Abstract
The hydrophobic agglomeration of fine particles of molybdenite in the presence of kerosene emulsion, has been studied in this paper. The results obtained in the investigation as; zeta potential of kerosene emulsion(ζemulsion), zeta potential of the molybdenite sample (ζMoS2), hydrophobicity of molybdenite represented by the contact angle (θMoS2) varying the pH, were used to calculate the total potential energy through the extended DVLO theory. Diagram containing curves total potential energy vs. separation distance of the particles, indicate that increasing the pH, also increases the energy barrier to overcome to achieve agglomeration and viceversa, which translates to a high probability of agglomeration in the pH range 5 to 8, with greater effect as the pH is increased in the acidic region.
Highlights
Molybdenum (Mo) known as "Moly" is a metal that is gaining day by day, importance in the industrial world, because of their varied and growing applications
Forth flotation poorly responds to fine mineral particles, which is mainly due to the small mass of the particles and low probability of collision and adhesion of particles to air bubble, leading a low recovery of valuable minerals [2], [3]
It is accepted that flocflotation, in which mineral fines are floated as hydrophobic agglomerates, is an effective process to improve the beneficiation of valuable minerals in fine particle size [4][7]
Summary
Molybdenum (Mo) known as "Moly" is a metal that is gaining day by day, importance in the industrial world, because of their varied and growing applications. For the recovery of molybdenite, their surface properties and the chemical nature of its crystal structure advantage, since because of these characteristics is a natural hydrophobic mineral and this makes the flotation process responds. The structural characteristics of molybdenite, result in the surface of the particles of the mineral, two different surfaces which can be found as: sites created by the breakdown of type Van der Waals bonds, which are called faces, and other sites created by the breaking of bonds S-Mo edges called, as the size reduces, the edge / face ratio increased and the. The central axis of the floc-flotation process is the hydrophobic agglomeration of fine mineral particles in aqueous solutions, which arises as a result of hydrophobic interaction between particles [8]. The agglomerates were observed very compact [14]
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