摘要
晋豫铝土矿属一水硬铝石型，主要物质组分是一水硬铝石、高岭石、伊利石和绿泥石，其中伊利石和绿泥石是主要的有害杂质。在晋北区的某些矿石中，可以出现一定数量的一水软铝石。晋北区矿石以Ａｌ２Ｏ３含量较低、粘土物质总量高、可磨性差为特点；平陆豫西区以Ａｌ２Ｏ３含量高、粘土物质总量低、可磨性好和预脱硅效率低为特点。吕梁和太行区矿石含Ａｌ２Ｏ３较高，粘土物质以高岭石为主，可磨性适中，预脱硅效率高。粘土矿物含量少的正常型粗糙状和碎屑状矿石是优质矿石。高岭石型矿石是可利用的贫矿，绿泥石型矿石不应作为可用矿石考虑，伊利石型矿石应慎用。
The bauxite ore in Shanxi and Henan belongs to diaspore type The main components of ore are diaspore, kaolinite, illite and chlorite, among them illite and chlorite are the harmful impurities In north Shanxi, the bauxite ore shows that Al 2O 3 is low, clay mineral is high and the grindability is no good, whereas in west Henan, Al 2O 3 is high, clay mineral is low, the grindability is good and the efficiency of predesilication is low, and in Luliang and Taihang of Shanxi, and Al 2O 3 is high, kaolinite is the main component in clay mineral, efficiency of predesilication is high The subtypes of normal and clastic ore are excellent for the alumina production The kaolinite subtype ore can not be regarded as a suitable ore It should take care to use the bauxite rich in illite The bauxite ore occurred in Luliang and Taihang areas are mostly suitable to Beyer process
