Influence of coking processes on coke quality made by wet coal and dried coal
QIU Hao1, QU Li-kai2, ZHANG Xue-hong3, LIU He-ping4
1. State Key Laboratory of Advanced Steel Processes and Products, Central Iron and Steel Research Institute, Beijing 100081, China; 2. School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; 3. Central Research Institute (Wuhan), Baosteel, Wuhan 430080, Hubei, China; 4. Material Digital Research and Development Center, China Iron and Steel Research Institute Group, Beijing 100081, China
Abstract：In order to optimize the coking process and improve the coke quality effectively of coal blending, it is necessary to analyze the influence of coking process and dry cool and wet coal coking on coke strength and reactivity (CRI) systematically.Coking experiments of dry coal (moisture less than 3%) and wet coal (moisture more than 6%) were carried out in a 5 kg experimental coke oven under different working conditions. The effects of moisture content, dry base bulk density and charging temperature of coal on coke strength and reactivity were investigated, combined with the comparison of the optical texture and heating characteristics of coke center in coking process of dry coal and wet coal, and the mechanism of influence on coke quality was analyzed, which provides a theoretical reference for optimizing coking process. The results show that when the moisture and the charging temperature keep unchanged, the strength level of coke can be improved effectively by increasing the dry base bulk density of coal. When coking by wet coal, the moisture of which is higher than 6%, excessive moisture content (more than 8%) is not conducive to improve the wear resistance property of coke. However, when coking by dry coal, whose moisture is less than 3%, and when the moisture increases, the coke strength will decrease. If moisture content of coal is maintained at 2% can make the coke reactivity (CRI) stay at a higher level. By controlling the heating process to adjust the charging temperature and shorter coking time,the post-reaction strength(CSR) of coke could be improved, but the coke reactivity would be reduced.
仇灏, 瞿立凯, 张雪红, 刘和平. 炼焦工艺对干煤和湿煤成焦质量的影响[J]. 钢铁, 2022, 57(2): 12-18.
QIU Hao, QU Li-kai, ZHANG Xue-hong, LIU He-ping. Influence of coking processes on coke quality made by wet coal and dried coal[J]. Iron and Steel, 2022, 57(2): 12-18.
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2022, Vol. 57 
