溶出条件对铝土矿氧化铝溶出及赤泥中氧化铁富集的影响  

Influence of Digestion Condition on Bauxite Digestion and Iron Oxide Enrichment in Red Mud

作　　者：魏国令 李军旗[1,2] 陈朝轶[1,2] 郑晓倩[1,2] 谢振山[1,2] WEI Guo-ling LI Jun-qi CHEN Chao-yi ZHENG Xiao-qian XIE Zhen-shan(Materials and Metallurgy College, Guizhou University, Guiyang 550025, China Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang 550025, China)

机构地区：[1]贵州大学材料与冶金学院,贵阳550025 [2]贵州省冶金工程与过程节能重点实验室,贵阳550025

出　　处：《有色金属（冶炼部分）》2017年第7期26-29,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(51474079;51564003);贵州省氧化铝生产工艺与技术科技创新人才团队项目(黔科合人才团队[2015]4005号);贵州冶金资源综合利用工程研究中心项目(黔教合KY字[2015]334);贵州大学研究生创新基金(研理工2016018)

摘　　要：采用拜尔法高压溶出广西平果铝土矿,考察了溶出时间、溶出温度、石灰添加量以及苛碱浓度对氧化铝溶出及赤泥中氧化铁富集的影响。结果表明,最佳溶出条件为:溶出时间50min、溶出温度260℃、石灰添加量6%、苛碱浓度235g/L,在该条件下,氧化铝实际溶出率可达79.6%,赤泥中氧化铁含量达32.1%。Bauxite was high-pressure digested by Bayer process. Effects of digestion time, digestion temperature, lime addition, and concentration of caustic alkali on alumina digestion and iron oxide enrichment in red mud were investigated. The results show that real digestion rate of alumina is 79.6 % and iron oxide enrichment in red mud is up to 32.1% under the optimum conditions including digestion time of 50 min, digestion temperature of 260℃, lime dosage of 6%, and concentration of caustic alkali of 235 g/L.

关 键 词：赤泥 溶出 氧化铁 富集 

分 类 号：TF821[冶金工程—有色金属冶金]