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 (Als) 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.
- Assignee:
- Department of Energy
- Patent Number(s):
- US 4265716
- OSTI ID:
- 6028272
- Resource Relation:
- Patent File Date: Filed date 14 Jun 1979
- 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
ALUMINIUM
RECOVERY
ALUMINIUM ORES
ORE PROCESSING
ALUMINIUM OXIDES
ALUMINIUM SULFIDES
BAUXITE
COKE
ENERGY CONSUMPTION
PELLETS
RECYCLING
SULFUR
VERY HIGH TEMPERATURE
ALUMINIUM COMPOUNDS
CHALCOGENIDES
ELEMENTS
METALS
MINERALS
NONMETALS
ORES
OXIDES
OXYGEN COMPOUNDS
PROCESSING
SULFIDES
SULFUR COMPOUNDS
320303* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes