Authors: Pullum, L; Graham, LJW; Rudman, M; Aldham, B; Hamilton, R


Cite As:
Pullum, L, Graham, LJW, Rudman, M, Aldham, B & Hamilton, R 2006, 'The Ups and Downs of Paste Transport', in R Jewell, S Lawson & P Newman (eds), Proceedings of the Ninth International Seminar on Paste and Thickened Tailings, Australian Centre for Geomechanics, Perth, pp. 395-402.

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Abstract:
Mineral tailings pipelines have to traverse undulating terrain. Paste and high concentration tailings lines convey non-Newtonian slurries and usually contain coarse particles, i.e. > 20 m, that are conveyed as a burden. In presentations at previous Paste conferences papers have been presented that demonstrated that such flows, while appearing to behave homogenously in fact stratify and require higher transport pressure gradients and more care when conveying than their true homogenous paste counterparts, (Pullum and Graham 2000, Pullum 2003, Talmon and Mastbergen 2004). The flows are most readily described using a stratified model and a non-Newtonian version of this type of model has been shown to predict such flows quite well (Pullum et al., 2004). While suitable non-Newtonian models have been devised for transport in horizontal lines the effect of incline on such hybrid suspension flows is yet to be established. A new tilting pipeline rig has been constructed at CSIRO to investigate the behaviour of these complex suspensions and this paper describes this new test facility and reports on preliminary results obtained with a visco-plastic suspension, typical of many non-Newtonian co-disposal systems, e.g. (Houman 2003).

References:
Erocolani, D., Ferrini, F. and Arrigoni, V. (1979) Electric and thermic probes for measuring the limit deposit velocity.
Hydrotransport 6 : Int Conf on the Hydraulic Transport of Solids in Pipes, pp. 27-42.
Graham, L.J.W., Nguyen, B., Wu, J. and Kilpatrick, T. (2005) Improving wall velocity in non-Newtonian mixing tanks, 7th
International Alumina Quality Workshop, Perth Australia, 16-21 October 2005.
Houman, J. (2003) Commissioning and operation of the paste thickening farm at Kimberley combined treatment plant. Pages Section
11 in 2003 International Seminar on Paste and Thickened Tailings. ACG, Melbourne.
Pullum, L. (2003) Pipeline Performance. in Paste 2003. Australian Centre for Geomechanics, Melbourne, Australia.
Pullum, L. and Graham, L.J.W. (2000) Paste pumping - true or false. in Paste 2000. ACG, Perth, Australia.
Pullum, L., Graham, L. and Slatter, P. (2004) A non-Newtonian two layer model and its application to high density hydrotransport. in
16th International Conference on Hydrotransport. BHR group, Santiago.
Talmon, A. and Mastbergen, D. (2004) Solids transport by drilling fluids: Concentrated bentonite-sand-slurries. pp. 641-649. in 12th
Transport and Sedimentation of Solid Particles, Prague, Czech Republic.
Wilson, K.C., and Tse, J.K.P. (1984) Deposition limit for coarse-particle transport in inclined pipes. pp. 149-161. in Int. Conf. on
Hydraulic Transport of Solids in Pipes. BHRA Fluid Engineering, Rome, Italy.
Xu, J., Tipman, R., Gillies, R. and Shook, C. (2002) Centrifugal pump performance with Newtonian and non-Newtonian slurries. pp.
693-709. in Hydrotransport 15. BHR Group Limited, Banff, Canada.
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