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Coal blending method to control coke wear resistance

A technology of wear resistance strength and coal blending, applied in the field of coal chemical industry, can solve problems such as large differences in coal quality and differences in blending methods

Active Publication Date: 2018-01-23
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual coal blending, it is found that the coal quality of low-metamorphic and weak-caking coking coal is quite different from that of high-metamorphic and weak-caking coking coal. In the actual coal blending, there are also great differences in the blending methods

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  • Coal blending method to control coke wear resistance
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Embodiment Construction

[0017] The technical scheme designed by the present invention comprises the steps:

[0018] (1) Control gas fat coal and fat coal quality:

[0019] Gas fat coal lgMF≥4.8, fat coal volatile matter≤33%, lgMF≥4.0;

[0020] (2) The distinction between weak cohesive coking coal:

[0021] Will Coking coal with Y value ≤ 12mm is defined as low metamorphic and weakly caking coking coal; Coking coal with G value ≤ 65 is defined as highly metamorphic and weakly caking coal.

[0022] (3) Matching method:

[0023] ① The dosage of low-metamorphic and weak-caking coking coal is ≤10%, and the dosage of high-metamorphic and weak-caking coking coal is >12%:

[0024] Low-metamorphic weak caking coal: 0-10%; gas fat coal: 0-10%; fat coal: 10%-25%; coking coal 38-42%; 1 / 3 coking coal: 15%-35%; high-metamorphism Weakly caking coking coal: 13% to 18%; of which: the sum of gas fat coal and fat coal is 20% to 25%, the sum of low metamorphic and weakly caking coking coal and high metamorphic w...

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Abstract

The invention discloses a coal blending method for controlling coke abrasive resistance. The coal blending method includes the following steps that mass of gas-fat coal and mass of fat coal are controlled; a low-cohesiveness coking coal region is divided into low-metamorphism low-cohesiveness coking coal and high-metamorphism low-cohesiveness coal; blending is performed for utilization. The low-cohesiveness coking coal region is divided into the low-metamorphism low-cohesiveness coking coal and the high-metamorphism low-cohesiveness coal, by controlling the mass of gas-fat coal, the mass of fat coal and usage amount of single coal of various types, the blending amount of the low-cohesiveness coking coal can be increased substantially, and under the coking technological conditions of no coal briquette, precrushing, coal moisture control and the like, the amount of coke M10 obtained by dry quenching through a coking oven with the height of 6 meters or more is smaller than or equal to 6.0%.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a coal blending method for controlling coke wear resistance. Background technique [0002] As the main raw material for blast furnace smelting, coke should have high cold strength in the blast furnace to resist the mechanical impact and wear of coke during the descent of the block belt; coke should also have high hot strength to Ensure that the coke has sufficient strength and lumpiness when 25% to 35% of carbon is consumed due to carbon dissolution reaction in the upper part of the tuyere area, and maintain a certain particle size and strength in the dead material column area and tuyere area at a higher temperature. Therefore, the quality of coke The indicators usually include the crushing strength M40 of coke, the wear resistance M10 of coke, and the thermal strength CRI and CSR of coke. [0003] At present, the lack of wear resistance of coke is gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B57/04
Inventor 项茹宋子逵薛改凤常红兵冷婷陈超陈琳鲍俊芳张雪红任玉明周立鹏孙彬詹立志陈鹏王元生陈细涛
Owner 武汉钢铁有限公司