Abstract
Iron precipitation occupies a vital position in the metallurgy industry, especially for treating iron-bearing sphalerite in hydrometallurgical processes. This paper emphasizes techniques for removing iron from high-iron sphalerite via hematite precipitation, and describes the results of research performed to examine ferrous oxydrolysis and precipitation. The behavior and mechanism of conversion between the iron phase and hematite residue at elevated temperature under pressure is ascertained by investigating the dissolving characteristic and thermodynamics stable area of hematite at sulfate system. The results show hematite precipitation went through the process of crystallization, dissolve, oxidation and precipitation of ferrous sulfate, and the overall iron precipitation was determined to be controlled by the rate of ferric sulphate hydrolysis rather than the oxidation of ferrous sulphate or the re-dissolution of ferrous sulphate crystals, or the transformation of basic ferric sulphate.
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Acknowledgements
For financial support of this research, the authors acknowledge the National Natural Science Foundation of China (No. 51664030, 51474117, 51564030 and 51474115), Yunnan Province Applied Foundation Research Programs of China (No. 2014FB126), and the National Class Analysis and Testing Centers of Kunming University of Science and Technology.
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© 2018 The Minerals, Metals & Materials Society
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Deng, Z., Wei, C., Li, X., Li, C., Fan, G., Li, M. (2018). Hematite Precipitation from High Iron Solution in Hydrometallurgy Process. 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_53
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DOI: https://doi.org/10.1007/978-3-319-72138-5_53
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