Cites 2016

Influence of controlled dispersion on rheology of swelling clay suspensions in the presence of coal flotation reagents

Mingqing Zhang 1  ,  
Yijun Cao 2,  
Wei Yu 1
School of Environmental Science & Spatial Informatics, China University of Mining & Technology
National Engineering Research Centre of Coal Preparation and Purification, China University of Mining & Technology
Physicochem. Probl. Miner. Process. 2017;53(2):1148–1160
Publish date: 2017-05-14
Swelling clay minerals, which are innately capable of dispersing into thin flakes in water, can significantly depress coal flotation. Some researchers partially attribute depression to pulp viscosity increments. This study sought to understand the role of swelling clay minerals in fine coal flotation, by investigating the rheological behavior of bentonite suspensions under controlled and uncontrolled dispersion conditions. The effect of collector, frother, and solution pH on rheological properties of the pulp was studied. Findings showed that at a natural pH, Newtonian flow properties were displayed when bentonite was directly added into a swelling suppressed solution containing calcium ions. The same process was repeated under uncontrolled conditions, and the suspensions transferred from Newtonian to non-Newtonian flows with pseudo-plastic characteristics, depending on the solid density. Further, pH value, methyl isobutyl carbinol (MIBC) and kerosene had the potential to alter the rheological behavior of controlled and uncontrolled systems, especially pH value in the uncontrolled system.
Mingqing Zhang   
School of Environmental Science & Spatial Informatics, China University of Mining & Technology
1. ARNOLD, B.J., APLAN, F.F., 1986, The effect of clay slimes on coal flotation, part I: The nature of the clay. International Journal of Mineral Processing, 17, 225-242.
2. BAKKER, C.W., MEYER, C.J., DEGLON, D.A., 2009, Numerical modelling of non-Newtonian slurry in a mechanical flotation cell. Minerals Engineering, 22, 944-950.
3. BRANDENBURG, U., LAGALY, G., 1988, Rheological properties of sodium montmorillonite dispersions. Applied Clay Science, 3, 263-279.
4. CRUZ, N., PENG, Y., WIGHTMAN, E., XU, N., 2015, The interaction of clay minerals with gypsum and its effects on copper–gold flotation. Minerals Engineering, 77, 121-130.
5. DEASON, D.M., ONODA, G.Y., 1984, Controlled dispersion of clays and its effects on phosphate clay dewatering. Minerals & Metallurgical Processing, 1, 149.
6. FARROKHPAY, S., 2012, The importance of rheology in mineral flotation: A review. Minerals Engineering, 36–38, 272-278.
7. FIRTH, B.A., NICOL, S.K., 1981, The influence of humic materials on the flotation of coal. International Journal of Mineral Processing, 8, 239-248.
8. HANG, P.T., BRINDLEY, G.W., 1970, Methylene blue absorption by clay minerals. Detemination of surface areas and cation exchange capacities (clay–organic studies XVIII). Clays and Clay Minerals, 18, 203-212.
9. HE, M., WANG, Y., FORSSBERG, E., 2004, Slurry rheology in wet ultrafine grinding of industrial minerals: a review. Powder Technology, 147, 94-112.
10. LAGALY, G., 1989, Principles of flow of kaolin and bentonite dispersions. Applied Clay Science, 4, 105-123.
11. LIM, J., DE KRETSER, R.G., SCALES, P.J., 2009, Investigating the influence of total electrolyte concentration and sodium–calcium ion competition on controlled dispersion of swelling clays. International Journal of Mineral Processing, 93, 95-102.
12. MORRIS, G.E., ŻBIK, M.S., 2009, Smectite suspension structural behaviour. International Journal of Mineral Processing, 93, 20–25.
13. MUELLER, S., LIEWELLIN, E.W., MADER, H.M., 2010, The rheology of suspensions of solid particles. Proceedings of the Royal Society, 466, 1201-1228.
14. NDLOVU, B., FARROKHPAY, S., BRADSHAW, D., 2013, The effect of phyllosilicate minerals on mineral processing industry. International Journal of Mineral Processing, 125, 149-156.
15. PASHLEY, R.M., QUIRK, J.P., 1984, The effect of cation valency on DLVO and hydration forces between macroscopic sheets of muscovite mica in relation to clay swelling. Colloids and Surfaces, 9, 1-17.
16. RAND, B., MELTON, I.E., 1977, Particle interactions in aqueous kaolinite suspensions. Journal of Colloid and Interface Science, 60, 308-320.
17. DE KRETSER, R., SCALES, P.J., BOGER, D.V., 1997, Improving clay-based tailings disposal: case study on coal tailings. Environmental and Energy Engineering, 43, 1894-1903.
18. SCHOTT, H., 1968, Deflocculation of Swelling Clays by Nonionic and Anionic Detergents. Journal of Colloid and Interface Science, 26, 133-139.
19. SCHUBERT, H., 2008, On the optimization of hydrodynamics in fine particle flotation. Minerals Engineering, 21, 930-936.
20. SILVA, I.A., SOUSA, F.K.A., MENEZES, R.R., NEVES, G.A., SANTANA, L.N.L., FERREIRA, H.C., 2014, Modification of bentonites with nonionic surfactants for use in organic-based drilling fluids. Applied Clay Science, 95, 371-377.
21. WANG, B., PENG, Y., 2013, The behaviour of mineral matter in fine coal flotation using saline water. Fuel, 109, 309-315.
22. XU, Z., LIU, J., CHOUNG, J.W., ZHOU, Z., 2003, Electrokinetic study of clay interactions with coal in flotation. International Journal of Mineral Processing, 68, 183-196.
23. ZHANG, Z., LIU, J., XU, Z., MA, L., 2013, Effects of clay and calcium ions on coal flotation. International Journal of Mining Science and Technology, 23, 689-692.
Copy url
Sign up for email alerts