Method for leaching copper concentrate

Details Method for leaching copper concentrate Method for leaching copper concentrate

2005-08-16

2005-08-16

Andrews, Melvyn (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

C423S034000, C423S140000

Reexamination Certificate

active

06929677

ABSTRACT:
This invention relates to a method where sulfidic iron-bearing copper concentrate is leached on the countercurrent principle, in a chloride environment. The leaching takes place with the aid of bivalent copper and an oxygen-bearing gas as a multi-stage continuous process, under normal pressure, at a temperature, which as highest corresponds to the boiling point of the solution. Part of the insoluble solid matter is returned, counter to the main flow of solid matter, to one of the previous leaching stages or reactors where, as a result of the extended leaching time, the leach waste iron is recovered mostly as hematite.

REFERENCES:
patent: 3972711 (1976-08-01), Goens et al.
patent: 4148698 (1979-04-01), Everett
patent: 4197117 (1980-04-01), Pemsler et al.
patent: 5487819 (1996-01-01), Everett
patent: 6007600 (1999-12-01), Hyvarinen et al.

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