Abstract— Kinetic studies were conducted on the process of the dissolution of non-ferrous metals with the use of sulfur-containing material as a source of leaching agent – sodium thiosulfate. It is shown that with increasing concentrations of sodium hydroxide in solution in the range of 0.1 – 1.0 M, copper recovery is increased from 21.5 to 46.2 %.
As the temperature increases from 25 to 45 0C, copper dissolution rate in the initial moment of the time increases, then over time this figure gradually decreases with decreasing the copper content in the initial product. The value of the reaction order is 0.39. The calculated value of the activation energy in the process of leaching copper is 12.01 kJ / mol, which suggests that the analyzed process is proceeds in the diffusion mode.
Keywords— complex and low-grade raw materials, the structure of condensed systems, structural-phase transitions, hydrometallurgy.
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