Continuous reflux refining of metals

Details Continuous reflux refining of metals Continuous reflux refining of metals

C - Chemistry, Metallurgy

22

B

39/104, 53/357

C22B 9/00 (2006.01) B01D 9/00 (2006.01) C22B 9/02 (2006.01)

Patent

CA 1048790

CONTINUOUS REFLUX REFINING OF METALS ABSTRACT OF THE DISCLOSURE A method and apparatus are described for the continuous refining of an impure metal. The invention comprises providing a column consisting of a slurry of metal crystals in liquid metal, the column having a relatively cool zone and a relatively hot zone and a continuous temperature gradient between said zones. The temperature of the cool zone is such as to permit coexistence of liquid and crystalline metal, and the hot zone is at a temperature sufficient to melt the crystals. A portion of the column in the cool zone is chilled to form a coherent mass of crystals of the metal and then incipient melting in the mass is allowed to occur to release crystals from the mass into the column of the crystals in the liquid metal in the cool zone of the column. The crystals are transported through the temperature gradient and into the hot zone, where melting of the crystals occurs and the hot zone thereby becomes enriched with the pure liquid metal.

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