Galvanic interactions of sulfide minerals in leaching of flotation concentrate from Lubin concentrator

• Autorzy: Chmielewski T. , Kaleta R.

Warianty tytułu

PL

Oddziaływania galwaniczne minerałów siarczkowych podczas ługowania koncentratu flotacyjnego z ZWR Lubin

• Języki publikacji: EN

Abstrakty

EN

Measurements of the rest potential of copper sulfide electrodes and pyrite, present in copper ores and concentrates from Lubin Concentrator, have been carried out. Moreover, measurements of sulfide-sulfide contact potential and galvanic current were also performed using deoxygenated sulphuric acid solutions as well as the solutions saturated with oxygen and containing Fe(III) ions. Significant galvanic interactions were observed for sulfide couples exhibiting high potential difference, particularly when copper sulfides were short-circuited with pyrite. According to mineralogical data for Lubin polymineral copper concentrate, chalcocite and bornite are dominating with chalcopyrite and covellite as minor copper minerals. Expected is advantageous affect of pyrite in promoting the kinetics of copper leaching from Lubin concentrate as a result of observed galvanic interactions between pyrite and copper sulfides.

PL

Przedstawiono wyniki pomiarów potencjału spoczynkowego elektrod wykonanych z siarczków miedzi i pirytu, obecnych w rudach i koncentratach ZWR Lubin. Ponadto, wykonano pomiary potencjałów zwarcia układów siarczek-siarczek oraz prądów zwarcia wybranych par siarczków w odtlenionych roztworach kwasu siarkowego oraz w roztworach natlenionych i zawierających jony Fe(III). Obserwowano wyraźne oddziaływania między siarczkami różniącymi się znacznie wartością potencjału spoczynkowego, zwłaszcza, gdy siarczki miedzi były w kontakcie z pirytem. Zgodnie z danymi mineralogicznymi dla koncentratu Lubin chalkozyn i bornit są dominującymi siarczkami miedzi, natomiast zawartość chalkopirytu i covellinu jest wyraźnie niższa. Można stąd oczekiwać korzystnego dla ługowania wpływu oddziaływania pirytu na ługowanie przejawiający się wzrostem szybkości ługowania miedzi w wyniku oddziaływań galwanicznych w układach piryt - siarczki miedzi.

Słowa kluczowe

EN

copper concentrate; sulfide electrode; galvanic interactions

PL

koncentrat miedzi; elektrody siarczkowe; oddziaływania galwaniczne

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2011
• Tom: Vol. 46
• Strony: 21--34
• Opis fizyczny: Bibliogr. 31 poz.

Twórcy

autor

Chmielewski T.

autor

Kaleta R.

• Wroclaw University of Technology, Faculty of Chemistry, Wybrzeze Wyspiańskiego 27, 50-340 Wroclaw, Poland,

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