The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 1984
Filed:
Jun. 14, 1983
Applicant:
Inventor:
John D Nauman, Natrona Heights, PA (US);
Assignee:
Allegheny Ludlum Steel Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21C / ;
U.S. Cl.
CPC ...
75 60 ; 75 59 ;
Abstract
An annular tuyere is provided having improved corrosion resistance, particularly at low gas flow rates and useful in the production of metal alloys. The tuyere may have a solid core defining an annulus between the core and an outer tubing. A method is also provided for raising the critical bath temperature at which the tuyere would melt and to minimize the gas flow necessary to cool the tuyere tip.