C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 23/00 (2006.01) C22B 3/06 (2006.01) C22B 3/44 (2006.01)
Patent
CA 2571492
A process for leaching laterite ores containing limonite and saprolite in a two stage process. The first stage consisting of mixing and reacting the ore with concentrated mineral acid, and the second stage consisting of preparing a slurry of the acid/ore mixture in water and leaching the mixture to dissolve nickel and cobalt. Iron is efficiently separated from nickel and cobalt in the solid leach residue primarily as an oxide or hydroxide of ferric iron other than jarosite.
L'invention concerne un procédé de lixiviation de minerais de latérite contenant de la limonite et de la saprolite dans un processus à deux étapes. La première étape consiste à mélanger et à mettre en réaction le minerai avec de l'acide minéral concentré; et la seconde étape consiste à préparer une boue du mélange acide-minerai dans de l'eau et à lixivier le mélange afin de dissoudre le nickel et le cobalt. Le fer est séparé efficacement du nickel et du cobalt dans le résidu de lixiviation solide, principalement en tant qu'oxyde ou hydroxyde de fer ferrique autre que la jarosite.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Skye Resources Inc.
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