METHOD AND APPARATUS FOR THE PRODUCTION OF ALUMINIUM FROM ALUMINA ORE BY ALUMINIUMSULFIDE PROCESS

摘要

Method for the production of primary aluminium from alumina comprising the step of converting alumina into aluminiumsulfide (Al2S3) and subsequently the separation of aluminium from aluminiumsulfide wherein the conversion of alumina into aluminiumsulfide is performed by reacting alumina with CS2 containing gas at a temperature Tal whereby the alumina is mainly gamma -alumina. Apparatus for performing the method comprises a first reactor (1) for the manufacture of CS2, a second reactor (5) for the manufacture of Al2S3 from CS2 and Al2O3, and a third reactor (8), preferably an electrolysis cell, for the manufacture of Al from Al2S3.