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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Alumina & Bauxite
Presentation Title Study on Effective Extraction of Al and Fe from High-iron Bauxite through “Calcification-carbonization” Method
Author(s) Zhang Weiguang, Zhang Ting'an, Lv Guozhi, Zhang Xuhua, Zhu Xiaofeng, Wang Yanxiu, Wang Long
On-Site Speaker (Planned) Zhang Ting'an
Abstract Scope 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.
Proceedings Inclusion? Planned: Light Metals Volume


Alkalinity Precipitation Measurement on Carbonation of Bauxite Residue
An Improved Lime Sinter Process to Produce Al2O3 from Low-grade Al-containing Resources
Effect of Different Silica Mineral Compositions on the Digestion Results in Bayer Process
Effect of Lime Addition during Digestion on Stability of Digested Liquor of Diasporic Bauxite
Extraction of Alumina from the Magnetic Separation Tailings Derived from Reductive Roasting of Red Mud
Going FAR (Floating Alumina Refinery)
Industrial Implementation Characteristics of Aluminates Liquor Low-temperature Desilication Technology
Influence Factors of Stirring Speed of Self-stirring Tubular Reactor Used in Bauxite Digestion Process
Investigation of Flotation Behaviors of Refractory High Silica Bauxite
Leaching Kinetics for Recovering Alumina from Waste Tricalcium Aluminate Generated after Filtration of Bayer's Liquor
Reaction Behavior and Conversion of Anatase in Alumina Production Process with Calcification-carbonization Method
Research on Activated Alumina Obtained by Spray Pyrolysis Method
Study on Effective Extraction of Al and Fe from High-iron Bauxite through “Calcification-carbonization” Method
Study on the Influence of Chemical Additives during the Digestion of Bauxite
Sustaining Capital of Alumina Refinery Projects – Important but Unloved
Ways to Improve of Aluminium Content Raw Material Treatment by Sintering Method

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