黔中铝土矿中铝矿物的矿物学研究

A Mineralogical Study of Aluminium Ore of Bauxite in Central Guizhou

本文较详细地研究了黔中铝土矿里各种铝矿物的晶体形态、产出状态、光性特征,着重研究了一水硬铝石和一水软铝石的化学成分、差热、红外和X—衍射特征,探讨了各种铝矿物的成因,并按照矿物成分划分出三种矿石类型。

This paper deals with the mineralogical features o>f Aluminium ore of bauxite deposits in Central Guizhou province by using various means of rock mineral identification, differential thermal analysis, infrared spectrum X-ray diffraction, electronic probing analysis and scanning electronic microscope. This paper also deals with in more detail the crystal forms, occurrances and spectro -features of various kinds of Aluminium ores of bauxite in Central Guizhou, especially the chemical composition and characteristics of differential thermal analysis, infrared spectrum and X-ray diffraction of diaspore and boehmite. Through analysis and identification, the differential thermal temperatures of diaspore are 518--559℃. The principal absorption bands are 3410,2980,2908,2100,1975,1075,1068,962,740,350(cm-1).The stronger lines of X-ray diffaction are 3. 995A ,3. 985A ,2. 559A ,2. 317A ,2. 132A ,2. 078A , 1.634A. The stronger lines of X-ray diffaction of boehmite are 6. 101A ,3.158A ,2. 342A , 1.859A. The study of mineralogical characteristics of various Aluminium ore, especially the study of mineralogical characteristics of diaspore and boehmite, shows the polyphase and complex nature of the formation of bauxite in Central Guizhou and indicates that in the bauxite in Central Guizhou the main industry Aluminium ore is diaspore and the secondary industry Aluminium ore is boehmite. The ore types of bauxite are mainly mixed diaspore and boehmite, and locally boehmite.