Method for removing zinc from zinc-containing slags

Details Method for removing zinc from zinc-containing slags Method for removing zinc from zinc-containing slags

1977-05-10

1978-12-26

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 24, 75 88, C22D 706

Patent

active

041314514

ABSTRACT:
A method for removing zinc from zinc-containing slags resides in that zinc is recovered from a bath of said slag by introducing a reducing agent, such as coke, thereinto, and by further blowing nitrogen into said bath in an amount of 0.5 to 3.5 Nm.sup.3 /min.m.sup.2 of the bath surface and at a molten slag temperature of 1220 to 1400.degree. C, preferably within the range of from 1220 to 1290.degree. C.
The invention makes it possible to step up the rate of zinc recovery up to 2.3 kg/min.m.sup.2 of the bath surface, reduce power input by 30 to 40%, and thereby to cut down expenses involved in the process as a whole.

REFERENCES:
patent: 1815260 (1931-07-01), Kemmer
patent: 2685506 (1954-08-01), Schereschewsky

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