Abstract
In the world, the coal fines usually are upgraded in flotation columns (Jameson, Pneufloat, Microcell cells, etc.). Reflux flotation cell is a novel type of flotation column that uses a system of inclined channels to enhance bubble - liquid segregation in flotation. Additionally, in this type of device, a unique froth washing mechanism with pressurized water is used to ameliorate the quality of clean coal. This type of device has a simple structure, high capacity, and allows the receiving of high-quality clean coal. This paper presents the test results of coal fines samples −0.3 mm from Vang Danh underground coal mine (in Quang Ninh, Vietnam) by flotation in a laboratory Reflux flotation cell. The test results show that combined clean coal can be received with the ash content less than 15% and the combustible recovery of more than 80%. This cleaned coal meets the quality standard of 3B fine coals (ash content of 14–16%). The flotation tailing with the ash content of more than 70% can be rejected.
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Dung, N.T.K., Son, N.H., Chinh, V.T., Van Duoc, T. (2021). Upgrading of Vang Danh Coal Fines Using Reflux Flotation Cell. In: Bui, XN., Lee, C., Drebenstedt, C. (eds) Proceedings of the International Conference on Innovations for Sustainable and Responsible Mining. Lecture Notes in Civil Engineering, vol 109. Springer, Cham. https://doi.org/10.1007/978-3-030-60839-2_23
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DOI: https://doi.org/10.1007/978-3-030-60839-2_23
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