Zinc recovery from furnace dust

Details Zinc recovery from furnace dust Zinc recovery from furnace dust

1987-09-21

1989-01-24

Stoll, Robert L.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iva metal

423107, 75 25, C01G 1100, C01G 2116, C01G 904

Patent

active

048000698

ABSTRACT:
Zinc and other metals are recovered form strongly bound zinc ferrite compounds in furnace dust. To the dust is added 1 weight percent of free zinc oxide unless already present. The dust is treated for 1 hour at 750C with a 20:1 air:chlorine mixture whereby the zinc, lead and cadmium are removed from the dust as volatilised chloride.

REFERENCES:
patent: 3499754 (1970-03-01), Colombo et al.
patent: 3649245 (1972-03-01), Colombo et al.
patent: 4092152 (1978-05-01), Borbely
patent: 4259106 (1981-03-01), Aaltonen et al.

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