钙化—碳化法连续化处理一水硬铝石拜耳法赤泥  

Treatment of Diaspore Bayer Red Mud with Calcification-Carbonation Continuous Process

作　　者：解立群[1] 张廷安[1] 吕国志[1] 朱小峰[1] 王艳秀[1] 杨金霖[1] 

机构地区：[1]东北大学多金属共生矿生态化冶金教育部重点实验室,沈阳110819

出　　处：《有色金属（冶炼部分）》2017年第4期16-19,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(U1202274);中央高校基本科研业务费专项资金资助项目(N140204015)

摘　　要：提出了"钙化—碳化法"低成本、大规模综合利用拜耳法赤泥新工艺。为简化工艺流程,将钙化与碳化两个过程做了连续化的尝试,即在钙化后不进行固液分离直接进行碳化,钙化碳化两个过程可在同一反应器进行,减少了设备需求和能源损耗。对比试验结果表明,传统处理法和连续处理法的溶铝渣中Na_2O含量分别为0.17%和0.23%,氧化铝提取率分别为35.6%和34.6%,初步证明了连续化的可行性。A novel＂calcification-carbonation＂method with low cost and large-scale was developed to recover alumina from Bayer red mud.Calcification-carbonation continuous method was explored to simplify process.The calcification product was carbonated directly without solid-liquid separation.Process of calcification and carbonation was operated in one reactor.Comparative study shows that 34.6% and35.6% alumina are recovered from diasporic red mud by traditional and continuous method,and Na2 O content in processed red mud is 0.23% and 0.17 % respectively.Feasibility to continuously treat Bayer red mud by＂calcification-carbonation＂method is proved preliminarily.

关 键 词：拜耳法 赤泥 钙化-碳化法 水化石榴石 

分 类 号：TF821[冶金工程—有色金属冶金]