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A control method for blending coal particle size

A technology that combines coal and particle size, used in special forms of dry distillation, coke ovens, petroleum industry, etc., can solve the problems of extensive coal particle size, high energy consumption, and difference in coke quality. The effect of improving the quality of coal into the furnace

Active Publication Date: 2021-06-29
河北中煤旭阳能源有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size control of the furnace coal formed by this process is relatively extensive, because the particle size composition of the furnace coal with the same fineness is very different, and the quality of the coke produced will also vary greatly.
Moreover, the energy consumption in the crushing process is relatively high
[0005] For the control of the particle size of a single coal, it is proposed in the industry that differentiated treatment is required. It is generally believed that "the inert component should be finely pulverized, and the active component should be relatively coarsely pulverized." Research [J]. Wuhan Iron and Steel Technology, 2014, 52 (3)), Chen Junan (coking coal particle size adjustment technology [J]. Clean coal technology, 2012, 18 (5)), Zhang Xuehong (research on fine grinding of lean coal [J] ]. Fuel and Chemical Industry, 2010, 41(2)), Xiang Ru (Comparison of coal blending and coking with different particle size gas coal and lean coal [J]. Coal Transformation, 2010, 33(3)) etc. Research experiments on the influence of coal particle size on coke quality, but only one or two coal types, not all coking coals were analyzed

Method used

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  • A control method for blending coal particle size
  • A control method for blending coal particle size

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] combine figure 1 One embodiment of the invention is shown where the particle size modulation method is performed on only a portion of the coal. The first coking experiment was designed, and a 40kg small coke oven test was carried out by using the tamping process.

[0066] Table 3 shows the performance indicators of various coal types and specific coal blending schemes.

[0067] coal type A d / ％

V daf / ％

S t，d / ％

G value Y value / mm Original fineness / % HGI / % Proportion / % Fat coal 1 11.6 31.7 1.68 98 29 76.8 93 Fat coal 2 11.8 26.2 0.57 95 24 53.2 94 12 Gas fat coal 8.5 37.7 1.85 93 23 40.7 57 20 1 / 3 coke 1 9.3 36.1 0.52 91 19 58.6 60 coking coal 1 10.0 24.8 0.54 85 22 75.3 92 11 1 / 3 coke 2 8.6 37.0 0.48 78 14 56.7 65 15 coking coal 2 11.5 26.4 0.67 76 14 64.9 94 15 gas coal 8.8 38.1 0.56 70 11 50.3 55 lean coking coal 11.7 15.9 0...

Embodiment 2

[0076] combine figure 1 One embodiment of the invention is shown where the particle size modulation method is performed on only a portion of the coal. Design the second coking experiment, and use the top-loading process to conduct a 40kg small coke oven test.

[0077] The performance indicators and specific coal blending schemes of various coal types are shown in Table 3.

[0078] (1) According to the requirement of coal blending ratio, as well as G value, HGI (Hardwell Grindability Index) and original fineness data, it is determined that fat coal 2 and gas fat coal are hard-to-grind or coarse-grained coal in strong caking coal, and they are First dry to 6% moisture, and then sieve with 0.2mm sieve, and then send the sieved coal ≥ 0.2mm to the pre-grinding equipment for ultra-fine grinding, the particle size is <0.5mm, of which <0.2mm coal accounts for 73%;

[0079] (2) Determine that 1 / 3 of the coking coal 2 is medium coking coal, hard to grind or coarse coal, first dry i...

Embodiment 3

[0086] combine figure 2 One embodiment of the invention is shown performing the particle size modulation method on all coals. Design the third coking experiment, using the tamping process to conduct a 40kg small coke oven test.

[0087] Table 4 shows the performance indicators of various coal types and specific coal blending schemes.

[0088] coal type A d / ％

V daf / ％

S t，d / ％

G value Y value / mm Original fineness / % HGI / % Proportion % Fat coal 1 11.6 31.7 1.68 98 29 76.8 93 10 Fat coal 2 11.8 26.2 0.57 95 24 53.2 94 Gas fat coal 8.5 37.7 1.85 93 23 40.7 57 14 1 / 3 coke 1 9.3 36.1 0.52 91 19 58.6 60 coking coal 1 10.0 24.8 0.54 85 22 75.3 92 22 1 / 3 coke 2 8.6 37.0 0.48 83 14 56.7 65 coking coal 2 11.5 26.4 0.67 76 14 64.9 94 7 gas coal 8.8 38.1 0.56 70 11 50.3 55 16 lean coking coal 11.7 15.9 0.59 60 9 68.2 86 15 lean coal 9.9 ...

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Abstract

The invention relates to a method for regulating the particle size of blended coal, which includes the step of screening at least one coal used for preparing blended coal to remove the part of <0.2mm. The method can obviously reduce the ash and sulfur content of each single coal, and increase the G value. In addition, the blended coal particle size control method may also include the steps of precisely controlling the particle size composition of a single coal through a reasonable grouping and crushing process, and processing the coal components of a specific particle size, so that the fineness and particle size of the coal into the furnace can be controlled. Composition to achieve the best particle size regulation method. Therefore, under the same coking coal resource conditions, through the adjustment of coal particle size, the quality of blended coal can be improved, and the quality of coke can be improved; or the consumption of high-priced medium-strong caking coal resources can be reduced under the condition of producing coke with the same quality, and coal blending can be reduced. costs and increase profits. The invention also relates to a coking production method including the method for controlling the particle size of blended coal.

Description

technical field [0001] The invention belongs to the field of coking in the coking industry, and in particular relates to a method for regulating and controlling the particle size of mixed coal and a coking production method comprising the same. Background technique [0002] In order to improve the quality of coke, a series of coking coal pretreatment technologies have been developed at home and abroad and used in actual production, such as tamping coking, coal blending and moisture adjustment of coal into the furnace. Bulk density to improve coke quality. [0003] In addition, in order to ensure the quality of coke, one of the most basic requirements for selecting coal for coking is to ensure the lowest possible ash and sulfur content. [0004] The fineness and particle size composition of coal have a great influence on the bulk density. Studies have shown that optimizing the fineness of blended coal can improve the caking ability of blended coal, thereby improving the qua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/04C10B57/00C10B57/10
CPCC10B53/04C10B57/00C10B57/10
Inventor 任华伟杨洪庆李建莉郎莹杨磊王华东马春雁王硕张寸暖孙振满
Owner 河北中煤旭阳能源有限公司