An evaluation method of fat coal quality

An evaluation method and fat coal technology are applied in the fields of coal chemistry and metallurgical coking, which can solve the problems of fat coal quality defects, inability to meet the production needs of coal blending and coking, and achieve the effect of benefiting coke quality.

Active Publication Date: 2018-11-23
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology

[0009] The purpose of the present invention is to provide a method for evaluating the quality of fat coal, which mainly solves the technical problems that there are defects in the evaluation of fat coal quality in the prior art and cannot meet the production needs of coal blending and coking

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  • An evaluation method of fat coal quality
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Embodiment Construction

[0029] The present invention will be further described in detail through specific embodiments below.

[0030] Take 7 coking fat coal types currently used by a certain company as an example, and evaluate by the method of the present invention.

[0031] A kind of evaluation method of fat coal coal quality, comprises the following steps:

[0032]1) Detect the key indicators of coal quality of fat coal, take coal samples for testing, including industrial analysis, ash composition analysis, cohesion index G, maximum thickness of colloidal layer Y and full expansion DT, calculate MCI through industrial analysis and ash composition, The obtained data are shown in Table 1;

[0033] 2) Set P as the fat coal quality evaluation index, and determine it according to formula 1:

[0034] P=k 1 ×G+k 2 ×Y+k 3 ×DT + k 4 ×MCI + m Formula 1

[0035] In Formula 1, G, Y, DT, and MCI are the cohesive index, the maximum thickness of the colloidal layer, the total expansion degree, and the cata...

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Abstract

The invention discloses a method for evaluating the coal quality of fat coal. The technical problems of defect existence and unable meeting of coal blending coking production of evaluation of present fat coal quality are mainly solved. The method for evaluating the coal quality of fat coal comprises the following steps: 1, detecting the coal quality key indexes of the fat coal to obtain the caking index G of the fat coal, the maximum thickness Y of a colloidal layer, the total expansion degree DT and the catalysis index MCI; 2, setting P as a fat coal quality evaluation, and letting P be the value of k1*G+k2*Y+k3*DT+k4*MCI+m, wherein G is the caking index of the fat coal, Y is the maximum thickness of the colloidal layer, DT is the total expansion degree, MCI is the catalysis index, and k1, k2, k3, k4 and m are constants, and are obtained through fitting the fat coal quality indexes; and 3, calculating the fat coal quality evaluation index P, wherein the high value of the P shows the good coal quality of the fat coal. The method has the advantages of realization of effective evaluation of the coal quality of the fat coal, reasonable selection, and scientific application.

Description

technical field [0001] The invention belongs to the technical field of coal chemistry and metallurgy and coking, and in particular relates to an evaluation method of fat coal quality. Background technique [0002] In recent years, with the rapid development of iron and steel enterprises, the demand for coking coal has increased greatly, especially for moderately metamorphic and strongly caking coal such as fat coal. Fatty coal has strong cohesive ability and produces a large amount of colloid when heated, which is an important component of coal blending. In the coking scheme of coal blending, fat coal plays the role of adjusting the rheology and expansion of blending coal and promoting closer contact between coal particles of different coking coals. [0003] According to the Chinese coal classification standard (GB 5751-2009), coking coal with a volatile content of 10.0-37.0%, a G value > 85, and a Y value > 25.0 is uniformly classified as fat coal. Due to the wide s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/22
Inventor 张文成任学延顾建王春花
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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