METHOD OF PROCESSING ALUMINUM DROSS AND AL-DROSS RESIDUE INTO CALCIUM ALUMINATE

摘要

The processing of aluminium dross containing Al and Al2O3 originating from aluminium production, comprises the steps of separating aluminium from the dross to produce a dross residue and reacting the dross residue at a temperature above 1360 DEG C with a calcium-oxygen compound to form calcium aluminate as an at least partially melted material. To obtain a product specially suitable for use in steel-making, the calcium aluminate is rapidly cooled to form a glassy solid product. The two steps may be performed in the same vessel, which has a suitable refractory lining.