Dissolution of MoS2 concentrate using NaClO from 283 to 373 K

A. Aracena, R. Rubilar, O. Jerez, D. Carvajal

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This study analyses the leaching process of molybdenite (MoS2) concentrate using sodium hypochlorite (NaClO) at temperatures ranging from 283 to 373 K. The following variables were studied: leaching time, stirring velocity, temperature, NaClO concentration, NaOH concentration, particle size and liquid:solid ratio. The optimum parameters for molybdenite dissolution were: Time=0.81 h, stirring speed=800 rev min-1, temperature=303 K, NaClO concentration=1.49M, NaOH concentration=8.01M, particle size=45 μm and liquid:solid ratio=300 : 1. Under these conditions, molybdenite dissolution reached around 99%, while Cu and Fe recovery were insignificant. Analysis using XRD, QUESCAM and SEM showed release indices and subsequent reaction of the MoS2 and the constituent parts of Cu and Fe.

Original languageEnglish
Pages (from-to)455-459
Number of pages5
JournalCanadian Metallurgical Quarterly
Issue number4
StatePublished - 2015
Externally publishedYes


  • Molybdenite concentrate
  • Sodium hydroxide
  • Sodium hypochlorite
  • Temperature


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