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Title: Method of winning aluminum metal from aluminous ore

Abstract

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.

Inventors:
 [1];  [1];  [2]
  1. (Naperville, IL)
  2. (Clarendon Hills, IL)
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
863879
Patent Number(s):
4265716
Assignee:
United States of America as represented by United States (Washington, DC) ANL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; winning; aluminum; metal; aluminous; bauxite; containing; alumina; blended; coke; suitable; form; carbon; reacted; sulfur; gas; elevated; temperature; handling; extruded; conveniently; sized; pellets; reaction; produces; molten; sulfide; separated; residual; solid; reactants; impurities; increased; decomposition; sublimation; yielding; subsulfide; liquid; recycled; monosulfide; cooled; below; disproportionation; liquid-liquid; liquid-solid; separation; depending; provides; product; recycle; step; aluminum sulfide; elevated temperature; aluminum metal; molten aluminum; sulfur gas; residual solid; solid reactants; form molten; provides product; /205/75/

Citation Formats

Loutfy, Raouf O., Keller, Rudolf, and Yao, Neng-Ping. Method of winning aluminum metal from aluminous ore. United States: N. p., 1981. Web.
Loutfy, Raouf O., Keller, Rudolf, & Yao, Neng-Ping. Method of winning aluminum metal from aluminous ore. United States.
Loutfy, Raouf O., Keller, Rudolf, and Yao, Neng-Ping. Thu . "Method of winning aluminum metal from aluminous ore". United States. https://www.osti.gov/servlets/purl/863879.
@article{osti_863879,
title = {Method of winning aluminum metal from aluminous ore},
author = {Loutfy, Raouf O. and Keller, Rudolf and Yao, Neng-Ping},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}

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