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1. (WO2011161597) UPGRADING OF PRECIOUS METALS CONCENTRATES AND RESIDUES

Pub. No.:    WO/2011/161597    International Application No.:    PCT/IB2011/052644
Publication Date: Dec 29, 2011 International Filing Date: Jun 17, 2011
IPC: C22B 1/00
C22B 1/04
C22B 1/08
C22B 11/00
C22B 11/06
Applicants: ANGLO PLATINUM MANAGEMENT SERVICES (PROPRIETARY) LIMITED
ROY, Alain
DAVIS, Boyd R
BRYSON, Leslie James
NELSON, Lloyd Robert
WOOLLAM, Stephen Farring
MTOTYWA, Victor Loyiso Vusumzi
Inventors: ROY, Alain
DAVIS, Boyd R
BRYSON, Leslie James
NELSON, Lloyd Robert
WOOLLAM, Stephen Farring
MTOTYWA, Victor Loyiso Vusumzi
Title: UPGRADING OF PRECIOUS METALS CONCENTRATES AND RESIDUES
Abstract:
A process for upgrading a precious metals-containing concentrate or residue results in near-quantitave removal of base metals and several impurity elements at elevated temperatures. The precious metals- containing concentrate or residue is exposed to oxygen or an oxygen- containing evironment in an oxidative pre-treatment step followed by treatment with a hydrochlorinating agent in a hydrochlorination step to form an upgraded concentrate or residue.