Simms, P, Grabinsky, M & Zhan, G 2006, 'Evaporation from Surface Deposited Thickened Gold Tailings', 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. 267-274.
The rate of evaporation from thickened tailings is an important parameter for the management of surface
deposition. Promoting evaporation in a freshly-deposited layer is desirable up to a point, since evaporation
causes densification and strength gain, but excess evaporation will desaturate the tailings and consequently
increase the risk of acid generation. Therefore, the ability to predict the rate of evaporation to some degree
of accuracy would be a substantial advantage in deposition planning. This study, part of a larger project
researching the surface deposition of non-plastic, thickened tailings at the Bulyanhulu Gold Mine in
Tanzania, investigates drying from thickened gold tailings in the laboratory and in the field. Material
presented in this paper includes laboratory comparison of evaporation from a small column (0.3 m diameter
by 0.2 m in height) to evaporation from larger-scale tests (2 m by 1 m in plan and 0.1 m in thickness)
performed on tailings from Bulyanhulu. These laboratory results are compared with field measurements.
Crowder, J.J. (2004) Deposition, consolidation, and strength of a non-plastic tailings paste for surface disposal. Doctoral Thesis,
University of Toronto.
Fujiyasu, Y. and Fahey, M. (2000) Experimental study of evaporation from saline tailings, Journal of Geotechnical and
Geoenvironmental Engineering 126(1) 18-27.
Fujiyasu, Y., Fahey, M. and Newson, T. (2000) Field investigation of evaporation from freshwater tailings. Journal of Geotechnical
and Geoenvironmental Engineering 126(6) 556-567.
Golder Associates Africa (Golder) (2005) Report on Bulyanhulu Gold Mine Tailings Storage Facility Optimization of Deposition.
Report No. 5098/6586/5/S
Simms, P.H, and Grabinsky, M.W. (2004) A simple method for estimating rates of drying and desaturation of paste tailings during
surface depostion. Proceedings of the 11th annual conference on Tailings and Mine Waste, October 10-13th 2004, pp. 287-292.
Simms, P.H., Grabinsky, M.W. and Zhan, G. (2005) Laboratory evaluation of evaporative drying from surface deposited thickened
tailings at the Bulyanhulu gold mine. Canadian Geotechnical Conference, Saskatoon, Saskatchewan, Sept. 18-21 2005
Wilson, G.W., Fredlund, D.G. and Barbour, S.L. (1994) Coupled soil-atmosphere modeling for soil evaporation. Canadian
Geotechnical Journal 31, pp. 151-161.