Surface forces in the processes of aggregation and flotation of particles

• Published in: Russian journal of non-ferrous metals Vol. 50; no. 3; pp. 193 - 198
• Main Authors: Evdokimov, S. I., Pan’shin, A. M.
• Format: Journal Article
• Language: English
• Published: Heidelberg Allerton Press, Inc 01.06.2009; Springer Nature B.V
• Subjects: Agglomeration; Attraction; Chemistry and Materials Science; Density; Dipoles; Materials Science; Metallic Materials; Mineral Processing of Non-Ferrous Metals; Nonferrous metals; Orientation; Sediments; Temperature dependence; volume; interaction force; hydrophobic-hydrophilic interactions; flotation; settling
• ISSN: 1067-8212; 1934-970X
• DOI: 10.3103/S1067821209030018

The temperature dependence of the volume of sediment formed on a porous partition under the kinetic destruction of the suspension is revealed. It is established that, if the temperature increases, the hydrophilic particles form small-volume denser sediments due to a weakening of the forces in the contacts between the particles; hydrophobic particles form large-volume skeleton sediments by virtue of an increase in the abovementioned forces. It is assumed that the increase in the forces of hydrophilic attraction with temperature can be associated with the surface forces of a structural origin, namely, with an increase in water density and normal orientation of dipoles in the case of forces of hydrophilic repulsion, as well as with a decrease in density and tangential orientation of dipoles for the forces of hydrophobic attraction.