Method of making pig iron with zinc recovery

Details Method of making pig iron with zinc recovery Method of making pig iron with zinc recovery

1995-05-24

1996-10-22

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75658, 75961, C21B 1100, C22B 702, C22B 1904

Patent

active

055672256

ABSTRACT:
A method making pig iron employs an in-bath direct reduction performed in a metallurgical vessel which has above it a melting cyclone in which iron-oxide-containing material fed thereinto is pre-reduced by hot reducing gas coming from the vessel. Molten material passes downwardly from the melting cyclone into the vessel. In order to recover zinc from a dust containing zinc and/or zinc oxide, the dust is fed into the melting cyclone. Zinc is allowed to vaporize out of the dust into the hot gas in the melting cyclone. The hot gas containing zinc is discharged from the melting cyclone, and zinc-containing material is extracted from this hot gas.

REFERENCES:
patent: 3915692 (1975-10-01), Herbert et al.
patent: 4200454 (1980-04-01), Maelzer et al.
patent: 4878943 (1986-09-01), Kepplinger
patent: 5364441 (1994-11-01), Worner

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