Separation of flocs in hydrocyclones-significance of floc breakage and floc hydrodynamics

International Journal of Mineral Processing

Volumn 73, Issue 2-4, 2004, Pages 239-249

  Woodfield, D ^a   Bickert, G ^b  

^a Comalco Res/Technical Support ^*  (Australia)

^b UNIVERSITY OF NEW SOUTH WALES   (Australia)

Author keywords

Floc structure; Flocculant; Hydrocyclone; Separation

Indexed keywords

COMPUTER SIMULATION; FLOCCULATION; MATHEMATICAL MODELS; PARTICLE SIZE ANALYSIS; SEPARATION; WATER;

FLOC SIZE DISTRIBUTION; HYDROCLONES;

HYDRODYNAMICS;

FLOCCULANT; HYDROCYCLONE; HYDRODYNAMICS; LIQUID-SOLID SEPARATION; THICKENING;

EID: 0742287894     PISSN: 03017516     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0301-7516(03)00076-0     Document Type: Article

References (30)

1. Bell D.J. Brunner K.H. A method for the evaluation of floc break-up in centrifuges Filtration and Separation 20 4 1983 274-278
2. Bidault A. Clauss A. Helaine D. Balavoice C. Floc agglomeration and structuration by a specific talc mineral composition Water Science and Technology 36 4 1997 57-68
3. Bradley D. The Hydrocyclone 1965 Pergamon Oxford
4. Bradley D. Pulling D.J. Flow patterns in the hydraulic cyclone and their interpretation in terms of performance Transactions of the Institute of Chemical Engineers 37 1959 34-45
5. Brinkman H.C. A calculation of the viscous force exerted by a flowing fluid on a dense swarm of particles Applied Scientific Research. Section A. Mechanics, Heat Chemical Engineering Mathematical Methods A1 1947 27-34
6. Bushell G.C. Yan Y.D. Woodfield D. Raper J. Amal R. On techniques for the measurement of the mass fractal dimension of aggregates Advances in Colloid and Interface Science 95 2002 1-50
7. Camp T.R. Stein P.C. Velocity gradients and internal work in fluid motion Journal of the Boston Society of Civil Engineers 30 4 1943 219-237
8. Dyakowski T. Williams R.A. Modelling turbulent flow within a small-diameter hydrocyclone Chemical Engineering Science 48 6 1993 1143-1152
9. Farrow J.B. Swift J.D. A new procedure for assessing the performance of flocculants International Journal of Mineral Processing 46 1996 263-275
10. Flambeau M. Effect of flocculation on the separation of fine particles in a hydrocyclone Chemical Engineering 1987 70-80 UMIST Manchester
11. Flintoff B.C. Plitt L.R. Turak A.A. Cyclone modelling: a review of present technology Canadian Institute of Mining Bulletin 80 905 1987 39-50
12. Geisler R. Krebs R. Forschner P. Local turbulent shear stress in stirred vessels and its significance for different mixing tasks Eighth European Conference on Mixing: IChemE 1994
13. Griffiths S. The effect of agitator impeller design on maximum shear stress, and the resulting impact on the flocculation process Water and Environmental Management 10 5 1996 324-331
14. Haider A. Levenspiel O. Drag coefficient and terminal velocity of spherical and non-spherical particles Powder Technology 58 1989 63-70
15. Happel J. Brenner H. Low Reynolds Number Hydrodynamics 1973 Noordhoff International Leyden
16. Heiskanen K. Particle Classification 1993 Chapman - Hall London
17. Jackson G.A. Using fractal scaling and two-dimensional particle size spectra to calculate coagulation rates for heterogeneous systems Journal of Colloid and Interface Science 202 1998 20-29
18. Kerbey M.H. Williams R.A. Magnetic tagging technology-extending the potential of magnetic separation Innovation in Physical Separation Technologies-Richard Mozley Memorial Volume 1997 231-244 The Institution of Mining and Metallurgy Falmouth, UK
19. Kruger, 1999. The Actiflo Process, http://www.vivendiwatersystems.dk.
20. Leadbetter T. White D.A. Use of coarse sand particles to aid ferric hydroxide floc dewatering by hydrocyclones Transactions Institution Mining Metallurgy. Section C. Mineral Processing, Extractive Metallurgy 95 1986 C209-C211
21. Lilge E.O. Hydrocyclone fundamentals Transactions Institution Mining Metallurgy 71 285 1962 285-337
22. Poole C. Beeson S.A. Hydrocyclone recovery of flocculated sylvite from potash ore Innovation in Physical Separation Technologies-Richard Mozley Symposium Volume 1997 171-182 The Institution of Mining and Metallurgy Falmouth, UK
23. Svarovsky L. Hydrocyclones 1984 Technomic Lancaster, PA
24. Tambo N. Watanabe Y. Physical characteristics of flocs: I. The floc density function and aluminium floc Water Research 13 1979 409-419
25. US-Filter, 1999. MicroSep-Technology, http.//www.water.usfilter.com/ microsep.html.
26. Williams R.A. Roldan-Villasana E.J. Opportunities for dewatering aggregated colloidal materials using small diameter hydrocyclones Williams R.A. de Jaegar N.C. Advances in Measurement and Control of Colloidal Processes 1991 18-34 Butterworth Oxford
27. Williams R.A. Roldan-Villasana E.J. Classification and breakage of flocs in hydrocyclones Minerals Engineering 12 10 1999 1225-1243
28. Woodfield, D.L., 2001. The separation behaviour of aggregates in hydrocyclones. School of Chemical Engineering and Industrial Chemistry, University of New South Wales, Sydney, pp. 70-93 and pp. 157-163.
29. Woodfield D.L. Bickert G. An improved permeability model for fractal aggregates settling in creeping flow Water Research 35/16 2001 39-44
30. Yalcin T. Tailings disposal using flocculant-assisted hydrocyclones Canadian Institute of Mining Bulletin 89 1005 1996 98-100