Leaching of enargite in H2SO4–NaCl–O2 media
作者： R. Padilla , D. Girón , M.C. Ruiz
DOI: 10.1016/J.HYDROMET.2005.08.006
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摘要: Abstract This paper discusses the leaching of enargite (Cu3AsS4) in sulfuric acid–sodium chloride solution using oxygen as oxidant at atmospheric pressure. The dissolution arsenic from this medium proceeds with elemental sulfur a reaction product according to: 2Cu3AsS4 + 6H2SO4 + 5.5O2 → 6CuSO4 + 2H3AsO4 + 8S° + 3H2O rate was found to be very slow. About 6% dissolved 7 h 100 °C containing 0.25 M H2SO4 and 1.5 NaCl under flow 0.3 l/min. kinetics is well represented by shrinking core model for spherical particles controlled surface reaction. An apparent energy activation 65 kJ/mol obtained temperature range 80 °C.
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