Heavy Metals as Impurities in the Bayer Production Cycle of the Aluminum Hydroxide from Sierra Leone Bauxite. Preliminary Study

This paper is reporting the data of a preliminary study on heavy metals distribution in fluid and solid phases involved dry classified aluminium hydroxide production through Bayer process. For released phases, main source contamination bauxite its mineralogical soluble or insoluble alkaline solution. It was shown that predominant way to transfer contaminating elements particles occlusion very fine coming from residue. New born residue, like poor crystallized sodalite cancrinite, are most active contaminants