Treatment of spent potliner used in aluminium smelting process

摘要

A method of treating a spent potliner after use in an aluminium smelting process is disclosed, wherein the method comprises crushing and classifying the spent potliner, placing the classified and crushed spent potliner in a furnace at a temperature greater than 450 DEG C, heating the spent potliner to a temperature greater than 450 DEG C, mixing the heated spent potliner with water to produce reaction gases and residue, burning the reaction gases, mixing the residue with water in a well ventilated area for a period of weeks to cure the residue. The method also embraces blending the cured residue with other chemicals and minerals to provide specific mineral products.