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Class Information
Number: 75/557
Name: Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures > Processes > Producing or treating free metal > At 300 degrees c or greater (e.g., pyrometallurgy, etc.) > Iron(fe) > Melting iron(fe) or treating molten iron > Injecting gas or nonmetalliferous liquid which gasifies into, onto, or through premelted iron(fe) or slag layer thereon > Gas contains gaseous oxygen > Injecting only from below melt surface > Including other gas from below
Description: Process wherein a gas other than Oxygen gas or an Oxygen gas containing gas composition is injected from below the melt surface at the same time or at a different time during the processing.










Patents under this class:

Patent Number Title Of Patent Date Issued
6461404 Ladle for enhanced steel vacuum decarburization Oct. 8, 2002
5858059 Method for injecting feed streams into a molten bath Jan. 12, 1999
5211743 Treatment of a melt with a gas and means therefor May. 18, 1993
4615730 Method for refining molten metal bath to control nitrogen Oct. 7, 1986
4614540 Process for the removal of contaminating elements from pig-iron, steel, other metals and metal alloys Sep. 30, 1986
4568386 Process for purifying metals by insufflation and product produced thereby Feb. 4, 1986
4555266 Method and apparatus for treating liquid metal in a vessel Nov. 26, 1985
4529442 Method for producing steel in a top oxygen blown vessel Jul. 16, 1985
4529443 System and method for producing steel in a top-blown vessel Jul. 16, 1985
4514220 Method for producing steel in a top-blown vessel Apr. 30, 1985
4450005 Metal refining method May. 22, 1984
4395283 Method of switching bottom-blown gases and apparatus therefor Jul. 26, 1983
4394165 Method of preliminary desiliconization of molten iron by injecting gaseous oxygen Jul. 19, 1983
4321088 Process for treating pig iron melts and steel melts or alloys Mar. 23, 1982
4315772 Process for steel production and converter for carrying out the process Feb. 16, 1982
4290306 Method and apparatus for probing into a refining furnace or the like for temperature measurement for sampling, or for both Sep. 22, 1981
4260415 Decarburizing molten metal Apr. 7, 1981
4253868 Apparatus for nitriding metal materials and ferroalloys under pressure Mar. 3, 1981
4208206 Method for producing improved metal castings by pneumatically refining the melt Jun. 17, 1980
4188206 Metallurgical process Feb. 12, 1980
4165234 Process for producing ferrovanadium alloys Aug. 21, 1979
4141723 Process for producing stainless steel Feb. 27, 1979
RE29584 Use of CO.sub.2 in argon-oxygen refining of molten metal Mar. 21, 1978
4045213 Method of injecting a powder containing carbon into a metal bath Aug. 30, 1977
4021233 Metallurgical process May. 3, 1977
4004920 Method of producing low nitrogen steel Jan. 25, 1977
3990888 Decarburization of a metal melt Nov. 9, 1976
3940263 Steelmaking with inert gas blowing Feb. 24, 1976
3930843 Method for increasing metallic yield in bottom blown processes Jan. 6, 1976











 
 
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