Process for treating zinc-laden dust issuing from electric steel

Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium

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75 05AA, 75109, 75120, 423104, 423109, 423150, 204116, C22B 1924

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046067655

ABSTRACT:
In a hydrometallurgical process of treating zinc-laden dust issuing from electric steel plant furnaces the zinc-laden dust is subjected to a basic leaching or lixiviation in two steps. The dust is subjected to a first leaching of the zinc oxide with a relatively low concentration of caustic soda, then to a second leaching of the zinc ferrite with a higher concentration of caustic soda, then the zinc is extracted from the solution obtained by this basic leaching.

REFERENCES:
patent: 1719056 (1929-07-01), Horsch
patent: 2305829 (1942-12-01), Pieper
patent: 3248212 (1966-04-01), Mellgren et al.
patent: 3743501 (1973-07-01), Cusanelli et al.
Chemical Abstracts, vol. 97, No. 18, of Feb. 1982, Abstract No. 147,010Q, at page 134.

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