Method for coal blending for coking by high-metamorphic-grade weak caking coal

A coal blending coking and high metamorphism technology, which is applied in coking ovens, special forms of dry distillation, petroleum industry, etc., can solve the problems of large particles, easy cracks, and difficult crushing, so as to achieve reasonable utilization of coal resources, reduce coke cracks, and improve The effect of coke quality
CN102994130AInactive Publication Date: 2013-03-27NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2013-03-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for coal blending for coking by high-metamorphic-grade weak caking coal. The method comprises the following steps of: (1) crushing high-metamorphic-grade coal into different granularity gradients, respectively blending the high-metamorphic-grade coal under each granularity with other caking coals to carry out coking, detecting a quality index of obtained coke and determining the best crushing granularity of the high-metamorphic-grade coal; (2) blending non-high-metamorphic-grade coals in the blended coal and dividing into a coal part 1 and a coal part 2, blending the high-metamorphic-grade coal which is crushed to the best granularity with the coal 1 according to the previous proportion and pressing and molding a coal block, and mixing the high-metamorphic-grade coal which is crushed to the conventional granularity with the coal 2 according to the previous proportion to obtain blended coal 3; and (3) mixing the molded coal block with the blended coal 3 obtained by the step (2) and coking. The method disclosed by the invention can improve the adding amount of the weak caking coal on the premise that the quality of the coke is guaranteed, so that the effects of reasonably utilizing a coal resource and optimizing a coal blending structure are realized.
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Description

technical field

[0001] The invention relates to a coal blending and coking method, in particular to a method in which highly metamorphic and weakly caking coal materials participate in coal blending and coking Background technique

[0002] With the improvement of coke quality requirements for large-scale blast furnaces, the contradiction between the over-reliance on strong caking coal and the shortage of high-quality coking coal resources in coking coal blending has become increasingly prominent. On the premise of ensuring the quality of blast furnace coke, new coal Material pretreatment technology and rational use of weakly cohesive coal materials for coking have become an important way for the coking industry to optimize coal blending structure, reduce coking costs, and save coking coal resources. The pretreatment of coal materials includes increasing the bulk density of coal for furnace charging and regulating the particle size of coal materials. In order to improve the q...

Claims

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