Method of retarding the cooling of molten metal

Details Method of retarding the cooling of molten metal Method of retarding the cooling of molten metal

1978-01-23

1980-01-01

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

164 66, 252 70, C22B 900

Patent

active

041815220

ABSTRACT:
The cooling of molten metal, such as metal continuously cast into an ingot mold, is retarded by establishing on the upper surface of the metal in the mold, a layer of cryogenic liquid such as nitrogen, helium or argon, with a finely divided material in homogeneous and stable suspension in the liquid. The finely divided material is in the form of particles having a size between 200 and 2,000 A and is present in a quantity between 10 and 1,000 grams per liter of cryogenic liquid. The suspended material may be aluminum, titanium, zirconium, niobium, calcium, lithium, magnesium, solid glass, or an oxide of aluminum, titanium, zirconium, niobium, calcium, lithium or magnesium, and is highly reflective to infrared radiation from the metal so as to reduce the transparency of the cryogenic liquid to this infrared radiation.

REFERENCES:
patent: 3416977 (1968-12-01), Rein
patent: 3868987 (1975-03-01), Galey et al.

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