Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – By means introducing treating material
Patent
1994-08-03
1995-10-17
Andrews, Melvyn
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
By means introducing treating material
266268, 266270, C21C 548
Patent
active
054583209
ABSTRACT:
A tuyere for refining molten metals or melting metal scrap or oxides charged into a vessel. The tuyere comprises three concentric pipes of copper or stainless steel encased in refractory. An annular stream of natural gas surrounds an annular stream of oxygen which in turn surrounds a core stream of natural gas. All three streams are expanded as they flow through the tuyere and as a result an accretion forms at the tip of the tuyere. The accretion protects the tuyere and the gas streams are controlled so that the accretion is maintained at a desired size which neither blocks the tuyere, nor permits burnback of the pipes.
REFERENCES:
patent: 4249719 (1981-02-01), Knuppel et al.
Baukal, Jr. Charles E.
Farmer Larry K.
Lanyi Michael D.
Winchester David C.
Andrews Melvyn
Gas Research Institute
Simmons James C.
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