论文部分内容阅读
系统分析了广西未变质煤、区域变质煤和热液变质煤的ＳｉＯ２、Ａｌ２Ｏ３、Ｆｅ２Ｏ３、ＭｇＯ、ＣａＯ、Ｎａ２Ｏ、Ｋ２Ｏ、ＴｉＯ２、ＳＯ３。低灰分煤的常量元素主要来自古植物对成土母岩的选择性吸收，具明显的超基性或基性特征。随煤变质程度升高，未变质煤、区域变质煤中的常量元素没有发生迁移，而热液变质煤中的ＳｉＯ２和Ａｌ２Ｏ３相对增加，ＳＯ３和ＣａＯ相对减少。
The contents of SiO2, Al2O3, Fe2O3, MgO, CaO, Na2O, K2O, TiO2 and SO3 in Guangxi unmetamorphic coal, regional metamorphic coal and hydrothermal metamorphic coal were systematically analyzed. The constants of low-ash coal are mainly from the selective absorption of the parent rocks into the rocks by the ancient plants, with obvious ultrabasic or basic characteristics. With the increase of coal metamorphism, the unaltered coal and the regional metamorphic coal did not migrate. However, the contents of SiO2 and Al2O3 in hydrothermal metamorphic coal increased relatively, and SO3 and CaO decreased relatively.