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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Alumina and Bauxite
Presentation Title Revisiting Alternative Smelter Grade Alumina Production Processes
Author(s) Andrey V. Panov, Alexander Senyuta, Andrey Smirnov
On-Site Speaker (Planned) Andrey V. Panov
Abstract Scope In recent decades there is an increasing interest for alternative processes for smelter grade alumina production driven by intentions of producers to save on transportation costs of bauxite and alumina, to reduce the CO2 footprint and to solve the issue of alkaline bauxite residue generated currently by the Bayer process. Besides, new technologies can use high-silica feedstock located close to aluminum smelters, like kaolin clays or fly ash. The presentation shows the benefits and prospects of implementation of the new technologies in the world, and status of the development. One of such examples is UC RUSAL’s development of the alumochloride technology to produce smelter grade alumina from local kaolin feedstock. The technology and the quality of SGA were tested and approved at the mini-plant scale, and a pilot unit has already been designed. The main benefits comprise low operational costs and flexibility in selecting the raw material as it enables the use of virtually inexhaustible sources of aluminum bearing raw material, i.e. aluminum silicate ores, and thus allows reducing the transport and logistics costs. There are also other methods to produce alumina including the Pedersen process, which is currently being revisited under the Ensureal project funded under the EU Horizon 2020 program.
Proceedings Inclusion? Planned: Light Metals


Alumina Refinery Volume Control
Bauxite Residue Neutralization Potential Using Biogenic Sulfuric and Citric Acids
Gravity Methods Applied to Bauxite Residue for Mineral Pre-concentration
Implementation of Digital Technologies in Alumina Refining: A Producer Experience
Introductory Comments: Alumina and Bauxite
Revisiting Alternative Smelter Grade Alumina Production Processes
Silicon Rich Iron Alloy from Bauxite Residue
The Application of Intelligent Control to Red Mud Settling and Washing in Alumina Refinery

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