Thickeners versus centrifuges – a coal tailings technical comparison

Authors: Meiring, S Download Paper

DOI https://doi.org/10.36487/ACG_rep/1504_02_Meiring

Cite As:
Meiring, S 2015, 'Thickeners versus centrifuges – a coal tailings technical comparison', in R Jewell & AB Fourie (eds), Paste 2015: Proceedings of the 18th International Seminar on Paste and Thickened Tailings, Australian Centre for Geomechanics, Perth, pp. 55-65, https://doi.org/10.36487/ACG_rep/1504_02_Meiring



Abstract:
Both high-rate thickeners and dewatering centrifuges are used in the application of dewatering coal tailings. Both applications are well advanced and accepted as means to dewater coal. This paper compares a high-rate thickener to a solid bowl centrifuge with respect to numerous process, mechanical, electrical, control, layout and operator variables. Process variables include feed, effluent water discharge, retention time, and centrifuge cake moisture/thickener underflow percent solids. A comparison of a 33 m diameter thickener and a 1.117 m diameter solid bowl centrifuge with respect to g square meters is shared. The suitability of the dewatering application is governed by the properties of the resultant solids mixture. Different ash tailings, particularly those containing clay, presented a challenge to both the operations of the thickener and the centrifuge. A holistic view to the entire process is required.

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