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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Alumina and Bauxite
Presentation Title Impacts of Mineralogy on Soluble Phosphorus Concentrations During Low Temperature Processing of Jamaican Bauxites
Author(s) Michael Delroy Coley, Anthony Michael Greenaway, Khadeen Elizabeth Henry-Herah
On-Site Speaker (Planned) Michael Delroy Coley
Abstract Scope Jamaica’s bauxite reserves are primarily from pocket deposits with highly variable mineral characteristics. Traditionally, local refineries process low phosphate hematite-rich bauxites however current resources tend towards higher phosphate concentrations which are primarily goethitic. Bauxites from different mining locations may have identical total phosphorus concentrations but differ widely in their caustic soluble phosphorus. This study compares bauxites with similar total phosphorus concentrations and examines the impacts of their phosphorus, alumina, iron, calcium, silica and titanium mineralogies on phosphorus extraction during low temperature digestion. Bauxite elemental concentrations were determined via XRF while mineralogy was characterized using XRD and the XDB programme. Caustic soluble phosphorus was measured using the molybdenum blue ascorbic acid spectrophotometric procedure. The phosphorus and calcium mineralogies were found to have the greatest impacts on low temperature caustic soluble phosphorus concentrations and, along with other parameters, have been used to predict caustic soluble P-concentrations for bauxites of widely differing characteristics.
Proceedings Inclusion? Planned: Light Metals


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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