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
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.
Aldea, CM & Connolly, K 2014, ‘Successful recipes for mine paste backfill’, in RJ Jewell, AB Fourie, PS Wells & D van Zyl (eds), Proceedings of the 17th International Seminar on Paste and Thickened Tailings, InfoMine Inc., Vancouver, pp. 341-354.
Alfa Laval n.d., No more new tailings dam, Rix’s Creek Case Story, Alfa Laval, Huntingwood.
Bickert, G & Langer, B 2012, Maximising water recovery in an operating paste thickener, ACARP report C18042, Australian Coal Research Limited, Brisbane.
Lamb, H 1945, Hydrodynamics, Dover Publications, New York.
Leung, WW-F 1998, Industrial centrifugation technology, McGraw-Hill, New York.
Meiring, S 2014, Lessons from Thickener Pilot Plant Testing: Experiences Shared, Section 3.5 Anomalies in results page 9.
Triglavcanin, RA 2008, ‘The heart of thickener performance’, in AB Fourie, RJ Jewell, PT Slatter & A Paterson (eds), Proceedings of the Eleventh International Seminar on Paste and Thickened Tailings, Australian Centre for Geomechanics, Perth, pp. 63-82.