高铁铝土矿的工艺矿物学及铝铁分离技术
来源期刊：中南大学学报(自然科学版)2006年第2期
论文作者：李光辉 董海刚 肖春梅 范晓慧 郭宇峰 姜涛
文章页码：235 - 240
关键词：铝土矿;磁选;除铁
Key words：bauxite; magnetic separation; iron removal
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)。
Abstract: 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.
