Comparison of chemical and biological leaching of sulfide tailings

• Autorzy: Aromaa J. , Makinen J. , Vepsalainen H. , Kaartinen T. , Wahlstrom M. , Forsen O.
• Języki publikacji: EN

Abstrakty

EN

Sulphidic tailings from Finnish Hitura nickel mine and Pyhäsalmi multi-metal mine were leached using sulphuric acid and bioleached. The aim was to recover minor amounts of valuable Cu, Ni, Zn and Mn. Both tailings consisted mainly of iron and magnesium-containing minerals and acid neutralizing minerals. The solution after chemical leaching tests contained mostly iron and magnesium, in Hitura up to 11 g/dm3 Fe and 38 g/dm3 Mg while in Pyhäsalmi 8–9 g/dm3 Fe and 4 g/dm3 Mg. Amount of these metals was 20–100-fold larger than amount of valuable metals, which were typically 100-300 mg/dm3. Problems in chemical leaching were high consumption of acid and poor selectivity. Bioleaching using iron and sulphur oxidizing bacteria was more selective towards the valuable metals. Both in leaching and bioleaching the high concentration of iron and magnesium in solution will make metals recovery challenging.

Słowa kluczowe

EN

sulfide tailings; chemical leaching; bioleaching; selectivity

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2013
• Tom: Vol. 49, iss. 2
• Strony: 607--620
• Opis fizyczny: Bibliogr. 7 poz. rys., tab.

Twórcy

autor

Aromaa J.

• Aalto University, Department of Materials Science. P.O. Box 16200, FI 00076 Aalto, Espoo, Finland

autor

Makinen J.

• VTT, Waste Technology and Recycling. P.O. Box 1000, FI 02044 VTT, Espoo, Finland

autor

Vepsalainen H.

• Aalto University, Department of Materials Science. P.O. Box 16200, FI 00076 Aalto, Espoo, Finland
• Present address OutotecOyj, P.O. Box 86, FI 02200, Espoo, Finland

autor

Kaartinen T.

• VTT, Waste Technology and Recycling. P.O. Box 1000, FI 02044 VTT, Espoo, Finland

autor

Wahlstrom M.

• VTT, Waste Technology and Recycling. P.O. Box 1000, FI 02044 VTT, Espoo, Finland

autor

Forsen O.

• Aalto University, Department of Materials Science. P.O. Box 16200, FI 00076 Aalto, Espoo, Finland

Bibliografia

• 1. ANTONIJEVIĆ M.M., DIMITRIJEVIĆ M.D., STEVANOVIĆ Z.O., SERBULA S.M., BOGDANOVIC G.D., 2008, Investigation of the possibility of copper recovery from the flotation tailings by acid leaching. Journal of Hazardous Materials158, 1, 23–34.
• 2. MONCUR M.C., PTACEK C.J., BLOWES D.W., JAMBORJ L., 2005, Release, transport and attenuation of metals from an old tailings impoundment. Applied Geochemistry 20, 3, 639–659.
• 3. TOROPAINEN V., HEIKKINEN P., 2006, Mineralogical and chemical composition of the tailings and waste rock samples of Pyhäsalmi, Hitura, Talvivaaraand Ihalainen ore deposits. GTK Report S49/0000/2006/3.
• 4. XIE Y., XU Y., YAN L., YANG R., Recovery of nickel, copper and cobalt from low-grade Ni–Cu sulfide tailings. Hydrometallurgy 80(2005) 1–2, 54–58.
• 5. BOSECKER K., 1997, Bioleaching: metal solubilization by microorganisms. FEMS Microbiology reviews 20, 591–604.
• 6. RAWLINGS D.E., 2002, Heavy metal mining using microbes. Annual Review of Microbiology 56, 65-91.
• 7.SAND W., GEHRKE T., JOZSA P-G., SCHIPPERS A., 2001, (Bio)chemistry of bacterial leaching –direct vs. indirect bioleaching. Hydrometallurgy 59, 159–175.