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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Alumina & Bauxite
Presentation Title Effect of Different Silica Mineral Compositions on the Digestion Results in Bayer Process
Author(s) Minghui Luo, Cao wenzhong, Zhang Liping
On-Site Speaker (Planned) Minghui Luo
Abstract Scope The bauxite in the northern region of China belongs to diasporic type ore with high silica. The main silica minerals in the bauxite is kaolinite,illite and chamosite.Technological investigations were carried out based on the Bayer process.The presence of high silica causes high bound-soda losses in the red mud and the decrease of leaching rate. The dissolution behavior of different silicate minerals has obvious effect on the digestion of bauxite.Predesilication characteristic of the bauxite, the effects of dissolution temperature and retention time on Al2O3 digestion efficiency were determined. Experiment results showed that of chamosite and illite mineral characteristics and characteristics of dissolved helped to lower alkali consumption to improve the digestion rate of bauxite.
Proceedings Inclusion? Planned: Light Metals Volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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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