Comprehensive utilization of bauxite residue for simultaneous recovery of base metals and critical elements
Comprehensive utilization of bauxite residue for simultaneous recovery of base metals and critical elements
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DOI：
10.1016/j.susmat.2022.e00466
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发表时间：
2022-07-08
影响因子：
9.6
通讯作者：
Mishra, Brajendra
中科院分区：
文献类型：
--
作者：
Tanvar, Himanshu;Mishra, Brajendra
不断增长的铝土矿残渣库存和相关的环境危害需要一个复杂的回收系统，以实现完全利用和价值回收。目前的应用仅限于建筑和建筑应用的原材料。考虑到铝土矿残渣中多种元素(Fe、Al、Si、Ca、Ti、V、Sc)的结合，金属提取与最终产品的经济价值密切相关。以下研究提出了一种基于湿法冶金的工艺流程，用于可持续地回收铝土矿残渣中的贱金属和关键元素。铝土矿残渣中的主要元素被回收作为工业应用的原料，包括高纯度磁铁矿、氧化铝、二氧化钛、二氧化硅和碳酸钙。在回收贱金属后产生的液流中回收痕量元素。
The growing stockpiles of bauxite residue and associated environmental hazards require a sophisticated recycling system for complete utilization and value recovery. The current application is limited as a raw material for building and construction applications. Considering the association of multiple elements (Fe, Al, Si, Ca, Ti, V, Sc) within bauxite residue, metal extraction is of prime interest with respect to the economic value of the final product. The following study presents a hydrometallurgy-based process flowsheet for the sustainable recovery of base metals and critical elements within bauxite residue. Major elements present in bauxite residue are recovered as materials for industrial application, including high purity magnetite, alumina, titania, silica, and calcium carbonate. Trace elements are recovered in the liquid stream generated after the recovery of base metals.