Coal blending method for coking 1/3 coking coal having solid softening temperature interval below 85 DEG C

Abstract

The invention discloses a coal blending method for coking 1 / 3 coking coal having a solid softening temperature interval below 85 DEG C. A coal blending scheme of the method comprises the following steps: 1), carrying out Gieseler fluidity measurement on the 1 / 3 coking coal, and selecting the 1 / 3 coking coal having the solid softening temperature interval of 70 to 85 DEG C and marking as I-type 1 / 3 coking coal, marking the 1 / 3 coking coal having the solid softening interval over 85 DEG C as other 1 / 3 coking coal; 2) carrying out coal blending on the I-type 1 / 3 coking coal according to the components in percentage by mass: 1 to 10 percent of gas-fat coal, 1 to 10 percent of fat coal, 1 to 15 percent of the I-type 1 / 3 coking coal, 10 to 20 percent of the other 1 / 3 coking coal, 40 to 45 percent of coking coal and 10 to 15 percent of lean coal; volatile components of the 1 / 3 coking coal having the solid softening temperature interval below 85 DEG C account for 34 percent and over. According to the coal blending method disclosed by the invention, the 1 / 3 coking coal is optimized and subdivided by adopting the solid softening temperature interval in Gieseler fluidity indexes in conjunction with a suitable coal blending structure, and thus a purpose of stabilizing the quality of the 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 whose solid-soft temperature range is 1 / 3 coking coal below 85°C. 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 resear...

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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 with a solid-soft temperature range of 1 / 3 coking coal below 85°C, so as to solve the partial coal quality partial gas coal in 1 / 3 coking coal with a volatile content of 34% and above According to the currently widely used G and Y value measurement methods, they cannot be effectively differentiated and utilized, resulting in the problem that the quality fluctuation of incoming coal leads to the fluctuation of coke quality