|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Alumina & Bauxite
||Effects of Reductive Roasting with Sodium Salts on Leaching Behavior of Non-ferrous Elements in Bauxite Ore Residue
||Bona Deng, Tao Jiang, Guanghui Li, Qing Ye, Foquan Gu, Mingjun Rao, Zhiwei Peng
|On-Site Speaker (Planned)
In our previous study, SiO2 and Al2O3 were leached stepwise to further enrich TiO2 and Sc2O3 via acidic and alkaline leaching from the non-magnetic material, which was derived from reductive roasting with sodium salts and magnetic separation of bauxite ore residues. In this study, to elucidate the corresponding mechanism, effects of reductive roasting with sodium salts on leaching behaviors of the non-ferrous elements were further investigated. The results showed reductive roasting with sodium salts can promote the selective separation of SiO2 and Al2O3 in acidic leaching process as to increase the difference of leaching ratio between them from 30% to 60%. In the meanwhile, the extraction of Al2O3 in alkaline leaching process and enrichment of Sc2O3 were proved related to the upstream reductive roasting procedure, and the enrichment of TiO2 was testified to be associated with insoluble perovskite (CaTiO3) generated in the reductive roasting process.
||Planned: Light Metals