Canadian Patents Database

Patent Summary

(12) Patent Application:	(11) CA 2334511
(54) English Title:	TREATMENT OF ROASTED METAL SULPHIDE ORES AND FERRITES BY LEACHING WITH PEROXYSULPHURIC ACID
(54) French Title:	TRAITEMENT DES PYRITES ET DES FERRITES METALLIQUES GRILLEES PAR LESSIVAGE A L'ACIDE PEROXYSULFURIQUE

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English Abstract

A process for the treatment of a roasted metal sulphide ore, for the
separation of metals therefrom. The process comprises leaching the roasted ore
with peroxysulphuric acid, optionally in the presence of chlorine, and
separating a solution containing metals. The process is particularly useful in
separating copper and zinc from sulphide ores of those metals, in particular
when the ore has been subjected to a dead roast or to a sulphation roast and
the roasted ore contains then metal ferrites which otherwise require high acid
concentrations and high leach temperatures for metal recovery therefrom.

French Abstract

L'invention concerne un procédé de traitement d'une pyrite métallique grillée permettant de séparer les métaux qu'elle contient. Ledit procédé consiste à lessiver le minerai grillé avec de l'acide peroxysulfurique, éventuellement en présence de chlore, et à en séparer une solution métallifère. Le procédé de l'invention est particulièrement utile pour séparer le cuivre et le zinc des pyrites de ces métaux, notamment lorsque le minerai a été soumis à un grillage à mort ou à un grillage sulfateur et lorsque le minerai grillé contient des ferrites métalliques nécessitant, en temps normal, des concentrations d'acide et des températures de lessivage élevées pour l'extraction de ces métaux.

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Patent Details

(51) International Patent Classification (IPC):	C22B 19/20 (2006.01) C22B 1/02 (2006.01) C22B 3/08 (2006.01) C22B 15/00 (2006.01)
(72) Inventors (Country):	RISHEA, MARC MURRAY (Canada) LAKSHMANAN, VAIKUNTAM IYER (Canada) HANNA, MICHAEL MOURAD (Canada)
(73) Owners (Country):	PROTIUM METALS INC. (Canada)
(71) Applicants (Country):	PROTIUM METALS INC. (Canada)
(74) Agent:	SIM & MCBURNEY
(45) Issued:
(86) PCT Filing Date:	1999-06-09
(87) PCT Publication Date:	1999-12-23
(30) Availability of licence:	N/A
(30) Language of filing:	English

Patent Cooperation Treaty (PCT):	Yes
(86) PCT Filing Number:	PCT/CA1999/000536
(87) International Publication Number:	WO1999/066085
(85) National Entry:	2000-12-06

(30) Application Priority Data:
Application No. Country Date 2,240,450 Canada 1998-06-12

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View Patent Image	Download Patent Image in PDF Format	Size of Image (KB)	Number of Pages
Cover Page	Cover Page	42	1
Abstract	Abstract	60	1
Claims	Claims	93	3
Description	Description	608	13
Drawings	Drawings	N/A	N/A
Representative Drawing	Representative Drawing	N/A	N/A