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. 09, 2002
Filed:
Oct. 05, 2000
Applicant:
Inventors:
Akira Yazawa, Sendai, JP;
Yoichi Takeda, Morioka, JP;
Nozomu Hasegawa, Tokyo, JP;
Yoshiaki Mori, Hyuga, JP;
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
C22B 1/500 ;
U.S. Cl.
CPC ...
C22B 1/500 ;
Abstract
A method of oxygen-smelting copper sulfide concentrate to obtain white metal, nearly white metal matte or blister copper by removing most of the Fe in the copper sulfide concentrate into the slag as well as removing part or most of the S therein as SO wherein oxygen-smelting is carried out to produce; slag in which a weight ratio of CaO to (SiO +CaO) is 0.3 to 0.6 and a weight ratio of Fe to (FeOx+SiO +CaO) is 0.2 to 0.5, and white metal, nearly white metal matte or blister copper, by adding SiO material and CaO material to the copper sulfide concentrate as flux.