Abstract
A new microwave roasting technology for the removal of Cl from zinc oxide dust is proposed in this paper. The effect of important parameters, such as roasting temperature, holding time and stirring speed, were investigated and the process conditions were optimized using response surface methodology (RSM). The experimental results show that zinc oxide dust dechlorination rate can reach more than 95.66% and meet the requirements of wet smelting electrolysis when controlling the stirring speed of 60 r/min,roasting temperature of 650 ℃, holding time of 30 min. In addition, the effect of roasting temperature and holding time on removal efficiency of Cl was most significant. As a result, the Cl content was decreased without the risk of pollution. This makes it as a good choice for a more ecological treatment of zinc secondary resources.
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Acknowledgements
The authors are grateful for the financial support from the National Natural Science Foundation (No.51104073)
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© 2018 The Minerals, Metals & Materials Society
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Ma, A., Xie, T., Li, G., Zheng, X., Zhang, L., Peng, J. (2018). Dechlorination of Zinc Oxide Dust by Microwave Roasting with RSM Optimization. In: Hwang, JY., et al. 9th International Symposium on High-Temperature Metallurgical Processing. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72138-5_68
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DOI: https://doi.org/10.1007/978-3-319-72138-5_68
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