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:
Jun. 16, 2015
Filed:
Feb. 21, 2011
Teppo Riihimäki, Linnavuori, FI;
Jaakko Leppinen, Espoo, FI;
Mikko Ruonala, Kantvik, FI;
Liisa Haavanlammi, Espoo, FI;
Teppo Riihimäki, Linnavuori, FI;
Jaakko Leppinen, Espoo, FI;
Mikko Ruonala, Kantvik, FI;
Liisa Haavanlammi, Espoo, FI;
OUTOTEC OYJ, Espoo, FI;
Abstract
The invention relates to the hydrometallurgical treatment of laterite ores in order to recover valuable metals. More specifically, the invention presented relates to a method for improving precipitation and solid-liquid separation in conjunction with the leaching of laterite ores. According to the method the slurry exiting the leaching of laterite ores is neutralized, after which part of the slurry is routed to solid-liquid separation. Iron is precipitated from the solid-liquid separation overflow by neutralizing the solution and the solution that is formed, which includes jarosite seeds, is routed to an appropriate point in the process to control the precipitation of iron and to enhance the filterability of the solids.