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:
Sep. 27, 2022
Filed:
Oct. 03, 2018
Applicant:
Vale S.a., Rio de Janeiro, BR;
Inventors:
Neymayer Pereira Lima, Belo Horizonte, BR;
Klaydison Carlaile Silva, Belo Horizonte, BR;
Maurício Curi Segato, Ouro Preto, BR;
Assignee:
VALE S.A., Rio de Janeiro, BR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B03D 1/01 (2006.01); B03C 1/00 (2006.01); B03C 1/30 (2006.01); B03D 1/008 (2006.01);
U.S. Cl.
CPC ...
B03D 1/01 (2013.01); B03C 1/002 (2013.01); B03C 1/30 (2013.01); B03D 1/008 (2013.01); B03C 2201/18 (2013.01); B03C 2201/20 (2013.01); B03D 2201/02 (2013.01);
Abstract
The present application relates to a concentration process of iron minerals from ultrafine tailings (slimes) from iron ore processing through reverse flotation with pH between 8.5 and 10.5 with the addition of amide-amine type collector, or further a mixture thereof with traditional cationic collectors (amines), in the absence of any depressant, alternatively including a step of high field magnetic concentration, which allows to obtain a concentrate with iron content higher than 66% and contents of SiO2+Al2O3 below 4%.