C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/06 (2006.01) B03B 5/00 (2006.01) B03B 7/00 (2006.01) C22B 3/04 (2006.01) C22B 3/08 (2006.01) C22B 3/10 (2006.01) C22B 23/00 (2006.01)
Patent
CA 2532144
A process for the recovery of nickel and cobalt from laterite ores, the process including the steps of: a) beneficiating the ore to separate it into a beneficiated upgraded ore fraction and a coarse, siliceous low grade rejects fraction which is substantially free from fines and clay materials; b) separately processing the upgraded ore fraction for the recovery of nickel and cobalt; and c) subjecting the low grade rejects fraction to a heap leach process with an acid supplemented solution to create a heap leachate for further nickel and cobalt recovery processing.
Procédé de récupération de nickel et de cobalt à partir de minerais de latérite. Le procédé selon l'invention comprend les étapes suivantes: (a) on enrichit le minerai pour le séparer en une fraction minerai amélioré enrichi et en une fraction rebuts siliceux, grossiers de qualité inférieure qui est sensiblement dépourvue de fines et de matières argileuses; (b) on traite séparément la fraction minerai enrichi pour récupérer le nickel et le cobalt; et (c) on soumet la fraction rebuts de qualité inférieure à un processus de lixiviation en tas avec une solution enrichie en acide pour créer un produit de lixiviation utile pour un autre traitement de récupération du nickel et du cobalt.
Liu Houyuan
Miller Geoffrey William
Bhp Billiton Ssm Technology Pty Ltd
Sim & Mcburney
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