Research on the influence of particle size distribution of gas coal and long flame coal to coke qualities
WANG Zhanchao
Abstract：The inert component of weakly bonded coal such as gas coal and long flame coal play a skeleton role in the coking process,and the size of coal particle affects the position and size of the binding surface in coke,therefore it affects the quality of coke.Therefore,the particle size of coking coal is the critical affect factor for the quality of coke.In order to research the optimal particle size distribution of gas coal and long flame coal in coking and blending process,the gas coal that comes from Hecaogou and the long flame coal that comes from Yulin were broken to less than 0.50 and 0.50-2.00 mm respectively by using crushing equipment,which mixed with the main coking coal in the same ratio,and composed 5 kinds of mixed coal.40 kg coke oven coking tests under the same experimental con-ditions were conducted,and the mechanical strength and thermal strength of coke under each scheme were analyzed.The results show that the particle size of long flame coal and gas coal should be controlled between 0.50-2.00 mm,which could improve the mechanical strength and thermal strength of coke;when the particle size of the gas coal and long flame coal were broken too much,especially below 0.50 mm,it will lead to degradation of mechanical strength and thermal strength of coke,for the coal such as gas coal and long-flame coal,which need to be primary crushing,the process parameters of the crushing equipment should be optimized and improved,so as to ensure that the particle size distribution after crushing is concentrated in 0.50-2.00 mm.
Keywords：coal blending cokingparticle size distributioncoke qualityinert componentsgas coallong flame coalmechanical strengththermal strength
Publication Date：2025-01-09