Metallurgical apparatus – Means for extracting and refining metal
Patent
1980-07-30
1981-10-13
Andrews, M. J.
Metallurgical apparatus
Means for extracting and refining metal
266189, 266201, 266215, 266221, 266230, F27B 120
Patent
active
042944333
ABSTRACT:
A method for processing heavy nonferrous metal raw materials by heating and melting said raw materials in a molten slag with the formation of a heterogeneous melt consisting of a sulfide and an oxide phases. The melt is bubbled oxidized by injecting a gas containing not less than 35% oxygen at an intensity of about 200 to about 2000 m.sup.3 STP/h per square meter of horizontal section of the melt, with the effect that the melt is divided into a top bubbled part and a bottom calm part comprising a slag layer, a matte layer and/or a crude metal layer, each of which is tapped separately. A furnace for putting said method into effect is a shaft terminating in its bottom part by a hearth and having devices for tapping smelting products, whereas the top part is provided with orifices for feeding a charge and removing gaseous smelting products. The furnace has cooled side tuyeres set at a level dividing the shaft into two vertical parts. The device for tapping slag from the bottom part of the slag layer is formed with a recipient communicating with the internal cavity of the shaft by means of a duct arranged below the tuyere level, but above the level of the matte inside the shaft. Said technological sequence of operations and the furnace design provide a possibility of separating polymetallic raw materials by a single-stage process into smelting products and denuded slag. It is most effective to employ the present invention for processing high-sulfur copper, nickel, copper-nickel and copper-zinc raw materials.
REFERENCES:
patent: 2862810 (1958-12-01), Alexandrovsky
patent: 3326672 (1967-06-01), Worner
patent: 3892559 (1975-07-01), Quarm
patent: 4005856 (1977-02-01), Themelis et al.
patent: 4208041 (1980-06-01), Jordanov et al.
Alexandrov Petr A.
Bystrov Valentin P.
Ezhov Evgeny I.
Golik Sergei Y.
Grechko Alexandr V.
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