The kaolin coal tonstein are a kind of important nonmetal mineral raw materials. 煤系高岭岩是一种重要的非金属矿物原料。
The kaolinite tonstein in the seam 5# is formed by acidic ash alterated in the acid medium in peat bog in tongchuan district. 铜川矿区5%23煤层中的高岭石泥岩夹矸是由酸性火山灰在近地表的成煤条件下经酸性水淋滤、蚀变而成的。
The original matter of the tonstein and its grain size are main reason for that the different textures of the tonstein are of different element contents in the same bed. 夹矸的原始组分及粒度大小是造成同一夹矸层中不同夹矸类型间元素含量差异的主要原因。
