Shear-induced floc structure changes for enhanced dewatering of coal preparation plant tailings

Chemical Engineering Journal

Volumn 172, Issue 2-3, 2011, Pages 914-923

  Ofori, Philip ^a   Nguyen, Anh V ^b   Firth, Bruce ^a   McNally, Clint ^a   Ozdemir, Orhan ^b,c  

^a CSIRO   (Australia)

^b UNIVERSITY OF QUEENSLAND   (Australia)

^c ISTANBUL UNIVERSITY   (Turkey)

Author keywords

Coal tailings; Dewatering; Fractal analysis; Shear induced flocculation

Indexed keywords

BATCH MODES; CLAY MATERIALS; COAL PREPARATION PLANTS; COMPACT STRUCTURES; COMPLEX STRUCTURE; DIFFERENT SIZES; DISPOSAL METHODS; FLOC STRUCTURE; FRACTAL ANALYSIS; HIGH MOLECULAR WEIGHT; HYDRODYNAMIC CONDITIONS; LASER SCATTERING; MINERAL PROCESSING PLANTS; MIXING SPEED; NETWORK STRUCTURES; PARTICULATE MATTER; SCATTERING TECHNIQUES; SEDIMENT DENSITIES; SETTLING RATE; SHEAR-INDUCED FLOCCULATION; TAILINGS DEWATERING; WATER RECOVERY;

ANOXIC SEDIMENTS; CLAY MINERALS; COAL HANDLING; COAL INDUSTRY; COAL PREPARATION; COAL SLURRIES; COAL TAILINGS; DEWATERING; FLOCCULATION; FRACTAL DIMENSION; HYDRODYNAMICS; SEDIMENTOLOGY; SHEAR FLOW; WASTE DISPOSAL;

TAILINGS DISPOSAL;

EID: 84860417156     PISSN: 13858947     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.cej.2011.06.082     Document Type: Article

References (16)

1. Scott K.J. Continuous thickening of flocculated-suspensions. Comparison with batch settling tests and effect of floc compression using pyrophyllite pulp. Industrial and Engineering Chemistry Fundamentals 1970, 9(3):422-427.
2. Farrow J.B., Johnston R.M., Simic K., Swift J.D. Consolidation and aggregate densification during gravity thickening. Chemical Engineering Journal 2000, 80:141-148.
3. Johnson S.B., Scales P.J., Dixon D.R., Pascoe M. Use of superthickener device to concentrate protable water sludge. Water Research 2000, 34(1):288-294.
4. Mpofu P., Addai-Mensah J., Ralston J. Investigation of the effect of polymer structure type on flocculation, rheology and dewatering behaviour of kaolinite dispersions. International Journal of Mineral Processing 2003, 71:247-268.
5. McFarlane A., Bremmell K., Addai-Mensah J. Improved dewatering behaviour of clay minerals dispersions via interfacial chemistry and particles interactions optimization. Journal of Colloid and Interface Science 2006, 293:116-127.
6. Hogg R. Flocculation and dewatering. International Journal of Mineral Processing 2000, 58:223-236.
7. Dentel S.K., Abu-Orf M.M., Walker C.A. Optimisation of slurry flocculation and dewatering based on electrokinetic and rheological phenomena. Chemical Engineering Journal 2000, 80:65-72.
8. Scott J.P., Fawell P.D., Ralph D.E., Farrow J.B. The shear degradation of high-molecular-weight flocculant solutions. Journal of Applied Polymer Science 1996, 62:2097-2106.
9. Bushell G.C., Yan Y.D., Woodfield D., Raper J., Amal R. On techniques for measurement of the mass fractal dimensions of aggregates. Advances in Colloid and Interface Science 2002, 95:1-50.
10. Biggs S., Hapgood M., Jameson J.G., Yan Y.D. Aggregate structures formed by bridging flocculation mechanism. Chemical Engineering Journal 2000, 80:13-22.
11. Lin M.Y., Lindsay H.M., Weitz D.A., Ball R.C., Klein R.P., Meakin R. Physical Review A 1990, 41:2005.
12. Taylor J.C. Computer programs for standardless quantitative analysis of minerals using the full powder diffraction profile. Powder Diffraction 1991, 6(1):2-9.
13. Schmidt P.W. Use of scattering to determine the fractal dimension. The Fractal Approach to Heterogenous Chemistry 1989, 67-79. John Wiley & Sons, Chichester. D. Avnir (Ed.).
14. Liao J.Y.H., Selomulya C., Bushell G., Bickert G., Amal R. On different approaches to estimate the mass fractal dimension of coal aggregates. Particle & Particle Systems Characterization 2005, 22(5):299-309.
15. Pusey P.N., Pirie A.D., Poon W.C.K. Dynamics of colloid polymer mixtures. Physica A 1993, 201:322-331.
16. Kilfoil M.L., Pashkovski E.E., Masters J.A., Weitz D.A. Dynamics of weakly aggregated colloidal particles. Philosophical Transactions of the Royal Society of London: Series A 2003, 361:753-766.