高铁沉积型铝土矿的选矿技术研究

以云南高铁沉积型铝土矿为研究对象开展选矿试验研究工作。铝土矿原矿Al_2O_3品位45.58%,SiO_2品位8.73%,TFe品位19.78,A/S为5.22。在研究了该矿石化学成分与矿物组成的基础上,进行了磁选脱铁、正浮选一水硬铝石的试验研究,最终得到Al_2O_3品位55.38%、回收率达到69.17%的精矿,TFe品位10.73,A/S为9.87。研究成果表明,高铁沉积型铝土矿通过磁选—浮选工艺可以实现脱铁提铝降硅的目的。

TECHNOLOGY STUDY ON BENIFICIATION OF THE HIGH FERROUS SEDIMENTARY BAUXITE

Targeted at high ferrous sedimentary bauxite in Yunnan province, we carried out mineral processing research work. Bauxite ore Al2O3 grade is only 45.58%, SiO2 grade is 8.73%, total Fe 19.78%, A/S is 5.22. In this experiment, based on mineral composition and chemical analysis, the key study is the magnetic separation for removing ferrous and direct flotation of the diaspore minerals to increase A/S. This paper gets the following figures from the experiment: Al2O3 grade in concentrate is 55.38%, Al2O3 recovery rate reaches 69.17%, total Fe 10.73%, A/S is 9.87. The research results of this paper show that, high ferrous sedimentary bauxite can remove ferrous up aluminum down silicon by magnetic separation- flotation process.