Title:
PRODUCTION OF ZINC OXIDE FROM COMPLEX SULFIDE CONCENTRATES USING CHLORIDE PROCESSING
Document Type and Number:
WIPO Patent Application WO2002068701
Kind Code:
A3
Abstract:
An apparatus and a process for producing zinc oxide from a zinc-bearing material are provided. The process comprises the steps of leaching the complex sulfide material with hydrochloric acid, ferric chloride, and oxygen; precipitating iron from the leach solution using lime and oxygen; removing copper, silver, cadmium, cobalt and lead from the leach solution by cementation with zinc dust; precipitating zinc oxide from the leach solution using lime; and regenerating HCI from a calcium chloride leach filtrate solution to regenerate hydrochloric acid and precipitate gypsum. Related processes for recovering copper, silver, lead, and iron from complex sulfide materials and for recovering lead from residue by solubilizing lead chloride and precipitating it with lime are also provided.
Inventors:
ALLEN CAROLE
PAYANT SERGE
KONDOS PETER
VAN WEERT GEZINUS
PAYANT SERGE
KONDOS PETER
VAN WEERT GEZINUS
Application Number:
PCT/CA2002/000260
Publication Date:
October 31, 2002
Filing Date:
February 27, 2002
Export Citation:
Assignee:
NORANDA INC (CA)
International Classes:
B01J8/00; C01G9/02; C22B3/10; C22B19/34; (IPC1-7): C22B19/34; C22B3/00; C22B3/02; C22B13/00
Domestic Patent References:
| WO2001025497A1 | 2001-04-12 |
Foreign References:
| US4346062A | 1982-08-24 | |||
| GB518413A | 1940-02-27 | |||
| EP1059361A1 | 2000-12-13 | |||
| FR2373611A2 | 1978-07-07 | |||
| FR2351178A1 | 1977-12-09 | |||
| US4372782A | 1983-02-08 |
Other References:
DUTRIZAC J E: "SULPHATE CONTROL IN CHLORIDE LEACHING PROCESSES", HYDROMETALLURGY, ELSEVIER SCIENTIFIC PUBLISHING CY. AMSTERDAM, NL, vol. 23, no. 1, 1 October 1989 (1989-10-01), pages 1 - 22, XP000084129, ISSN: 0304-386X
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