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:
Mar. 10, 2015
Filed:
Dec. 16, 2011
Applicants:
Jaakko Leppinen, Espoo, FI;
Teppo Riihimäki, Linnavuori, FI;
Mikko Ruonala, Kantvik, FI;
Inventors:
Assignee:
Outotec Oyj, Espoo, FI;
Primary Examiner:
Int. Cl.
CPC ...
C22B 23/00 (2006.01); C22B 3/00 (2006.01);
U.S. Cl.
CPC ...
C22B 23/043 (2013.01); C22B 23/0415 (2013.01); C22B 23/0461 (2013.01);
Abstract
The invention relates to a method for separating nickel and other valuable metals particularly from material having low nickel content, which contains iron and magnesium in addition to nickel and other valuable metals. The material having low nickel content is subjected to pulping and atmospheric leaching in acidic and oxidizing conditions, in which the majority of the metals in the material dissolve and the iron is partially precipitated. The precipitated iron is separated from the solution, after which nickel and the other dissolved valuable metals are precipitated as sulphides.