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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Alumina and Bauxite
Presentation Title Disc Magnetic Separator Applied to the Extraction of Magnetite in Bauxite Residue
Author(s) Yoann Robert, Guy Simard, Sebastien Fortin
On-Site Speaker (Planned) Yoann Robert
Abstract Scope The valorization of bauxite residue generated by the Bayer process is a major challenge for the alumina industry. Iron oxides, mainly goethite and hematite, represent 20 to 50% of the bauxite residue content. Many reports describe a reduction of these species to magnetic ones, followed by magnetic separation, but no commercial success has been reported to date. The initial steps of our study on such magnetic separation process, using a home-made lab-scale disc magnetic separator, allowed for the quantification of key parameters, such as solids concentration, feed flow rate, rotation velocity, etc. In order to properly evaluate the various parameters’ influence, and the efficiency of the separation process, an ideal mixture of magnetic and non magnetic material was prepared and submitted to the disc magnetic separator. The collected material is enriched to more than 90 wt.% magnetic content, from an initial 30 wt.%.
Proceedings Inclusion? Planned: Light Metals

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Digital Refinery Approach to Process Troubleshooting and Improvements
A Review of Comprehensive Utilization of High-iron Red Mud of China
Application of Advanced Oxidative Process for Organic Compounds Removal from Bayer Liquor
Bayer Process Towards the Circular Economy – Metal Recovery from Bauxite Residue
Bayer Process Towards the Circular Economy – Soil Conditioners from Bauxite Residue
Brazilian Bauxite Residue Physical-chemical Characterization and Acidic Neutralization Potential
Conversion Behavior of Iron-containing Minerals in the Process of Dissolving High-iron Bauxite by Starch Hydrothermal Method
Disc Magnetic Separator Applied to the Extraction of Magnetite in Bauxite Residue
Effect of Concentrations and Pressures of CO2 on Calcification-Carbonation Treatment of Bauxite residue
Effects of the Granular Properties of Bauxite Pisolites on the Solid/Liquid Separation in Liquid Fluidized Beds of Classifiers
F-4: Investigation on Heat Resisting Cast Iron Produced Through Carbothermic Reduction of Alumina Residue (Bayer Red Mud)
Impacts of Mineralogy on Soluble Phosphorus Concentrations During Low Temperature Processing of Jamaican Bauxites
Improved Technology of Scandium Recovery from Solutions of Bauxite Residue Carbonation Leaching
Inhibition of Kaolinite Dissolution in Bayer Liquor Through Addition of Lithium
Ionic Effect of NaCl and KCl on the Flotation of Diaspore and Kaolinite using Sodium Oleate as Collector
Mineralogical Assessment of the Solid Phase Obtained on Leaching of Brazilian Red Mud
Quantifying the Effect of Seeds on Gibbsite Crystallization – Mathematical Modelling of Particle Size Distribution
Recovery of Iron from High-iron Bayer Red Mud by Smelting Reduction
The Alumina Technology Roadmap 4.0.

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