Production of blister copper directly from dead roasted-copper-i

Details Production of blister copper directly from dead roasted-copper-i Production of blister copper directly from dead roasted-copper-i

1975-05-30

1977-02-01

Satterfield, Walter R.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 72, 75 73, C22B 1500

Patent

active

040060101

ABSTRACT:
A method is provided for producing blister copper from calcined copper-iron sulfide concentrates wherein the calcine containing copper ferrite is mixed with particulate carbonaceous reducing agent and charged into a smelting furnace, slag-forming ingredients being also added to slag off iron oxide. The charge, in the form of a shallow bed, is smelted by applying heat whereby the temperature is raised to above the melting point of copper, the copper oxide being selectively reduced to form blister copper, the iron oxide being reduced to form substantial amounts of ferrous oxide, the iron oxide combining with SiO.sub.2 present in the charge to form a slag and assure a low-iron copper product. Following reduction of the copper to molten blister copper, it is separated from the slag for further purification treatment, the slag being further treated when necessary to recover contained copper therefrom.

REFERENCES:
patent: 3351462 (1967-11-01), Arentzen et al.
patent: 3432289 (1969-03-01), Spitz et al.
patent: 3669646 (1972-06-01), Cullom
patent: 3799764 (1974-03-01), Opie et al.
patent: 3844765 (1974-10-01), Baum
patent: 3849120 (1974-11-01), Norman
patent: 3857701 (1974-12-01), Hunter et al.

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