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An Assessment of Parameters for Cementation of Impurities from Zinc Sulphate Leach Solution by a Statistical Design

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Abstract

In this article, the cementation of major impurities from zinc sulphate leach solution by the addition of zinc dust was studied by considering different parameters including time, mesh size, and percentage of excess zinc dust. The output obtained from various experiments was utilized for the design of experiments. A multi-level categorical factorial design with a quadratic model was employed during this study. Results were predicted to minimize the concentration of impurity metals in the solution by altering the parameters. Furthermore, these predicted results were validated by performing another experiment. Successfully, it showed that the predicted and experimental data values were close to each other. The predicted optimized values were 40 min, 100% excess zinc dust, and 300 mesh size for copper; 42 min, 100% excess zinc dust, and 300 mesh size for cobalt; 37 min, 100% excess zinc dust, and 300 mesh size for cadmium; and 34 min, 100% excess zinc dust, and 300 mesh size zinc dust for nickel. At these optimized values, the experimental results showed 99.99%, 55.7%, 99.6%, and 76.6% cementation efficiencies for copper, cobalt, cadmium, and nickel respectively. The statistical design of experiments for the effective cementation of impurities corroborates the economic feasibility of optimizing parameters for the proposed process.

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Acknowledgements

Authors express thanks to Head, Department of Metallurgical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, India, for providing the needful workplace and analytical support to pursue this research work. They also express their gratitude to Dr. Arunabh Mesharam, Ms. Pushpa Gautam, Mr. Seby Varghese, Mr. Kumar Saurabh, and Mr. Chinmay Rajendra Dhake, Indian Institute of Technology (BHU), for their constant support.

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Correspondence to Arvind Rajnarayan Singh.

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Singh, A.R., Joseph, A.S., Rao, M.D. et al. An Assessment of Parameters for Cementation of Impurities from Zinc Sulphate Leach Solution by a Statistical Design. Mining, Metallurgy & Exploration 39, 2257–2271 (2022). https://doi.org/10.1007/s42461-022-00656-3

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