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一、铝土矿的化学成分及按工业用途的矿石品级划分: 铝土矿从其外观看酷似固结之土壤。其破口具有土壤质粗糙感。颜色不一,一般多呈灰、青灰——茶、褐、茶绿色甚至黑色。具有状结构者亦甚普遍。华北的铝土矿层普遍介于与奥陶纪灰岩呈假正合接触的上复石炭纪层之底部。铝土矿的成因问题基本上有:残积的红土说,热液成因说及化学沉积说三种。华北石炭纪铝土矿属化学沉积成因的看法业为地质界之多数所公认。山东淄博矿区铝土矿的主要组成矿物是:游离的
First, the chemical composition of bauxite and ore grade by industrial grade: bauxite resembles the consolidation of the soil from its appearance. Its breach has a rough sense of the soil texture. Different colors, mostly ashes, gray - tea, brown, green tea and even black. Shape-like structure is also very popular. The bauxite in North China is generally at the bottom of the upper Carboniferous layer that is in contact with the Ordovician limestone. The causes of bauxite are basically: residual clay said that the cause of hydrothermal that chemical deposition and said three. The view of the origin of chemical deposition of Carboniferous bauxite in North China is widely recognized by the geological community. Shandong Zibo mining bauxite main mineral is: free