Study on coal quality characteristics of Russian coking coal

GUO Qingjie; YUAN Dongying; MENG Qingyong; WANG Dongsheng; ZHANG Wei; GAO Chunyan

doi:10.3969/j.issn.1007-7677.2024.03.009

Abstract：Against the background of shortage of high-quality coking coal and increasingly prominent environmental protection issues in China,the demand for high-quality coking coal by coking enterprises is growing,so the import of Russian high-quality coking coal can serve as a useful supplement to coking coal resources,which can alleviate the tight supply and demand situation of coking coal.The coal petrography,coal quality,chemical proper-ties of coal ash,caking property and coke quality of single coal coking were analyzed in order to find out the problems of Russian coal in coal blending,so technical support for the large-scale utilization of Russian coking coal in the later stage can be provided.The results show that Russian coking coal is characterized by low ash,low sulfur and low con-tent of harmful trace elements,which can meet the requirements of imported coking coal;the content of vitrinite in the coal is over 80％,with homogeneous vitrinite predominating;the content of alkali metal is higher,and the mineral catalytic index is higher;Russian coal is characterized by strong adhesion,large thickness of plastic layer,good fluidity and good expansion,which can be better applied to coal blending and coking production.The coke reactivity index(CRI)of coke refined from the three Russian coals is above 40％,while the coke strength after reaction(CSR)is mostly below 30％.Therefore,the research on the chemical properties of coal ash and the regulation of ratio between reaction component and inert component should be carried out for the Russian coking coals,and a scientific and reasonable coal blending plan should be designed to alleviate the shortage of high-quality coking coal in domestic coking enterprises.