Gold recovery from a refractory pyrrhotite ore by biooxidation (Articolo in rivista)

Type
Label
  • Gold recovery from a refractory pyrrhotite ore by biooxidation (Articolo in rivista) (literal)
Anno
  • 2000-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/S0301-7516(00)00019-3 (literal)
Alternative label
  • S. Ubaldini, F. Veglio`, F. Beolchini, L. Toro, C. Abbruzzese (2000)
    Gold recovery from a refractory pyrrhotite ore by biooxidation
    in International journal of mineral processing (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • S. Ubaldini, F. Veglio`, F. Beolchini, L. Toro, C. Abbruzzese (literal)
Pagina inizio
  • 247 (literal)
Pagina fine
  • 262 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 60 (literal)
Rivista
Note
  • Google Scholar (literal)
  • Scopus (literal)
  • ISI Web of Science (WOS) (literal)
  • Elsevier (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • S. Ubaldini and C. Abbruzzese, CNR, Institute of Mineral Processing, Via Bologna 7, 00138 Rome, Italy. F. Veglio`and F. Beolchini, Department of Chemistry, Chemical Engineering and Materials, UniÍersity of L'Aquila, 67040 Monteluco di Roio, L'Aquila, Italy L. Toro, Department of Chemistry, UniÍersity of La Sapienza, 00185 Rome, Italy (literal)
Titolo
  • Gold recovery from a refractory pyrrhotite ore by biooxidation (literal)
Abstract
  • The aim of the present investigation was to study the biooxidation of a refractory gold-bearing pyrrhotite, in order to increase the gold recovery during the subsequent conventional cyanidation. Bacterial cultures utilised in the biological test consisted predominantly of Thiobacillus genus. Tests were conducted at laboratory scale. The gold content of the ore sample, coming from Bolivia, was of 10 g t-1 Au. After 24 h leaching time by direct cyanidation, low gold recovery was obtained (<20% Au), with a high reagent consumption. On the other hand, a high gold recovery was achieved for the biooxidated samples: After 24 h cyanidation gold dissolution reached about 91% Au. Experimental results have shown the technical feasibility of the biooxidative pretreatment prior to conventional leaching and a complete circuit of treatment, on laboratory scale, has been developed considering also the subsequent gold recovery by carbon adsorption/desorption and electrowinning. A gold extraction yield of about 86% was determined in the whole process for gold extraction from pyrrhotite (biooxidation, solid-liquid separation, cyanidation, adsorption, desorption, electrowinning). (literal)
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