Effects of polyethylenimine dosages and molecular weights on flocculation, rheology and consolidation behaviors of kaolin slurries

Hogg, 2000, Flocculation and dewatering, Int. J. Miner. Process., 58, 223, 10.1016/S0301-7516(99)00023-X Mpofu, 2003, Investigation of the effect of polymer structure type on flocculation, rheology and dewatering behaviour of kaolinite dispersions, Int. J. Miner. Process., 71, 247, 10.1016/S0301-7516(03)00062-0 Nasser, 2006, The effect of polyacrylamide charge density and molecular weight on the flocculation and sedimentation behaviour of kaolinite suspensions, Sep. Purif. Technol., 52, 241, 10.1016/j.seppur.2006.04.005 Addai-Mensah, 2007, Enhanced flocculation and dewatering of clay mineral dispersions, Powder Technol., 179, 73, 10.1016/j.powtec.2006.11.008 Taylor, 2002, Kinetics of adsorption of high molecular weight anionic polyacrylamide onto kaolinite: the flocculation process, J. Colloid Interface Sci., 250, 28, 10.1006/jcis.2002.8341 McFarlane, 2005, Optimising the dewatering behaviour of clay tailings through interfacial chemistry, orthokinetic flocculation and controlled shear, Powder Technol., 160, 27, 10.1016/j.powtec.2005.04.046 McFarlane, 2008, The influence of flocculant adsorption kinetics on the dewaterability of kaolinite and smectite clay mineral dispersions, Colloids Surf. A, 317, 39, 10.1016/j.colsurfa.2007.09.045 Besra, 2002, Flocculation and dewatering of kaolin suspensions in the presence of polyacrylamide and surfactants, Int. J. Miner. Process., 66, 203, 10.1016/S0301-7516(02)00066-2 Besra, 2004, Influence of polymer adsorption and conformation on flocculation and dewatering of kaolin suspension, Sep. Purif. Technol., 37, 231, 10.1016/j.seppur.2003.10.001 Besra, 2006, Influence of unadsorbed and weakly adsorbed flocculants on separation properties of kaolin suspensions, Int. J. Miner. Process., 78, 101, 10.1016/j.minpro.2005.09.004 Addai-Mensah, 2007, The influential role of pulp chemistry, flocculant structure type and shear rate on dewaterability of kaolinite and smectite clay dispersions under couette Taylor flow conditions, Powder Technol., 179, 79, 10.1016/j.powtec.2006.11.007 Pearse, 2003, Historical use and future development of chemicals for solid–liquid separation in the mineral processing industry, Miner. Eng., 16, 103, 10.1016/S0892-6875(02)00288-1 Biggs, 2000, Aggregate structures formed via a bridging flocculation mechanism, Chem. Eng. J., 80, 13, 10.1016/S1383-5866(00)00072-1 Swenson, 1999, Structure of bridging polymers, J. Chem. Phys., 110, 9750, 10.1063/1.478940 Gregory, 1976, The effect of cationic polymers on the colloidal stability of latex particles, J. Colloid Interface Sci., 55, 35, 10.1016/0021-9797(76)90006-0 Horn, 1980, Poly (ethylenimine)–physicochemical properties and applications, 333 Alince, 1993, Stability of clay suspensions—effect of pH and polyethylenimine, J. Colloid Interface Sci., 155, 465, 10.1006/jcis.1993.1060 Gill, 1987, The flocculation of kaolin suspensions using polyethylenimine and cationic polyacrylamides of the same molar mass but different charge density, Colloids Surf., 28, 41, 10.1016/0166-6622(87)80165-8 McFarlane, 2005, Microstructure, rheology and dewatering behaviour of smectite dispersions during orthokinetic flocculation, Miner. Eng., 18, 1173, 10.1016/j.mineng.2005.06.013 Boger, 2006, Rheological concepts, 25 Johnson, 1999, The electrokinetic and shear yield stress properties of kaolinite in the presence of aluminium ions, Colloids Surf. A, 146, 281, 10.1016/S0927-7757(98)00726-2 Michaels, 1962, Settling rates and sediment volumes of flocculated kaolin suspensions, Ind. Eng. Chem. Fundam., 1, 24, 10.1021/i160001a004 Du, 2009, A cryo-SEM study of aggregate and floc structure changes during clay settling and raking processes, Int. J. Miner. Process., 93, 66, 10.1016/j.minpro.2009.06.004 Farrow, 2000, Consolidation and aggregate densification during gravity thickening, Chem. Eng. J., 80, 141, 10.1016/S1383-5866(00)00083-6 Avadiar, 2012, 1034 Mészáros, 2004, Adsorption of poly(ethyleneimine) on silica surfaces: effect of pH on the reversibility of adsorption, Langmuir, 20, 5026, 10.1021/la049611l Zhu, 2007, Effect of polyethylenimine on hydrolysis and dispersion properties of aqueous Si3N4 suspensions, J. Am. Ceram. Soc., 90, 797, 10.1111/j.1551-2916.2007.01491.x Gregory, 2005 Weissenborn, 1995, Selective flocculation of ultrafine iron ore 2. Mechanism of selective flocculation, Colloids Surf. A, 99, 29, 10.1016/0927-7757(95)03112-Q Farrow, 1989, The measurement of floc density–floc size distributions, 153 Farrow, 1989, A new technique for characterizing flocculated suspensions, 61 Ray, 1987, Agglomerate breakage in polymer-flocculated suspensions, J. Colloid Interface Sci., 116, 256, 10.1016/0021-9797(87)90119-6 Swenson, 1998, Mechanism and strength of polymer bridging flocculation, Phys. Rev. Lett., 81, 5840, 10.1103/PhysRevLett.81.5840 Tripathy, 2006, Flocculation: a new way to treat the waste water, J. Phys. Sci., 10, 93 Lee, 1991, Adsorption of polyacrylamides on the different faces of kaolinites, J. Colloid Interface Sci., 147, 351, 10.1016/0021-9797(91)90167-7 Nabzar, 1986, Formation and properties of the kaolinite–polyacrylamide complex in aqueous media, Soil Sci., 141, 113, 10.1097/00010694-198602000-00003 Zaman, 2003, Effects of polymer bridging and electrostatics on the rheological behavior of aqueous colloidal dispersions, Part. Part. Syst. Charact., 20, 342, 10.1002/ppsc.200390041 Leong, 1999, Interparticle forces arising from an adsorbed strong polyelectrolyte in colloidal dispersions: charged patch attraction, Colloid Polym. Sci., 277, 299, 10.1007/s003960050385 Gregory, 1988, Polymer adsorption and flocculation in sheared suspensions, Colloids Surf., 31, 231, 10.1016/0166-6622(88)80196-3 Csempesz, 1988, The effect of polymer bridging on the flocculation kinetics of colloidal dispersions, Colloids Surf., 31, 215, 10.1016/0166-6622(88)80195-1 Yu, 1996, Role of polymer conformation in interparticle-bridging dominated flocculation, J. Colloid Interface Sci., 177, 283, 10.1006/jcis.1996.0033