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.
出处
《有色金属（冶炼部分）》
CAS
北大核心
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)
关键词
拜耳法
赤泥
钙化-碳化法
水化石榴石
Bayer process
red mud
calcification-carbonization
hydrogarnet
