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:
Aug. 23, 1977
Filed:
Sep. 30, 1975
Applicant:
Inventors:
Hiroshi Yamaoka, Hirakata, JA;
Morio Kawasaki, Nishinomiya, JA;
Hideyasu Kawanami, Wakayama, JA;
Toshihiro Shiino, Osaka, JA;
Junichi Yamashita, Wakayama, JA;
Assignee:
Sumitomo Metal Industries Limited, Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21B / ;
U.S. Cl.
CPC ...
266270 ;
Abstract
Tuyeres for a blast furnace are disclosed wherein a coating is formed on the inner and outer peripherential surfaces of the tuyere body by subjecting the surfaces to a calorizing treatment to diffuse a diffusion agent comprising a powdery mixture of alumina and aluminum at a treating temperature of about 800.degree. C. The tuyere body is shaped so as to form an inner jacket, and the walls of the tuyere body forming the inner jacket may also be subjected to a calorizing treatment.