Investigation of Phase Transformations in Technogenic Raw Materials Under Microwave Treatment for Enhanced Zinc Leaching
Kenzhaliyev B. Berkinbayeva A. Baltabekova Z. Moldabayeva G. Smailov K. Saulebekkyzy S. Tolegenova N. Karim D. Omirbek T.
April 2025Multidisciplinary Digital Publishing Institute (MDPI)
Processes
2025#13Issue 4
This study presents the results of an investigation into the effectiveness of microwave (MW) treatment (1) as a preconditioning method for technogenic raw materials (2) to enhance zinc (3) leaching (4) efficiency. Selective dielectric heating facilitates phase transformations (5), converting sphalerite (ZnS) into zinc oxide (ZnO), which exhibits significantly improved acid leachability. The response surface methodology (RSM) was utilized to evaluate critical operational variables, encompassing sulfuric acid concentration, leaching period, slurry density, and thermal conditions. The obtained results confirm the potential of MW treatment in hydrometallurgical processes, offering a sustainable and energy-efficient alternative for processing technogenic raw materials.
leaching , microwave treatment , phase transformation , technogenic raw materials , zinc
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The Institute of Metallurgy and Ore Beneficiation, Satbayev University, Almaty, 050013, Kazakhstan
Department of Metallurgy and Mineral Processing, Mining and Metallurgical lnstitute named after O. A. Baykonurov, Satbayev University, Almaty, 050013, Kazakhstan
The Institute of Metallurgy and Ore Beneficiation
Department of Metallurgy and Mineral Processing
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