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• W1994478210 abstract "The ammonium persulphate (APS) leaching of chalcopyrite concentrate in the presence of ammonium carbonate was studied. The effects of ammonium carbonate concentration, APS concentration, leaching time, leaching temperature, solid/liquid ratio and stirring speed were investigated. Optimum leaching conditions were found as follows: APS concentration is 200 g L−1; ammonium carbonate concentration is 200 g L−1; leaching time is 180 min; leaching temperature is 60°C; solid/liquid ratio is 0·04 g mL−1; and stirring speed is 400 rev min−1. Under these conditions, copper extraction yield was obtained at about 72%. Furthermore, iron extraction yield decreased with increasing ammonium carbonate concentration and iron did not pass into solution under this condition. X-ray and SEM analysis also supported these results. It was determined that the copper extraction results were satisfactory by way of all experiments were performed under atmospheric conditions (i.e. low temperature and atmospheric pressure) and achieved selective copper leaching from chalcopyrite concentrate.On a étudié la lixiviation au persulfate d’ammonium (APS) du concentré de chalcopyrite en présence de carbonate d’ammonium. On a examiné l’effet de la concentration du carbonate d’ammonium, de la concentration d’APS, de la durée et de la température de lixiviation, du rapport solide-liquide et de la vitesse d’agitation. Les conditions optimales de lixiviation suivent: concentration d’APS = 200 g L−1; concentration de carbonate d’ammonium = 200 g L−1; durée de lixiviation = 180 min; température de lixiviation = 60°C; rapport solide-liquide = 0·04 g mL−1; et vitesse d’agitation = 400 rpm. Avec ces conditions, le rendement d’extraction du cuivre était d’environ 72%. De plus, le rendement d’extraction du fer diminuait avec l’augmentation de la concentration de carbonate d’ammonium, qui empêchait également le fer de passer en solution. L’analyse aux rayons x et au SEM supportait également ces résultats. Grâce à toutes les expériences effectuées en conditions atmosphériques (c’est-à-dire à basse température et à pression atmosphérique), on a déterminé que les résultats d’extraction du cuivre étaient satisfaisants et qu’on obtenait une lixiviation sélective du cuivre à partir du concentré de chalcopyrite." @default.
• W1994478210 created "2016-06-24" @default.
• W1994478210 creator A5046082901 @default.
• W1994478210 date "2014-06-12" @default.
• W1994478210 modified "2023-09-25" @default.
• W1994478210 title "Direct selective leaching of chalcopyrite concentrate" @default.
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• W1994478210 doi "https://doi.org/10.1179/1879139514y.0000000141" @default.
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