Coking coal blending method for 1/3 coking coal with volatile content of 34% and above

Abstract

The invention discloses a coal blending coking method of 1 / 3 coking coal with 34% or above of volatile. According to the coal blending scheme, the method comprises the following steps: 1) measuring Gieseler fluidity on 1 / 3 coking coal, selecting 1 / 3 coking coal with a solid-soft temperature range of lower than 70 DEG C, marking with type II 1 / 3 coking coal and selecting 1 / 3 coking coal with a solid-soft temperature range of lower than 85 DEG C and marking with other 1 / 3 coking coal; and 2) carrying out coal blending by using the type II 1 / 3 coking coal according to the following percentage by mass: 1-10% of gas-fat coal, 1-15% of fat coal, 5-10% of type II 1 / 3 coking coal, 10-20% of other 1 / 3 coking coal, 40-45% of coking coal and 10-15% of lean coal. According to the method, solid-soft temperature range in Gieseler fluidity indexes is used for optimizing and subdividing 1 / 3 coking coal, and then in cooperation with a proper coal blending structure, the aim of stabilizing the quality of coking coal is achieved.

Description

technical field [0001] The invention belongs to the technical field of coking coal blending, and in particular relates to a coking coal blending method for 1 / 3 coking coal with a volatile content of 34% or more. Background technique [0002] my country is rich in coal resources, but coking coal resources are in short supply, and the limited coking coal resources are not evenly distributed. Among the proven coal reserves, coking coal reserves account for only 26% of the total coal reserves, coking coal accounts for only 17.57% of coking coal reserves, and fat coal accounts for 10%. In coal blending and coking, coking fat coal should generally account for 50%-60%, and there is a serious contradiction between coking coal resources and demand for coking coal blending. [0003] In order to minimize the use of coking fat coal, reduce production costs and improve coke quality, coking workers in various countries have gradually begun to pay attention to the application research of ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a coking coal blending method for 1 / 3 coking coal with a volatile content of 34% and above, so as to solve the partial coal quality partial gas coal in the 1 / 3 coking coal. The Y value measurement method cannot be effectively differentiated and utilized, resulting in the problem that the quality fluctuation of incoming coal leads to the fluctuation of coke quality