发明名称 |
Method of winning aluminum metal from aluminous ore |
摘要 |
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.
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申请公布号 |
US4265716(A) |
申请公布日期 |
1981.05.05 |
申请号 |
US19790048332 |
申请日期 |
1979.06.14 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE UNITED STATES DEPARTMENT OF ENERGY |
发明人 |
LOUTFY, RAOUF O.;KELLER, RUDOLF;YAO, NENG-PING |
分类号 |
C22B21/02;C01F7/70;C22B21/00;C25C3/06;(IPC1-7):C22B21/02 |
主分类号 |
C22B21/02 |
代理机构 |
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代理人 |
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地址 |
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