Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Reexamination Certificate
2007-10-31
2009-06-23
Mayes, Melvin C (Department: 1793)
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
C075S330000, C075S392000, C075S585000, C075S594000, C148S095000
Reexamination Certificate
active
07550027
ABSTRACT:
In order to provide a method for supplying a cover gas which has sufficient preventive effects of oxidation-combustion and prevents cost-increase by containing a necessary and sufficient amount of fluoroketone in the cover gas which is supplied in a melting furnace of magnesium, the present invention provides a method for supplying a cover gas containing fluoroketone in a melt furnace to prevent oxidation and combustion of a melt of magnesium in the melt furnace, wherein the moisture concentration of gas in the melt furnace is measured, and the concentration of fluoroketone in the cover gas is adjusted to a range from 1/50 to 1/5 relative to the moisture concentration.
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Nomura Yuji
Ohta Hidetoshi
Sanui Hiroshi
Mayes Melvin C
Nixon & Vanderhye P.C.
Oudenaren Sarah Van
Taiyo Nippon Sanso Corporation
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