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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Alumina & Bauxite
Presentation Title Effect of Lime Addition during Digestion on Stability of Digested Liquor of Diasporic Bauxite
Author(s) Tao Jiang, Xiao-lin Pan, Haiyan Yu, Xianlin Hou, Ganfeng Tu, Yu Lu, Ren Zhang
On-Site Speaker (Planned) Xiao-lin Pan
Abstract Scope The hydrolysis loss of digested alumina from bauxite reentering into the bauxite residue during the Bayer process has been always the research focus of the enterprises and researchers. The stability of sodium aluminate solution after digestion with different lime additions during the dilution process from a diasporic bauxite was studied, and the mechanism by which the lime addition affects was also discussed. The molar ratio, silica index and hydrolysis degree of diluted liquor after digestion are highly affected by the lime addition, and the corresponding alumina extraction efficiency of bauxite and the Na2O to SiO2 ratio of bauxite residue are changed. The stability of diluted liquor is firstly increased by the lime addition below 15% of the bauxite, and then decreased as the lime addition increases. The mineral content and proportion of desilication products precipitating during digestion are the main factors affecting the stability of sodium aluminate solution after digestion.
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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