Abstract:

This paper studies the vitrinite characteristics of similar rank coking coal through density centrifugation method to separate the macerals of coal petrography,and also analyzes and compares their caking property and the features of the produced coke. The study shows that there are differences in volatile matters,caking property and inert-tolerant capacity of similar rank coals,while the difference in inert-tolerant capacity of vitrinite of the coking coals is larger,and the property of the produced coke from similar rank coal vitritite also has obvious difference.Compared with the coke produced from raw coals,the optical texture index of coke made from vitrinite is higher,while the strength and reactivity of the coke become decreased.