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Copper(II) extraction from ammonia leach solution

Ochromowicz K., Jeziorek M., Wejman K.

Physicochemical Problems of Mineral Processing

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2014

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Vol. 50, iss. 1

327--335

EN

Hydrometallurgical processing of copper-bearing materials (ores, concentrates, by-products) is usually done with the use of acidic or ammonia leaching. In the case where a leaching feed material contains significant amounts of carbonate rocks and iron minerals the second method is preferential due to a higher process selectivity. However, it can also be problematic considering possible ammonia transfer during the subsequent extraction process. The paper presents results of extraction of copper(II) from ammonia leach solutions. The effect of a type of extractant, its concentration and type of diluent in organic phase on extraction efficiency and ammonia transfer was studied. A few commercial extractants were examined, namely LIX 84-I, LIX 984N, LIX 54-100. The results clearly indicate that in the case of extraction systems using hydroxyoximes the extraction efficiency is remarkably higher than for βdiketone reagent. Presented studies proved that extraction efficiency of Cu(II) is also dependent on the type of diluent and is less favourable for systems with non-aliphatic diluents. It was observed that ammonia co-extraction occurs and depends on examined parameters. Scrubbing of loaded organic phase showed that ammonia can be removed almost completely using double wash with sulfuric acid solution.

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Solvent extraction of copper(ii) from concentrated leach liquors

Ochromowicz K., Chmielewski T.

Physicochemical Problems of Mineral Processing

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2013

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Vol. 49, iss. 1

357--367

EN

Hydrometallurgical treatment of complex copper sulfidic ores, by-products and concentrates requires aggressive, oxidative leaching methods and application of Fe(III) ions and oxygen or bacteria assisted environment. Leach liquors generated in the process are usually copper and iron-rich solutions of high acidity. Such conditions require the application of suitably strong and selective reagent to extract copper in SX operations. This paper discusses the copper extraction behavior of commercial copper rea-gents: LIX 984N, LIX 612N-LV and Acorga M5640. Aqueous feed solutions used in SX studies were PLS’ generated in atmospheric leaching of commercial flotation concentrate, produced at Lubin Concen-trator (KGHM). McCabe-Thiele diagrams were generated and copper net transfer values were compared and discussed. It was shown that stronger modified aldoxime reagents (Acorga, LIX 612) are superior over non-modified salicylaldoxime/ketoxime mixture (LIX 984N). Particularly, the ester modified Acor-ga M5640 showed advantages in recovery and copper net transfer values.

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Ekstrakcja miedzi(II) z roztworów amoniakalnych

Piętek G., Gotfryd L., Szołomicki Z., Becker K., Piwowońska J., Kwarciński M.

Rudy i Metale Nieżelazne

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2011

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R. 56, nr 10

511-516

PL

W artykule zaprezentowano wyniki prób hydrometalurgicznego odzysku miedzi z roztworów amoniakalnych pochodzących i ługowania półproduktów hutnictwa miedzi (żużla konwertorowego). Przebadano kilka, oferowanych przez dostawców, komercyjnych ekstrahentów miedzi(ll): (LIX 860 N-IC, LIX 84 l, LIX 54-100, LIX 984). Zbadano i porównano podstawowe właściwości ekstrakcyjne wszystkich tych ekstrahentów przygotowanych w postaci 40 % obj. roztworów węglowodorowych (EXXSOL D80). Na tej podstawie wybrano najlepszy z nich do dalszych prób ekstrakcji miedzi(ll) z roztworów amoniakalnych (40 % obj. roztwór LIX'u 84 l). Z jego użyciem przeprowadzono szczegółowe badania ekstrakcji i reekstrakcji miedzi(ll) z przygotowanych roztworów technologicznych. Na podstawie wykonanych badań wyznaczono parametry pracy układu ekstrakcyjnego, pracującego w sposób ciągły w układzie przeciwprądowym. Przeprowadzono najpierw symulację próby ciągłej, a następnie, opierając się na jej wynikach, pełną próbę ciągłą przeciwprądową w skali laboratoryjnej. Otrzymano bardzo dobry reekstrakt o zawartości miedzi na poziomie 60 g/dm3.

EN

The article presents the results of the tests hydrometallurgical recovery of copper from solutions of ammonia coming from the leaching of copper metallurgy intermediates. There has been examined several offered by suppliers of commercial extractants of copper(ll): (LIX 860 N-IC, LIX 84 I, LIX 54-100, LIX 984). Were tested and compared the basic properties of these extractants extracting all prepared in the form of 40 % vol. hydrocarbon solutions (Exxsol D80). On this basis, the best one to further test the extraction of copper(ll) with ammonia solution (40 % vol. solution of LIX 84-1). With its use, in-depth research of stripping extraction of copper(ll) solutions prepared in technology. On the basis of extraction and stripping were determined parameters of the extraction system running continuously in countercurrent layout. Simulation tests were carried out first and then continued on the basis of its results, the full test of continuous, counter-current extraction on a laboratory scale. Received a very good stripped phase of copper containing of 60 g/dm.