Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – Means applying centrifugal force
Patent
1978-11-20
1981-04-14
Rosenberg, P. D.
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
Means applying centrifugal force
266227, 266233, C22B 902, C21B 304
Patent
active
042615534
ABSTRACT:
In many situations it is desirable for two or more liquid phases of different densities to be contained in a vessel with the upper phase out of contact with the vessel walls. Such a situation is the refining of molten metals, e.g., copper, wherein a layer of corrosive slag exists in the refining process above the molten metal. In conventional furnaces the slag will attack the furnace walls.
This invention provides a method which can be employed in such situations comprising two or more liquid phases of different densities in a vessel having an axis which is substantially vertical, rotating the liquid phases about the axis of the vessel and simultaneously constraining the least dense liquid phase to rotate less rapidly than the most dense liquid phase such that the miniscus of the least dense liquid phase adopts a degree of curvature less than the degree of the interface between the least dense liquid phase and the phase immediately below and the least dense liquid phase does not contact the internal surface of the vessel.
Such a method can, for example, also be employed in extraction procedures between liquid phases in addition to its application in metal refining.
The invention also provides a suitable vessel and apparatus for the method.
REFERENCES:
patent: 3764296 (1973-10-01), Gerlach
patent: 3843351 (1974-10-01), Smith
patent: 3917479 (1975-11-01), Sayce
"Continuous Steelmaking", Steel Times, pp. 323-324, (Mar. 17, 1967).
National Research Development Corporation
Rosenberg P. D.
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