Direct smelting process for non-ferrous metal sulfide ores

Details Direct smelting process for non-ferrous metal sulfide ores Direct smelting process for non-ferrous metal sulfide ores

1988-01-22

1990-01-23

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 21, 75 77, 75 88, 75 92, C22B 1300

Patent

active

048955957

ABSTRACT:
Smelting is effected in a reactor containing juxtaposed oxidizing and reducing zones. The slag baths in the two zones communicate with each other. The slag baths of the two zones communicate with each other, the materials are charged into the slag bath in the oxidizing zone and oxygen-containing gases are blown into the slag bath in the oxidizing zone, a slag which is rich in non-ferrous metal oxides is passed from the oxidizing zone into the reducing zone, reducing agent and oxygen-containing gases are blown into the slag in the reducing zone at such respective rates that the non-ferrous metal oxides are substantially completely reduced and a phase that is rich in non-ferrous metal is formed, a slag which is poor in non-ferrous metal is tapped from the reducing zone, gases are separately sucked from the oxidizing and reducing zones, and the subatmospheric pressures in the suction lines connected to the oxidizing and reducing zones are so controlled that a zero differential pressure is obtained adjacent to the boundary between the oxidizing and reducing zones.

REFERENCES:
patent: 2769706 (1956-11-01), Herneryd et al.
patent: 4252560 (1981-02-01), Vanjukov et al.
patent: 4414022 (1983-11-01), Melcher

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