高铁铝土矿的工艺矿物学及铝铁分离技术  

Mineralogy and separation of aluminum and iron from high ferrous bauxite

作　　者：李光辉[1] 董海刚[1] 肖春梅 范晓慧[1] 郭宇峰[1] 姜涛[1] 

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2006年第2期235-240,共6页Journal of Central South University:Science and Technology

基　　金：国家重点基础研究发展规划项目(G1999064901)

摘　　要：研究含铁铝土矿（A和B 2种矿样）的工艺矿物学和磁选铝铁分离技术. 研究结果表明： 2个样品中的铝矿物为晶体粒度细小的一水硬铝石（粒度为5～20 nm）;铁矿物主要为赤铁矿和褐铁矿, 铁矿物嵌布粒度相对较粗（粒度为0.5～3.0 mm）. 当粒度小于0.074 mm的A和B含量分别为87.50%和78.30%, 磁感应强度分别为1.2 T和1.0 T时, 可获得Al2O3质量分数大于65%, Fe2O3质量分数为5%～9%的非磁性物（铝精矿）.Based on the study of mineralogy, the separation of aluminum and iron from high ferrous bauxites（A and B） was investigated. The results show that the chief mineral is diaspore（size of 5 -20 nm） and the iron minerals are hematite and limonite mainly, whose sizes are 0. 5-3.0 mm. When the contents of A and B whose diameters are less than 0. 074 mm are 87.50% and 78.30% with magnetic flux density of 1.2 T and 1.0 T, respectively. A concentrate of non-magnetic substance including over 65% （mass fraction） Al2O3 and 5%-9% Fe2O3 is obtained.

关 键 词：铝土矿 磁选 除铁 

分 类 号：TD924.1[矿业工程—选矿]