Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – By means introducing treating material
Patent
1991-02-05
1992-03-10
Rosenberg, Peter D.
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
By means introducing treating material
75526, 420590, C21C 700
Patent
active
050944320
ABSTRACT:
A container for adding to a liquid metal of known density and melting point an additive metal of lower density. The container comprises a tube portion of defined cross-section formed of a metal having a melting point higher than the melting point of the liquid metal and which can alloy with the liquid metal without being a source of pollution, and an insert comprising the additive metal placed within the tube portion. The tube portion has at least one end portion constricted so as to leave a passage with a cross-section smaller than the defined cross-section of the tube, the ratio of the passage cross-section to the tube cross-section being from 1:10 to 1:1000. The container overall has a density greater than the density of the liquid metal, so that it sinks when placed within a bath of the liquid metal. This invention finds application in modifying aluminum-silicon alloys with sodium, and additive metal which is lighter than and floats on a bath of liquid aluminum-silicon alloy.
REFERENCES:
patent: 4043798 (1977-08-01), Nashiwa
patent: 4711663 (1987-12-01), Ferrari
Marguier Alain
Petit Yves
Aluminium Pechiney
Rosenberg Peter D.
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