Authors: Yan, S; Jiao, H; Chen, X; Yang, Y; Han, Z; Liu, Z; Sun, G


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Yan, S, Jiao, H, Chen, X, Yang, Y, Han, Z, Liu, Z & Sun, G 2017, 'Yield stress of unclassified tailings paste based on L-Box method', in A Wu & R Jewell (eds), Paste 2017: Proceedings of the 20th International Seminar on Paste and Thickened Tailings, University of Science and Technology Beijing, Beijing, pp. 87-93,

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The rheological parameters of unclassified tailings paste were tested by L-Box method and using a vane-rheometer in order to calculate the frictional drag, and then detect the results accuracy of L-Box method. The results show that, yield stress increased from 68.9~73.4 to 212.4~225.1 Pa along with the increase of paste concentration from 72 to 78%. Furthermore, yield stress increased exponentially with slurry concentration and featured a sharp increase when concentration increased from 76 to 78%. The results of L-Box method and vane-rheometer were similar, although that of the latter was slightly greater, with the deviation being 0.65 to 11.89% (its average being 7.18%). The calculated frictional drag was 3.39 ~ 6.6MPa/km with a backfill capacity of 60 m3/h, pipe diameter of DN150, and slurry concentration of 74~78%.

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