With the increasing shortage of coking coal resources,the coking process has higher and higher requirements for fine coal blending.To explore the influence of different coking coals on the pyrolysis behavior and pore structure of coke coal,the fluidity and pyrolytic weight loss behavior of different coals were measured by Jilds plasticity meter and thermogravimetric analyzer.It is found that the fluidity of coals decreased by 48.4 ddpm when the amount of CoalB and CoalE was 30％,and the fluidity of coals increased by 902.1 ddpm and 520 ddpm when the amount of CoalC and CoalD was 30％,respectively.There is no additivity between the fluidity of the coal,but there is a certain additivity between the output of pyrolysis volatilization.The pore structure of the coke was tested by microscopic image analysis by using a small retort unit to perform high-temperature dry distillation with coal.It is found that the average pore size and average wall thickness of coke formed by different single coal blended with main coking coal are related to the pyrolysis flow characteristics and volatile matter evolution characteristics of the combined coal,but the correlation is different with the characteristics of the single coal.The correlation coefficient R2 of the average pore size of different single coal pairs after coking of the coal is between 0.60～0.95,and the correlation coefficient R2 of the average wall thickness of different single coal pairs is between 0.87～0.95.
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