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1. (WO1979000906) RECOVERY OF ELEMENTAL SULFUR AND METAL VALUES FROM TAILINGS FROM COPPER RECOVERY PROCESSES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1979/000906 International Application No.: PCT/US1978/000225
Publication Date: 15.11.1979 International Filing Date: 18.12.1978
IPC:
C01B 17/06 (2006.01) ,C22B 11/08 (2006.01) ,C22B 15/00 (2006.01) ,C22B 34/34 (2006.01)
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
17
Sulfur; Compounds thereof
02
Preparation of sulfur; Purification
06
from non-gaseous sulfides or materials containing such sulfides, e.g. ores
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
11
Obtaining noble metals
08
by cyaniding
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
15
Obtaining copper
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
34
Obtaining refractory metals
30
Obtaining chromium, molybdenum or tungsten
34
Obtaining molybdenum
Applicants:
Inventors:
Priority Data:
89451510.04.1978US
Title (EN) RECOVERY OF ELEMENTAL SULFUR AND METAL VALUES FROM TAILINGS FROM COPPER RECOVERY PROCESSES
(FR) RECUPERATION DE SOUFRE ELEMENTAIRE ET DE PRODUITS METALLIQUES A PARTIR DES QUEUES PROVENANT DE PROCEDES DE RECUPERATION DU CUIVRE
Abstract:
(EN) Process for recovery of copper, molybdenum, gold and elemental sulfur in tailings from hydrometallurgical processing of copper sulfide ores, particularly chalcopyrite. The tailings are usually discarded, and thus the recovery of valuable elements therefrom makes the environmentally desirable hydrometallurgical processes of Fig. 1 economically feasible. The tailings are concentrated to a small bulk volume by froth flotation to reject barren gangue and the process (Fig. 2) proceeds by removing sulfur from the solid concentrate residue, preferably by volatilization or leaching with a sulfur solvent, and recovering the elemental sulfur; leaching the residue with ferric chloride to selectively dissolve copper and iron: recovering copper from the liquid, or sending it back to the hydrometallurgical circuit; leaching the residue from the ferric chloride leach with cyanide to selectively solubilize gold, and recovering gold from the liquid, recovering molybdenum ore from the residue from the cyanide leach by froth flotation, and recovering molybdenum from the molybdenum ore.
(FR) Procede de recuperation du cuivre, de molybdene, d"or et de soufre elementaire dans les queues provenant du traitement hydrometallurgique des minerais de sulfure de cuivre, en particulier la copyrite. Les queues sont habituellement jetees, et donc la recuperation d"elements precieux s"y trouvant rend les procedes hydrometallurgiques de la fig. 1, non polluants pour l"environnement, economiquement viables. Les queues sont concentrees en petites quantites en vrac par flottation pour rejeter la gangue et le procede (Fig. 2) se poursuit par l"extraction du soufre a partir du residu concentre solide, de preference par volatilisation ou lixiviation avec un solvant du soufre, et par la recuperation du soufre elementaire; lixiviation du residu avec du chlorure ferrique pour dissoudre selectivement le cuivre et le fer: recuperation du cuivre a partir du liquide, ou renvoi de celui-ci dans le circuit hydrometallurgique; lixiviation du residu a partir du produit de lixiviation au chlorure ferrique avec du cyanure pour solubiliser selectivement l"or, recuperation de l"or du liquide, recuperation du minerai de molybdene du residu provenant du produit de lixiviation au cyanure par flottation, et recuperation du molybdene a partir du minerai de molybdene.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)