Abstract
Coal with high content (with higher content of undissociated mineral) of middles is difficult-to-separate, which is one of the key factors to influence coal flotation result. This paper analysis properties of two kinds of different feeds of coal slime and the coarse particles, and determine the dissociation degrees of slime through the the density composition. At the meantime, flotation tests have been carried out with better dissociation degree coal slime. The experiment results show that coal slime directly grinding time with 15min, -0.074mm fineness taking 86.85% is appropriate to float, and graded coarse coal grinding time with 10min, -0.074mm fineness taking 46.19% is appropriate to float. Flotation effects are obvious, and clean coal recovery rate increased significantly. The feasibility of coal grinding to dissociation was verified through the grindability index. The grindability index of coal slime is 74.09%, and that of coarse particles is 76.01%. These will inevitably cause difference of energy consumption in grinding process.
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© 2016 Springer International Publishing Switzerland
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Lijun, L., Wei, Y., Anning, Z., Zhen, L. (2016). Research on difficult-to-separate coal grinding-dissociation and flotation process. In: Litvinenko, V. (eds) XVIII International Coal Preparation Congress. Springer, Cham. https://doi.org/10.1007/978-3-319-40943-6_143
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DOI: https://doi.org/10.1007/978-3-319-40943-6_143
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