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:
Jun. 16, 1998
Filed:
Sep. 30, 1996
Applicant:
Inventors:
Shoji Miyagawa, Chiba, JP;
Hiroshi Itaya, Chiba, JP;
Tetsuya Fujii, Chiba, JP;
Yoshiaki Hara, Chiba, JP;
Assignee:
Kawasaki Steel Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
75378 ; 75419 ; 75660 ; 75665 ;
Abstract
Method and apparatus for collecting valuable products, particularly zinc, from a zinc-containing substance such as electric furnace dust. A shaft type smelting reduction furnace has a packed bed of a carbonaceous solid reducing agent and has upper and lower tuyeres, and a zinc-containing substance is injected through tuyeres to reduce and vaporize zinc, which is directly contacted by a liquid coolant thereby forming a slurry, and the zinc product is collected from the slurry.