MIGRATION BEHAVIOR AND WASHABILITY OF FLUORINE IN GUIZHOU COAL DURING CLEANING PROCESS

摘要：

Guizhou coal was studied through regressive release flotation and float-sink experiment, low-temperature ashing experiment, change law of fluorine content in the different products, inorganic affinity between fluorine and inorganic minerals, washability and removal ability of fluorine. The result shows that the inorganic species is the primary form of fluorine existence in the SC-DHB coal; the fluorine concentration depends on the kinds of fluorine-bearing minerals and their contents; fluorine in the SC-DHB coal has strong inorganic affinity; as clean coal ash is 10.0％, the floatability of the SC-DHB coal is in the middle degree; as clean coal ash is 13.0％, the washability grade is ‘easily to process’. The floatability of SC-DHB coal is in the middle degree according to theoretical clean coal recovery; it is possible to remove dirt bands and minerals; for low fluorine mass fraction coal, fluorine mass fraction may be less than lower limit of fluorine pollution in surroundings, and washing floatation technology of Guizhou raw coal is feasible in fluorine removal of coal.

关键词： fluorine species low-temperature ashing washability removal ability

作者: Xuefeng LIU Chuguang ZHENG Dangyu SONG Jing LIU Junying ZHANG

作者单位: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, Hubei Province, China

会议类型: 国际会议

会议名称: 第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)

会议地点: 武汉

会议语种:英文

页码: 593-599

在线出版日期: 2007-12-01（万方平台首次上网日期，不代表论文的发表时间）