Relation Between Microstructure Characteristics of Coal and Coke and Quality of Coke

The coal petrography of 13 different rank single coals and the quality of cokes made by 4 0 kg pilot coke oven were measured and analyzed.The results indicate that the relationship between optical texture index of coke(OTI) and vitrinite mean maximum reflectance of single coal is positive linear correlation.By multiple linear regression analysis,the quantitative relationship between vitrinite reflectance distribution and the component of coke optical texture are determined.The influence of composition of coke optical texture on crushing strength for coke(M40) and coke reactivity index(CRI) can be summarized: the more mosaics texture proportion of the optical texture,the better of crushing strength for coke(M40) and its coke reactivity index(CRI).