宁夏宁东煤田灵武矿区煤中砷含量及赋存形态探讨

Discussion on arsenic content and occurrence form in Ningdong coalfield in Ningxia

通过对宁夏宁东煤田灵武矿区2号煤层煤样测试数据进行相关性分析,总结该矿区煤中砷的含量特征,探讨煤中砷的赋存状态和砷的来源,为砷的脱除方法提供理论依据。结果表明,宁东煤田矿区2号煤层中砷含量平均值为3.8μg/g,低于中国煤中砷含量平均值,属于一级含砷煤。煤中砷主要与硫化物结合的无机态存在,在黏土矿物、硅酸盐类矿物、有机矿物中赋存的几率很小,砷元素的来源为后生来源,富集主要受构造裂隙热液影响。

Based on the correlation analysis of coal sample test results of No.2 coal seam in Ningdong coalfield of Ningxia,the characteristics of arsenic content in coal in the mining area were summarized,and the occurrence state and source of arsenic were discussed,so as to provide theoretical basis for arsenic removal methods.The results showed that the average arsenic content of a mining area in Ningdong coalfield was 3.8μg/g,which was lower than the average value of arsenic content in China,so it belongs to the first grade arsenic bearing coal.The inorganic state of arsenic in coal mainly combines with sulfide,the probability of occurrence in clay minerals,silicate minerals and organic minerals was very small,the source of arsenic was epigenetic.The enrichment was mainly affected by structural fracture hydrothermal solution.