TREATMENT OF LEACH LIQUORS FOR UPGRADING A TITANIFEROUS MATERIAL

摘要

An industrially realistic process for alkaline leaching of a titaniferous material is disclosed. The process comprises the following process steps: (I) leaching the titaniferous material with an alkaline leachant to bring impurities in the titaniferous material into solution; and (II) treating the leachant to enhance the effectiveness of the leachant in the removal of impurities in step (I). In particular, step (II) may involve the heating of the leachant or adding additives such as sodium silicate or lime to cause the precipitation of alumina and silica.