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Online coking coal blending regulation and control method

A coal blending and coal blending technology, applied in solid fuel, petroleum industry, fuel, etc., can solve problems such as uneven coking coal blending, achieve the effects of reducing the risk of coal segregation, precise coking coal blending, and avoiding excessive crushing

Active Publication Date: 2022-06-24
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003]The purpose of the present invention is to provide an online coking coal blending control method for the actual production situation where the coking coal quality index mainly depends on the particle size of incoming coal. On the basis of excessive pulverization of incoming coal, the refined and precise application of a large proportion of weakly cohesive coal can be realized, and the problem of uneven coking coal blending can be solved, thereby improving coke quality

Method used

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  • Online coking coal blending regulation and control method
  • Online coking coal blending regulation and control method
  • Online coking coal blending regulation and control method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A method for coking and blending of weakly cohesive coal based on the particle size of coal powder is characterized in that: figure 1 shown.

[0027] 1) Coal blending: the weakly caking coal with Rmax 1.6 is lean coal and lean coking coal, 1.2 < Rmax≤1.6 coking coal and 0.9≤Rmax≤1.2 fat coal are blended according to the proportions in Table 1;

[0028] Table 1 Proportion of various coal types

[0029]

[0030] 2) Grain size division: Taking 6mm and 1mm grain size as the screening limit, the blended coal is divided into 3 grain size ranges after continuous screening: ①>6mm large particles, accounting for 38%; ②1-6mm moderate particles, accounting for 18% ; ③ Small particles less than 1mm account for 44%;

[0031] 3) Treatment of large particle coal powder: the large particles > 6 mm in step 2) are pulverized with coal, and after pulverization, sieve with a sieve with an aperture of Xi = 3 mm to obtain the under-sieve and over-sieve respectively; the bond index of ...

Embodiment 2

[0038] A method for coking and blending of weakly cohesive coal based on the particle size of coal powder is characterized in that: figure 1 shown.

[0039] 1) Coal blending: the weakly caking coal with Rmax 1.6 is lean coal and lean coking coal, 1.2 < Rmax≤1.6 coking coal and 0.9≤Rmax≤1.2 fat coal are blended according to the proportions in Table 2;

[0040] Table 2 Proportion of various coal types

[0041]

[0042] 2) Grain size division: Taking 6mm and 1mm grain size as the screening limit, the blended coal is divided into 3 grain size ranges after continuous screening: ①>6mm large particles, accounting for 27%; ②1-6mm moderate particles, accounting for 55% ;③<1mm small particles, accounting for 18%;

[0043] 3) Treatment of large-particle pulverized coal: pulverize the large particles > 6 mm in step 2 with coal, and sieve with a sieve with an aperture of Xi = 3 mm after pulverization to obtain the under-sieve and over-sieve material respectively; The setting condit...

Embodiment 3

[0050] A method for coking and blending of weakly cohesive coal based on the particle size of coal powder is characterized in that: figure 1 shown.

[0051] 1) Coal blending: the weakly caking coal with Rmax 1.6 is lean coal and lean coking coal, 1.2 < Rmax≤1.6 coking coal and 0.9≤Rmax≤1.2 fat coal are blended according to the proportions in Table 3;

[0052] Table 3 Proportions of various coal types

[0053]

[0054] 2) Grain size division: With 10mm and 0.5mm grain size as the screening limit, the blended coal is divided into 3 grain size ranges after continuous screening: ①>10mm large particles, accounting for 17%; ②0.5-10mm moderate particles, accounting for than 53%; ③<0.5mm small particles account for 30%;

[0055] 3) Large particle coal powder treatment: pulverize the mixed coal with medium and large particles > 10 mm in step 2), sieve with a sieve with an aperture of Xi=5 mm after pulverization, and obtain the under-sieve and over-sieve material respectively; a...

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Abstract

The invention discloses an on-line coking coal blending regulation and control method, which comprises the following steps of: aiming at the actual production condition that the property indexes of coking coals mainly including coal particle sizes continuously fluctuate, mixing various coking coals into blended coals according to the vitrinite reflectance; two granularities M1 and M2 are determined as screening boundaries and are partitioned; respectively treating and mixing large-particle coal powder, moderate-particle coal powder and small-particle coal powder, and finally mixing and outputting; carrying out active-inert ratio detection and treatment on the mixed coal output by final mixing until the active-inert ratio is greater than or equal to 3.0; and detecting a vitrinite reflectivity distribution diagram until the blended coal is in normal distribution and has no notch. According to the method, the particle size fluctuation of the supplied coal is effectively dealt with, excessive crushing and coal segregation of the coking coal are avoided, refined and precise application of the large-proportion weakly-caking coal is realized, and the coke quality is further improved.

Description

technical field [0001] The invention belongs to the technical field of coking coal blending, and particularly relates to an on-line coking coal blending control method. Background technique [0002] Coking coal usually has uneven particle size, and it is necessary to pulverize or screen the incoming coal to ensure the uniformity of coal blending. Before entering the coke oven, coking coal blending is generally divided into the process of first blending and then powder or first powder and then blending. The process of first mixing and then pulverizing is simple, the layout is compact, the equipment and investment are small, and the operation is convenient, but the particle size cannot be controlled according to different coal types and pulverization characteristics. It is suitable for coking coal with good cohesion and uniform coal quality. Most of the coking plants in my country use this process. The process of pulverizing first and then blending is to pulverize each sing...

Claims

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Application Information

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IPC IPC(8): C10L5/04
CPCC10L5/04
Inventor 武吉来威李勇侯士彬朱建伟陆云未福宇王海丹赵振兴高薇
Owner ANGANG STEEL CO LTD
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