Abstract
In this work, we studied the evaporation of antimony trioxide (Sb2O3) from an antimony slag by bubbling nitrogen gas in the temperature range 1000–1300 °C. Experiments were carried out at gas flow rates of 20–60 l/h for 70 min. The slag evaporation ratio and Sb recovery were evaluated by a gravimetric method. Increasing temperature and gas flow rate resulted in a higher slag evaporation ratio and Sb recovery. The Sb recovery reached around 69% at 1200 °C with a gas flow rate of 40 l/h. The generated Sb2O3 product consisted of senarmontite and valentinite. With Sb2O3 evaporation, the PbO content in the molten slag gradually increased, resulting in an increase of PbO content in the product. Based on the overall economic benefits, the evaporation process can be optimized to balance the Sb recovery and the purity of the Sb2O3 product.
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Ling, H., Malfliet, A., Blanpain, B., Guo, M. (2022). Evaporation of Antimony Trioxide from Antimony Slag by Nitrogen Injection in a Top-Submerged Lance Smelting Set-Up. 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_13
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DOI: https://doi.org/10.1007/978-3-030-92388-4_13
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