Method of winning aluminum metal from aluminous ore
Aluminous ore such as bauxite containing alumina is blended with coke or other suitable form of carbon and reacted with sulfur gas at an elevated temperature. For handling, the ore and coke can be extruded into conveniently sized pellets. The reaction with sulfur gas produces molten aluminum sulfide which is separated from residual solid reactants and impurities. The aluminum sulfide is further increased in temperature to cause its decomposition or sublimation, yielding aluminum subsulfide liquid (A1S) and sulfur gas that is recycled. The aluminum monosulfide is then cooled to below its disproportionation temperature to again form molten aluminum sulfide and aluminum metal. A liquid-liquid or liquid-solid separation, depending on the separation temperature, provides product aluminum and aluminum sulfide for recycle to the disproportionation step.
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- TIC; ERA-05-024361; EDB-80-066796
- Patent Number(s):
- None
- OSTI ID:
- 5490121
- Country of Publication:
- United States
- Language:
- English
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Method of winning aluminum metal from aluminous ore
Method of winning aluminum metal from aluminous ore
Related Subjects
320000 -- Energy Conservation
Consumption
& Utilization
36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALUMINIUM
ALUMINIUM COMPOUNDS
ALUMINIUM ORES
ALUMINIUM SULFIDES
BAUXITE
CARBON
CHALCOGENIDES
CHEMICAL REACTIONS
COKE
ELEMENTS
ENERGY CONSERVATION
METALS
MINERALS
NONMETALS
ORES
PRODUCTION
REDUCTION
SEPARATION PROCESSES
SULFIDES
SULFUR
SULFUR COMPOUNDS