Cold hearth refining

Details Cold hearth refining Cold hearth refining

1989-06-08

1990-10-09

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 1065, 266214, C22B 400

Patent

active

049617761

ABSTRACT:
In the particular embodiments of the invention described in the specification, a hearth for melting and refining metal has a hearth bed with cooling pipes so that a skull of molten metal is formed and energy input devices are directionally controlled to permit the skull to form a barrier between a melting region where solid material is introduced into the hearth and a refining region where molten material is refined before being poured into a mold. In one embodiment, the barrier formed by the skull provides a dam with a narrow channel between the melting region and the refining region, and in another form, the barrier provided by the skull consists of spaced peninsulas extending from opposite sides of the hearth to provide a serpentine path between the melting region and the refining region.

REFERENCES:
patent: 3342250 (1967-09-01), Treppschuh
patent: 4105438 (1978-08-01), Sherwood

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