Kinetics of Molybdenum Disulfide Oxidation in Sodium Hypochlorite Solutions

. The sulfide phase of ore minerals is passivated in the oxidizing conditions of hydrometallurgy. Overcoming passivation is an important stage and condition for their efficient processing. The aim of the work was to describe the kinetics of its oxidative leaching using the example of a Mo concentrate in a hypochlorite electrolyte. Samples of Mo concentrate (38% Mo in the MoS2 phase) were used. The concentration of Cu (II), Fe (III), Mo (VI), Re (VII) ions was determined photocolorimetrically and spectrometrically (AAS Perkin-Elmer 3030B, ICP-Agilent 7500 ICP MS); kinetic measurements were performed with compact discs made of molybdenum disulfide. The kinetics of the reagent oxidation of a sulfide mineral in a hypochlorite electrolyte, in the temperature range of 22-45 ° C, at atmospheric pressure, has been studied by the rotating disk method. The parameters of the kinetic equation of the leaching process were obtained: the order of the reaction in terms of the oxidant concentration and the activation energy of the process of solid-phase diffusion of molybdenum (VI) ions from the crystal lattice of the mineral in the composition of the molybdenite concentrate into the liquid phase of the solution.

Ҳали таржима қилинмаган