Pumping a 100–600 Pa yield stress clay slurry with a centrifugal pump

Authors: Furlan, JM; Visintainer, RJ; Sellgren, A

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DOI https://doi.org/10.36487/ACG_rep/1363_41_Furlan

Cite As:
Furlan, JM, Visintainer, RJ & Sellgren, A 2013, 'Pumping a 100–600 Pa yield stress clay slurry with a centrifugal pump', in R Jewell, AB Fourie, J Caldwell & J Pimenta (eds), Paste 2013: Proceedings of the 16th International Seminar on Paste and Thickened Tailings, Australian Centre for Geomechanics, Perth, pp. 531-543, https://doi.org/10.36487/ACG_rep/1363_41_Furlan

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Abstract:
The pumping of simulated and authentic thickened tailings or paste slurries with centrifugal pumps has been reported from loop tests at the GIW Hydraulic Laboratory, USA. A tendency of a backward sloping head curve for flow rates less than about 50% of the best efficiency region (BEP) has been observed when the solids concentration by volume approaches 50% for authentic tailings slurries. Recent loop testing during froth pump development work has addressed air binding or air lock effects in detail. Despite careful considerations during tailings testing, successive build-up of an air pocket may be the cause of observed difficulties to maintain the head for low flow rates in some cases. An arrangement to remove entrained air in the tank feeding of a standard closed 0.31 m diameter closed impeller pump showed that a phosphate clay slurry with Bingham yield stresses from about 100–600 Pa could be pumped for low flow rates up to about 50% of BEP giving a forward sloping head curve with a derating pattern typical of highly viscous Newtonian fluids. Tailings products often have a considerable portion of particles larger than 75 µm. The two-component behaviour compared to clays calls for a repeated test now with authentic tailings. Thickened tailings derating modelling approaches covering a large span of flow rates are briefly discussed in relation to various factors influencing the tendencies of a backward sloping head curve.

References:
American National Standards Institute/Hydraulic Institute (ANSI/HI) (2010). Effects of liquid viscosity on rotodynamic pump performance, 9.6.7-2010.
Bootle, M.J. (2006) Practical aspects of transporting paste with rotodynamic slurry pumps, in Proceedings Ninth International Seminar on Paste and Thickened Tailings (Paste06), R.J. Jewell, S. Lawson and P. Newman (eds), 3‒7 April 2006, Limerick, Ireland, Australian Centre for Geomechanics, Perth, pp. 413–427.
Burgess, K.E. and Reizes, J.A. (1976) The effect of sizing, specific gravity and concentration on the performance of centrifugal slurry pumps, The Institution of Mechanical Engineers, Vol. 190, No. 36.
Cooke, R. (2007) Thickened and paste tailings pipeline systems-design procedure, Part 2, in Proceedings Tenth International Seminar on Paste and Thickened Tailings (Paste07), A.B. Fourie and R.J. Jewell (eds), 13‒15 March 2007, Perth, Australia, Australian Centre for Geomechanics, Perth, pp. 129–140.
Kabamba, B.M. (2007) Evaluation of derating procedures for centrifugal performance, Magister Technologiae thesis, Cape Peninsula University of Technology, South Africa.
Furlan, J.M. and Visintainer, R.J. (2013) Characterization and prediction of froth pump performance, accepted for publication, S.K. Kawatra (ed), Minerals and Metallurgical Processing Journal, Society for Mining, Metallurgy & Exploration (SME), Englewood, CO, USA.
Graham, L.J.W., Pullum, L., Slatter, P., Sery, G. and Rudman, M. (2009) Centrifugal pump performance calculation for homogeneous suspensions, The Canadian Journal of Chemical Engineering, Vol. 87, Issue 4, August, pp. 526–533.
Paterson, A.J.C. (2005) Determining the optimum location of a high rate thickener for a thickened tailings system, in Proceedings Eighth International Seminar on Paste and Thickened Tailings (Paste05), R.J. Jewell and S. Barrera (eds), 20‒22 April 2005, Santiago, Chile, Australian Centre for Geomechanics, Perth, pp. 177–184.
Pullum, L., Graham, L. and Wu, J. (2011) Centrifugal pump performance with non-Newtonian slurries, in Proceedings 15th International Conference on Transportation and Sedimentation of Solids Particles, 6–9 September 2011, Wroclaw, Poland, pp. 115–129.
Sellgren, A. and Addie, G. (1994) Pump solids effect when handling non-settling slurries, in Proceedings Hydromechanisation, Miskolc, Hungary.
Sellgren, A., Addie, G. and Whitlock, L. (2005) Technical-economical feasibility of using centrifugal slurry pumps in high-density thickened tailings slurry systems, in Proceedings Eighth International Seminar on Paste and Thickened Tailings (Paste05), R.J. Jewell and S. Barrera (eds), 20‒22 April 2005, Santiago, Chile, Australian Centre for Geomechanics, Perth, pp. 195–204.
Sellgren, A. (2012) Advances in thickened tailings pumping using centrifugal pumps, in Proceedings 15th International Seminar on Paste and Thickened Tailings (Paste 2012), R.J. Jewell, A.B. Fourie and A. Paterson (eds), 16–19 April 2012, Sun City, South Africa, Australian Centre for Geomechanics, Perth, pp. 285–295.
Sellgren, A., Mustafa, A., Addie, G.A. and Whitlock, L. (2011) Performance of different centrifugal pump impeller configurations when pumping thickened tailings, in Proceedings 14th International Seminar on Paste and Thickened Tailings (Paste2011), R.J. Jewell and A.B. Fourie (eds), 5‒7 April 2011, Perth, Australia, Australian Centre for Geomechanics, Perth, pp. 405–415.
Visintainer, R.J. and Whitlock, W.L. (2012) Development and testing of a more effective froth handling pump, 44th Annual Canadian Mineral Processors Conference, Ottawa, Ontario.
Walker, C.I. and Goulas, A. (1984) Performance characteristics of centrifugal pump when handling Non-Newtonian slurries, Proceedings of the Institute Mechanical Engineers, 198A, pp. 41–49.
Warman International (1991) Pumping non-Newtonian slurries, Technical Bulletin No. 14, Warman International.
Wennberg, T. (2010) Transporting highly concentrated slurries with centrifugal pumps, the thickened minerals tailings example, Licentiate thesis, Department of Chemical Engineering, Geoscience and Mineral Processing, Luleå University of Technology, Lulea, Sweden.
Wilson, K.C., Addie, G.R., Sellgren, A. and Clift, R. (2006) Slurry transport using centrifugal pumps, 3rd edition, Blackie Academic and Professional (Chapman and Hall), London, UK.




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