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:
Oct. 14, 2008
Filed:
Apr. 14, 2005
Yoshiyuki Tanaka, Ehime, JP;
Ryoichi Nakayama, Ehime, JP;
Hideyuki Okamoto, Ehime, JP;
Masaki Imamura, Ehime, JP;
Yoshiyuki Tanaka, Ehime, JP;
Ryoichi Nakayama, Ehime, JP;
Hideyuki Okamoto, Ehime, JP;
Masaki Imamura, Ehime, JP;
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Abstract
By suppressing oxidation of sulfide minerals in sulfide ore due to bacteria or the like, this invention prevents the elution of heavy metals from the sulfide ore, and reduces the decrease in flotation performance when processing sulfide ore that is stored in a stockpile. Also, the invention makes it easier to process acidic wastewater from a stockpile or tailings dumpsite. In order to accomplish this, oxidation of sulfide minerals in sulfide ore is suppressed by adding an antioxidant, which contains plant polyphenol and whose main component is an organic acid that contains a carboxyl group, to the sulfide ore stored in a stockpile or tailings dumpsite.