Methods of processing aluminium dross and aluminium dross...

Details Methods of processing aluminium dross and aluminium dross... Methods of processing aluminium dross and aluminium dross...

C - Chemistry, Metallurgy

22

B

C22B 7/04 (2006.01) C01F 7/16 (2006.01) C21C 5/00 (2006.01) C21C 7/064 (2006.01)

Patent

CA 2172428

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°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.

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