Polymetallic Ore Concentration Middlings Nitric Acid Leaching Kinetics

Abstract:

The purpose of this work is the kinetic evaluation of reactions occurring during nitric acid leaching of pollymetallic sulfide middlings, for the most complete translation of copper, zinc and sulfur in solution and concentration of precious metals in residue. Methodology is pollymetallic sulfide middlings nitric acid leaching kinetics were studied using mathematical methods such as the experimental data numerical differentiation. Relevance/value is the main sulfide minerals kinetic characteristics were obtained for the studied materials, including the rate of the process, order of reaction, the rate constant for the forward and reverse reaction. Findings are the rate of the process is limited by kinetics. The calculated values of kinetic parameters showed that the process kinetics are influenced by such factors as the nature of leachable sulfide, nitric acid concentration, the surface area of the solid sulfide, the system approaches equilibrium at saturation of the liquid phase reaction products.

• Periodical: Solid State Phenomena (Volume 265)
• Pages: 1065-1070
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.265.1065
• Online since: September 2017
• Authors: D.A. Rogozhnikov*, B.V. Kolmachikhin
• Keywords: Kinetics Process, Mathematical Methods, Nitric Acid Leaching

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