Recovery of free aluminum from aluminum dross using plasma energ

Details Recovery of free aluminum from aluminum dross using plasma energ Recovery of free aluminum from aluminum dross using plasma energ

1989-09-18

1991-03-05

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

C22B 400

Patent

active

049974769

ABSTRACT:
A process for recovering free aluminum and aluminum compounds such as aluminum oxide from aluminum dross in a rotary furnace heated with a plasma arc torch wherein air is preferably utilized as the arc gas is described. The use of the rotary furnace heated with plasma energy eliminates the need for a salt flux, providing a process which is ecologically safe and cost effective. A process of converting non-metallic aluminum compounds to substantially pure aluminum oxides by heating the compounds with a plasma torch operating with an oxidizing gas as the plasma torch arc gas is also described.

REFERENCES:
patent: 4177060 (1979-12-01), Tylko
patent: 4523949 (1985-06-01), Gower

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