Method for determining optimal particle size of finely ground gas coal participating in coking and coal blending

Abstract

The invention relates to a method for determining the optical particle size of finely ground gas coal participating in coking and coal blending, which comprises the following steps: firstly, grinding the gas coal according to the different particle size grinding grades; secondly, mixing with a single coal respectively by the same proportion, and obtaining the mixed coal; thirdly, placing all the mixed coal in crucibles respectively, heating at the temperature of 850 DEG C plus or minus 10 DEG C for 13-20 minutes, and weighing the coke weight m respectively; fourthly, rotating in a caking index rotary drum for 250 plus or minus 50 turns respectively, screening respectively, and weighing the coke weight m1 respectively; fifth, further placing into the caking index rotary drum for rotating for 250 plus or minus 50 turns, screening, and weighing the coke weight m2 respectively; sixth, putting all the m, m1 and m2 into a formula that X is equal to (30*m1+70* m2)/m+10 for calculation; and seventh, determining the particle size value with the maximum X value as the optimal particle size of the finely ground gas coal. The method can ensure the reasonable particle size of the coal entering a furnace and lead the quality of the produced coke to be stable.

Description

technical field [0001] The invention relates to the technical field of coking, in particular to a method for coking coal blending, in particular to a method for determining the optimum particle size of finely pulverized gas coal involved in coking coal blending. Background technique [0002] Gas coal is a kind of coking coal with low degree of deterioration, high volatile content, high content of inert components, and high hardness. Due to the high content of inert components and large size of gas coal, the best way to use it is to use pre-crushing Fine crushing treatment; however, the particle size required for blending into gas coal should be appropriate, neither too large nor too fine. If the particle size is too large and the particle size of the inert component is large, it will become the crack center of coke. If the particle size is too small, the energy consumption of coal grinding will be too large due to its high hardness. How to choose the appropriate particle si...

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Problems solved by technology

If the particle size is too large, the particle size of the inert component will be large, which will make it the crack center

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