赤泥与低品位铝土矿制取Al-Si合金的研究  

Study of making Al-Si alloy with red mud and bauxite

作　　者：马黎[1] 吴贤熙[1] 张军伟[2] 兰军[1] 

机构地区：[1]贵州大学化学工程学院,贵州贵阳550003 [2]东南大学市政工程系,江苏南京210096

出　　处：《应用化工》2009年第1期41-43,60,共4页Applied Chemical Industry

基　　金：贵阳市科学技术计划项目([2007]筑工科合同字第1-5号)

摘　　要：对电热还原赤泥与低品位铝土矿制取铝硅合金进行了研究。结果表明，配以低品位铝土矿的赤泥熔炼铝硅合金切实可行，熔炼出的铝含量为50％，硅35％和一些杂质。其中的杂质主要是铁和一些金属氧化物。最佳熔炼温度为2000～2200℃，合金中的Al、Si含量均随还原温度的升高而增大；相同还原温度下的Si回收率大于Al的回收率；使用含冰晶石和氯化钠混合物的精炼剂可有效去除合金中的杂质。The experiment of manufacturing Al-Si alloys with red mud and bauxite by electro-thermal method was conducted. The experimental results showed that making of Al-Si alloy by blending low grade bauxite and red mud was feasible;the melting Al-Si alloys included 50% aluminum,35% silicon and some impurities. The main impurities were iron and metallic oxides. The optimum smelting temperature was between 2 000 - 2 200 ℃. Both Al and Si content in alloys increased with reduction temperature rising. Under the same reduction temperature, the recovery rate of Si was higher than Al. Impurities in alloy was removed by using cryolite and sodium chloride as purificant.

关 键 词：赤泥 低品位铝土矿 铝硅合金 精炼 电热法 

分 类 号：TF655[冶金工程—钢铁冶金]