1. State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan　 430074,China;2. Middle Changjiang River Bureau of Hydrology and Water Resources Survey,Wuhan　 430012,China;3. School of Energy and Power Engineering,Huazhong University of Science and Technology, Wuhan　 430074,China

利用计算机控制扫描电镜(computer-controlled scanning electron microscopy,CCSEM)系统对6种中国典型动力煤进行矿物分析,得到矿物的种类组成、空间分布、粒径大小以及主要无机元素在矿物中的分布等特性,并根据矿物类型进行整理。结果表明,对于所分析的6种煤,氧化物在低阶煤中含量较高,黏土矿物是高阶煤中的主要矿物,碳酸盐和硫化物在特定煤种中含量较高,硫酸盐和其他矿物含量普遍较低;矿物平均含量由高到低依次为黏土矿物、氧化物、碳酸盐、硫化物、硫酸盐和其他矿物;煤中矿物以外在分布为主,外在矿物质量占总矿物的76.3%;外在矿物粒径明显大于内在矿物;矿物平均粒径由大到小依次为氧化物、碳酸盐、黏土矿物、硫化物、硫酸盐和其他矿物;Si和Al元素主要集中于黏土矿物中,Ca,Fe和S元素分布相对分散。

Computer-controlled scanning electron microscopy (CCSEM) was used to investigate the properties of min- erals in six Chinese typical steam coals. The mineral species compositions,spatial distributions,particle sizes and ele- ment distributions in minerals were obtained. The results show that for the used coals,oxide mineral contents are high in low rank coals,clay minerals are dominant in high rank coals,carbonate and sulfide mineral contents are high in specific coals,and sulfate and other minerals contents are low in each coal;the contents of various types minerals are arranged from high to low as follows:clay minerals,oxide minerals,carbonate minerals,sulfide minerals,sulfate miner- als and other minerals;the excluded mineral accounts for 76. 3% of total mineral in mass;the average particle size of excluded minerals is significantly larger than that of included minerals;the average mineral particle sizes are arranged from large to small as follows:oxide minerals,carbonate minerals,clay minerals,sulfide minerals,sulfate minerals and other minerals;Si and Al mainly distribute in clay minerals,Ca,Fe and S distribute dispersedly in many types of min- erals.

国家重点基础研究发展计划(973)资助项目(2013CB228501)；国家国际科技合作专项资助项目(2015DFA60410)；

Zhang Ping’an,Yuan Jing,Wen Chang,et al. CCSEM investigation on the mineral properties of six Chinese typical steam coals[J]. Journal of China Coal Society,2016,41(9):2326-2331.