Harnessing Microwave Technology for Enhanced Recovery of Zinc from Industrial Clinker
Kenzhaliyev B. Surkova T. Berkinbayeva A. Baltabekova Z. Smailov K.
June 2024Multidisciplinary Digital Publishing Institute (MDPI)
Metals
2024#14Issue 6
This article presents a cutting-edge approach to microwave-assisted processing aimed at enhancing the efficiency of zinc extraction from materials characterized by a high degree of processing complexity. The described technique encompasses two sequential phases: phase transformation under microwave irradiation and leaching in sulfuric acid at ambient temperature. During the phase transformation, implemented through the application of microwave energy, insoluble zinc phases undergo a controlled transition. The experimental results confirm that microwave calcination at 600 °C for 5–7 min is effective for converting ZnS to ZnO without the formation of ZnO∙Fe2O3. Zinc extraction from the clinker reached 46.47% after treatment with microwave radiation at a power of 25 kW for the specified duration. Thus, this study opens up prospects for environmentally friendly zinc extraction from challenging-to-process resources.
clinker , leaching , microwave roasting , phase transformation , zinc
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The Institute of Metallurgy and Ore Beneficiation, Satbayev University, Almaty, 050013, Kazakhstan
The Institute of Metallurgy and Ore Beneficiation
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