Abstract
In an attempt to reduce phosphorus content of the Mn–Si alloys produced by high-phosphorus manganese ores, dephosphorization thermodynamic experiments of high-phosphorus Mn–Si alloys were investigated by using Al-based dephosphorization agent and CaO–SiO2–Al2O3 covering slags in silicon molybdenum furnace without protection of gas. This research focused on the transform rule of phosphorus element during the process of its entrance into slag, the effect of CaO/Al2O3 (mass ratio of CaO to Al2O3) on dephosphorization ratio, and the main phases in dephosphorization slags. The results showed that phosphorus element entered into slag from Mn–Si alloys, respectively, conforming to these two routes: [P] → Fe3(PO4)2 → Ca3(PO4)2 → 6 . 2CaO . SiO2–3CaO . P2O5 solid solution and [P] → AlPO4. With increase of CaO/Al2O3, the dephosphorization ratio increased, and the greatest dephosphorization ratio could reach 79%.
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Acknowledgements
The authors greatly acknowledge the financial support provided by The National Natural Science Foundation of China (51774054).
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Sun, C., Zhu, Z., Jiao, W., Zhang, C., Wang, Y., Fan, J. (2022). Experimental Study on Dephosphorization of High-Phosphorus Mn–Si Alloys. In: Peng, Z., et al. 12th International Symposium on High-Temperature Metallurgical Processing. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-92388-4_10
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DOI: https://doi.org/10.1007/978-3-030-92388-4_10
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