|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Alumina & Bauxite
||Processing Diasporic Red Mud by the Calcification-carbonation Method
||Xiaofeng Zhu, Zhang Ting'an, Guozhi Lv, Fangfang Guo, Weiguang Zhang, Yanxiu Wang, Liqun Xie, Long Wang
|On-Site Speaker (Planned)
The novel calcification-carbonation method was proposed to process the diasporic red mud discharged from Bayer process alumina plant. In this study, Batch experiments were performed to evaluate the potential effects of important parameters such as temperature, amount of CaO added, CO2 partial pressure and carbonation cycles on the recovery of alkali and alumina. The results showed that 99.8% alkali and 78.74% alumina were recovered from the diasporic red mud with decreases in the mass ratios of Na2O to SiO2 (N/S) and of Al2O3 to SiO2 (A/S) from 0.44 and 1.27 to 0.001 and 0.27, respectively. The Na2O content in the processed red mud was less than 0.1 wt%, and it can be used as a construction material.
||Planned: Light Metals