粒度对高硫铝土矿焙烧脱硫的影响  

Effect of Particle Size on Roasting Desulfurization of High-sulfur Bauxite

作　　者：张曼[1] 陈朝轶[1] 李军旗[1] 赵聪[1] 

机构地区：[1]贵州大学材料与冶金学院,贵阳550025

出　　处：《有色金属（冶炼部分）》2015年第5期33-36,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(51264006;51474079);贵州省科技厅国际合作项目(G[2013]7007);贵州省校合作项目(LH[2014]7609);贵阳市科技局项目([2012103]69;20122056-4);贵州省教育厅项目(黔教合重大专项字[2012]0002)

摘　　要：在不同矿石粒度下,探究焙烧预处理对矿石宏观形貌、粒度分布、硫含量、物相结构及矿物微观形貌的影响。结果表明,较粗粒径的盘磨矿的焙烧效果优于较细粒径的球磨矿;焙烧后矿石粒度有细化的趋势,其中盘磨矿中的黄铁矿被氧化成赤铁矿,颗粒变得较为疏松,球磨矿中含有微量的磁铁矿;在700℃、30min的焙烧条件下,矿石的硫含量从2.3%降低至0.48%,满足工业生产要求。The effects of roasting pretreatment on macro morphology, particle size distribution, sulfur content, phase structure and mineral microstructure were investigated based on different particle size of high-sulfur bauxite. The results show that the roasting effect of coarse particle size of millstone-milling is better than that of finer grain size of ball-milling. Ore particle size has a tendency to be refined after roasting. Pyrite in millstone-milling ore is oxidized to hematite, and particles become relatively loose. Ball grinding ore contains trace magnetite. Sulfur content in calcining declines from 2.3% to 0.48% with roasting at 700 %C for 30 min which satisfied industrial production requirement.

关 键 词：高硫铝土矿 焙烧 脱硫 粒度 

分 类 号：TF821[冶金工程—有色金属冶金]