Abstract
In the digestion process of diasporic bauxite, due to precipitation of silicon and titanium compounds, a hard, dense mineral fouling are formed at the digestion device wall, causing heat transfer coefficient decrease. The phases of mineral fouling were analyzed by X-diffraction analysis, infrared spectroscopy, scanning electron microscopy and thermal analysis. In view of mineral characteristics of Chinese high silica and hard to digest diasporic bauxite, the mineral composition and microstructure of the silicon titanium mineral fouling have been analyzed. The mineral fouling prevention and removal methods have been studied. Using bauxite slurry pre-desilication and pre-detitanation we can effectively reduce and prevent the mineral fouling formation; and application of acid leaching can soften the hard and dense silicon titanium mineral fouling, and by high pressure water washing, the mineral fouling can be easily washed away.
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Wenzhong, C., Dongdong, W., Weiwei, T., Hong, Z. (2015). Research of the Mineral Fouling Composition and Removal Method in Bauxite Digestion Process. In: Hyland, M. (eds) Light Metals 2015. Springer, Cham. https://doi.org/10.1007/978-3-319-48248-4_10
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DOI: https://doi.org/10.1007/978-3-319-48248-4_10
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48610-9
Online ISBN: 978-3-319-48248-4
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