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:
Feb. 24, 2015
Filed:
Oct. 27, 2009
Daishi Ochi, Niihama, JP;
Hideyuki Okamoto, Niihama, JP;
Yoshihisa Takahashi, Niihama, JP;
Yuji Aoki, Niihama, JP;
Hiroichi Miyashita, Niihama, JP;
Shigeto Kuroiwa, Niihama, JP;
Daishi Ochi, Niihama, JP;
Hideyuki Okamoto, Niihama, JP;
Yoshihisa Takahashi, Niihama, JP;
Yuji Aoki, Niihama, JP;
Hiroichi Miyashita, Niihama, JP;
Shigeto Kuroiwa, Niihama, JP;
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Abstract
There is provided a method for separating an arsenic mineral from a copper-bearing material containing arsenic, such as a copper ore or a copper concentrate, to obtain a copper concentrate with low arsenic grade. The method for separating an arsenic mineral from a copper-bearing material by flotation includes adding a flotation agent containing a depressant, a frother, and a collector to a slurry composed of a copper-bearing material containing arsenic, and blowing air into the slurry to float a copper concentrate, wherein the depressant is sodium thiosulfate. The sodium thiosulfate is preferably added in an amount of 10 kg or more and 200 kg or less in terms of sodium thiosulfate pentahydrate per ton of copper-bearing material to be subjected to flotation. Further, the oxidation-reduction potential of the slurry to be subjected to flotation, as measured against a silver/silver chloride reference electrode, is preferably −10 mV or more and 50 mV or less.