|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Alumina & Bauxite
||Study on Effective Extraction of Al and Fe from High-iron Bauxite through “Calcification-carbonization” Method
||Zhang Weiguang, Zhang Ting'an, Lv Guozhi, Zhang Xuhua, Zhu Xiaofeng, Wang Yanxiu, Wang Long
|On-Site Speaker (Planned)
With the rapid development of China alumina production, efficient utilization of plentiful low gradehigh-iron bauxitehas received widespread attention in the aluminum industry. Based on this, “calcification-carbonization-direct reduction”method is propsed for extracting effectively valuable metals Al and Fe from high-iron bauxite. The research results indicate that: after the calcification-carbonization process for high-iron bauxite, leaching rate of Al2O3can reach 83.67%, higher than extraction rate of Al2O3 through bayer method. Then, direct reduction of calcification-carbonization residue is investigated. Metallization ratio of Fe is 80.5% when reduction temperature and time is 1050℃ and 2h respectively. Moreover, metallization ratio of Fe can reach 93.6% with the addition of additive A. After the “calcification-carbonization-direct reduction” process, valuable metals Al and Fe can be extracted effectively from high-iron bauxite. The main component of final residue is CaCO3 and CaSiO3, which can be directly applicable tothe cement industry.
||Planned: Light Metals Volume