Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1982-12-08
1986-08-26
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 82, 75 92, C22B 1506
Patent
active
RE0322342
ABSTRACT:
A method of converting a charge of non-ferrous metal matte in a Pierce-Smith or similar converter. The fluid charge is blown with a total flow of oxidizing gas containing up to about 40% oxygen effective to maintain autogenous converting temperatures through a plurality of spaced-apart tuyeres limited in number and individual cross-sectional area effective to maintain the gas underexpanded at a pressure within the range from about 50 to about 150 psig so that it penetrates the bath in the form of discrete steady unshielded jets to positions remote from the tuyere tips thereby reducing degradation of the refractories and build up of accretions. The gas is injected through from three to six tuyeres.
REFERENCES:
patent: 3627510 (1971-12-01), Vogt et al.
patent: 3819362 (1974-06-01), Bushaw et al.
patent: 3832163 (1974-08-01), Themelis et al.
patent: 3990889 (1976-11-01), Queneau et al.
A. K. Biswas et al, "Extractive Metallurgy of Copper", Pergamon, 1976, pp. 12-14, 176-203 and 242-245.
J. K. Brimacombe et al, "High-Pressure Injection of Air into a Pierce-Smith Copper Converter", 1983.
Brimacombe J. Keith
Hoefele Enrique O.
Andrews Melvyn J.
Canadian Liquid Air Ltd.
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