中国煤中铍的分布赋存特征研究
中国煤中铍的分布赋存特征研究
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摘要: 根据对中国不同矿区1018个煤层煤样和生产煤样铍含量数据的统计结果,分析了中国不同成煤时代、不同聚煤区煤中铍的分布特征。同时,根据对10个不同煤田煤样的实验室浮沉试验、煤岩分析等试验研究,运用Solari方法,计算了煤中各组分中铍的理论含量,讨论了中国煤中铍的赋存特征,尤其是铍在各种煤岩组分中的分布。研究表明,铍在煤中富集程度较高,但相对于世界煤中平均水平来说,中国煤中铍含量总体水平较低。煤中铍主要赋存于惰质组及伊利石粘土矿物中,在镜质组及其它矿物中含量较低。同时,中国大多数煤中铍的有机亲和性指数较高,不利于选煤过程中铍的脱除。Abstract: This paper presents the distribution characteristics of beryllium in Chinese coals based on 1018 samples from different geological ages and regions all over the country. By means of float-sink experiments and maceral analysis for 10 Chinese coal samples and by the introduction of Solari model, the modes of occurrence of beryllium in coal are studied. The results show that there are relatively remarkable differences among distribution and occurrence of beryllium in coals from different ages and regions in China. Taking account of the differences of coal resources in different regions, the weighted average concentration of beryllium in Chinese coals is calculated. The result shows that the average content of beryllium in Chinese coals is lower than that in the world. In general, the modes of occurrences of beryllium in macerals are complex but for most coals in China, beryllium is mainly distributed in inertinite and clay minerals and the calculated content of beryllium in vitrinite is lower. It can be anticipated that beryllium in most Chinese coals is difficult to be removed during coal preparation due to its high organic affinity.