Method for forming metals with reduced impurity concentrations

Details Method for forming metals with reduced impurity concentrations Method for forming metals with reduced impurity concentrations

1987-01-16

1988-12-13

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 63, 75 65R, C22B 900

Patent

active

047908742

ABSTRACT:
A method of purifying molten metal that reduces the amount of contaminants therein by maintaining the molten metal in a quiescent state allowing buoyant impurities in the metal to float to the top. The top of the molten metal is cooled solidifying the top portion and entrapping the impurities in the solid layer. The molten metal is then cast from beneath the solid portion.

REFERENCES:
patent: 975955 (1910-11-01), Hughes
patent: 1037538 (1912-09-01), Rockey et al.
patent: 3955970 (1976-05-01), Claxton et al.
patent: 4221590 (1980-09-01), Dawless

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