved, so that energy consumption can be remarkably reduced in the adjusting and controlling process of the blended coal fineness.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy coking, in particular to a method for controlling the fineness of mixed coal. Background technique [0002] Coking generally refers to the process of carbonization and zooming of organic substances. In the dry distillation of coal, it refers to high-temperature dry distillation, which uses coal as raw material and heats it to about 950°C under air-isolated conditions to produce coke through high-temperature dry distillation, and at the same time obtain gas, coal tar and recover other chemical products. A coal conversion process; coke Its main purpose is ironmaking, and a small amount is used as chemical raw material to make calcium carbide, electrodes, etc. [0003] There are many types of coal used in coking, and the application of coal blending technology can not only ensure the quality of coke, but also make reasonable use of coal resources, save high-quality coking coal, and expand co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B57/00
CPCC10B57/00
Inventor 黄先佑于秀芳舒文东
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP