Browse > Article

Comparison of the rheologies of laterite and goethite suspensions  

James, David F. (Department of Mechanical and Industrial Engineering, University of Toronto)
Blakey, Brian C. (Department of Chemical Engineering and Applied Chemistry, University of Toronto)
Publication Information
Korea-Australia Rheology Journal / v.16, no.3, 2004 , pp. 109-115 More about this Journal
Abstract
Comparisons in shear behaviour are made between aqueous suspensions of a laterite ore and aqueous suspensions of pure goethite ($\alpha$-FeOOH), following prior papers in which the rheologies of the two mineral suspensions were characterized individually. Drawing comparisons is appropriate because the ore sample was about 65% goethite and it was originally thought that the pure goethite might serve as a model of the more complex laterite. Viscosity measurements of the two suspensions show that, at the same solids fraction, the goethite suspensions were more viscous by an order of magnitude, even though the goethite particles had much smaller aspect ratios. Similarly, yield stresses for the goethite suspensions were at least an order of magnitude higher. The most significant difference was in transient behaviour. Time-dependent effects were investigated by subjecting a fluid to a step change or a ramp sequence in shear rate, and measuring the resulting shear stress over time. In most cases, transient behaviour could not be detected in the goethite suspensions, whereas stresses in the laterite suspensions relaxed over periods of order 10 seconds. The disparate results indicate that a goethite suspension is a poor model of a laterite slurry.
Keywords
suspension; slurry; mineral; goethite; laterite; model fluid; flocculation; viscosity; yield stress; time dependence;
Citations & Related Records

Times Cited By Web Of Science : 9  (Related Records In Web of Science)
Times Cited By SCOPUS : 9
연도 인용수 순위
1 Avramidis, K.S. and R.M. Turian, 1991, Yield Stress of Laterite Suspensions, J. Colloid Interface Sci. 143, 54-68   DOI   ScienceOn
2 Cerpa, A., M.T. Garcia-Gonzalez, P. Tartaj, J. Requena, L.R. Garcell and C.J. Serna, 1996, Rheological Properties of Concentrated Lateritic Suspensions, Progr. CoIloid. PoIym. Sci. 100, 266-270   DOI
3 Green, M.D. and D.V. Boger, 1997, Yielding of Suspensions in Compression, Ind. Eng. Chem. Res. 36, 4984-4992   DOI   ScienceOn
4 Krause, E., B.C. Blakey and V.G. Papangelakis, 1998, 'Pressure Leaching of Nickeliferous Laterite Ores', in ALTA 1998: Nickel/Cobalt Pressure Leaching and Hydrometallurgy Forum, ALTA Metallurgical Services, Melbourne, Australia
5 Lataillade, J-L., J. Pouyet and C. Signoret, 1980, Ad$\quation dun dispositif de torsion dynamique par barres de Hopkinson pour l$\tude rh$\ologique en cisaillement quasi uniform des polym$\`e$res solides a grande vitesse de glissement; r$\sultats pr$\liminaires, C.R. Acad. Sc. Paris 290, S$\rie B, 219-222
6 Mezei, A., C.J. Ferron and M. Ashbury, 1999, Practical Aspects of Rheological Studies for the Mineral and Process Slurhes, in Rheology in the Mineral and Energy Industries II, Hawaii
7 Turian, R.M., T.W. Ma, F.L.G. Hsu and D.J. Sung, 1997, Characterization, Settling, and Rheology of Concentrated Fine Particulate Mineral Slurries, Powder Tech. 93, 219-233   DOI   ScienceOn
8 Rodriguez Nino, M.R., P.J. Wilde, D.C. Clark and J.M. Rodriguez Patino, 1996, Surface Rheological Properties of Monostearin and Monoolein Films Spread on the Air-Aqueous Phase Interface, Ind. Eng. Chem. Res. 35, 4449-4456   DOI   ScienceOn
9 Blakey, B.C. and D.F. James, 2003A, Characterizing the Rheology of Laterite Suspensions, Int. J. Miner. Process. 70, 23-39   DOI   ScienceOn
10 Avotins, P.V, S.S. Ahlschlager and G.R. Wicker, 1979, The Rheology and Handling of Laterite Slurries, in Proc. International Laterite Symposium, Evans, D.J.I, R.S. Shoemaker and H. Veltman, eds., AIME, New Orleans, LA
11 Kanai, H. and T. Amari, 1986, Negative Thixotropy in Ferric-Oxide Suspensions, RheoIoey Acta 34, 303-310
12 Blakey, B.C. and D.F. James, 2003B, The Viscous Behaviour and Structure of Aqueous Suspensions of Goethite, Colloids Surf. A. 231, 19-30   DOI   ScienceOn
13 Bhattacharya, I.N., D. Panda and P. Bandopadhyay, 1998, Rheological Behaviour of Nickel Laterite Suspensions, Int. J. Miner. Process. 53, 251-263   DOI   ScienceOn
14 Blakey, B.C., 2002, The Viscous Behaviour of Aqueous Goethite-Containing Suspensions, PhD Thesis, University of Toronto
15 Weiss, J. and D. J. McClements, 2000, Influence of Ostwald Ripening on Rheology of Oil-in-Water Emulsions Containing Electrostatically Stabilized Droplets, Langmuir 16, 2145-2150   DOI   ScienceOn
16 Chang, J.C., F.F. Lange and D.S. Pearson, 1994, Viscosity and Yield Stress of Alumina Slurries Containing Large Concentrations of Electrolyte, J. Am. Ceram. Soc. 77, 19-26   DOI   ScienceOn