中南大学学报（自然科学版）2012，Vol.43Issue(10)：3755-3762,8.
基于直接还原的高铁铝土矿选择性富集
Selective enrichment of ferric bauxite based on direct-reduction process
摘要
Abstract
The effects of various factors, such as reduction coal dosage, preservation temperature, preservation time, and heating rate, on selective enrichment of useful constituents in ferric bauxite and the growth of corundum crystallite were investigated. The results show that the iron oxide in ferric bauxite is reduced into iron and accumulated in metallic phase. Diaspore and boehmite are converted into a-Al2O3 and enriched in corundum phase. Kaolin is converted into mullite and non-crystalline SiO2 and accumulated in aluminosilicate phase. The growth and coarsening of corundum grain are promoted by the increase of the preservation temperature. After reduction, no luppen or slag inclusion is found in clinker. It is found that selective enrichment of useful constituents can be realized by direct-reduction process.关键词
铝土矿/铁/氧化铝/刚玉/直接还原Key words
bauxite/iron/alumina/corundum/direct reduction分类
矿业与冶金引用本文复制引用
胡文韬,王化军,季春伶,孙传尧,于宏东,张云海..基于直接还原的高铁铝土矿选择性富集[J].中南大学学报（自然科学版）,2012,43(10):3755-3762,8.基金项目
"十一五"国家科技支撑计划项目(2008BAB32B06) （2008BAB32B06）
