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. 12, 2016
Filed:
Apr. 12, 2013
Applicant:
Vale S.a., Rio de Janeiro, BR;
Assignee:
VALE S.A., Rio de Janeiro, BR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B03D 1/02 (2006.01); B03D 1/06 (2006.01); B03D 1/016 (2006.01); B03D 1/018 (2006.01); B03D 1/01 (2006.01); B03D 1/012 (2006.01); B03D 1/014 (2006.01);
U.S. Cl.
CPC ...
B03D 1/01 (2013.01); B03D 1/012 (2013.01); B03D 1/014 (2013.01); B03D 1/016 (2013.01); B03D 1/018 (2013.01); B03D 1/06 (2013.01); B03D 2201/02 (2013.01); B03D 2201/06 (2013.01); B03D 2203/02 (2013.01);
Abstract
A method of using the synergy of multiple depressants to improve the depression of iron sulphide without compromising the recovery of the valuable sulphide minerals in the flotation of non-ferrous metal sulphides, while reducing or eliminating the use of environmentally problematic chemicals such as polyamines. The method has significant economic and environmental benefits. The multiple depressants comprise at least one organic polymer, at least one sulphur-containing compound and/or at least one nitrogen-containing organic compound.