摘要
针对我国铝电解工业每年约产生60万t过剩铝电解质的全元素资源化利用进行了研究。在分析铝电解质化学成分和物相组成的基础上,研究了有效氧化钙添加量对铝电解质钙化焙烧反应的影响,揭示了铝电解质钙化焙烧产物在碱性溶液中的浸出及反应产物。试验结果表明,有效氧化钙添加量为40%~50%的条件下进行钙化焙烧反应并在碱液中浸出,铝电解质中的铝、钠、氟元素回收率分别为93.35%、90.21%、90.53%,实现铝电解质中的氟、钠、铝、钙等多组分有价元素的资源化利用。
Recovery and utilization of multiple elements in aluminum electrolyte of extra 0.6 million tons produced in China every year was studied.Based on chemical analysis and mineral tests for aluminum electrolyte,effect of available lime additions on calcified roasting reactions of aluminum electrolyte was investigated and leaching and reaction products of calcified roasted products in caustic solution were revealed.The results show that recovery of Al,Na,F in aluminum electrolyte is 93.35%,90.21%,and90.53%,respectively by calcified roasting under the conditions of 40%-50%of available lime and following caustic leaching for roasted products.Multiple valuable elements in aluminum electrolyte such as Na,Al,F and Ca can be recovered and resource utilized.
作者
刘风琴
李爱杰
李荣斌
杨新
吴泽港
LIU Feng-qin;LI Ai-jie;LI Rong-bin;YANG Xin;WU Ze-gang(School of Metallurgy and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2021年第2期67-71,122,共6页
Nonferrous Metals（Extractive Metallurgy)
基金
国家重点研发计划重点专项项目(2019YFC1908403)。
关键词
铝电解质
钙化焙烧
回收利用
aluminum electrolyte
calcified roasting
recovery and utilization
