PROCESS FOR THE PRODUCTION OF ALUMINIUM CHLORIDE

摘要

Aluminium chloride is produced by the chlorination of alumina containing a substantial proportion of alpha-alumina in a fluidised bed having an expanded depth greater than 2.5 m and containing a reactive coke or active carbon the temperature of chlorination being greater than 775 DEG C. The invention is particularly applicable to iron-containing aluminous feedstocks susceptible to the formation of alpha-alumina, such as bauxite and may utilise a preliminary beneficiation stage under high temperature conditions which have heretofore been avoided as encouraging alpha-alumina formation.