Determination of the Conditions for Agglomeration of Molybdenite Fines in the Presence of Kerosene Emulsion Through the Extended DVLO Theory

##plugins.themes.bootstrap3.article.main##

  •   Antonio López Mendoza

  •   Alicia Elizabeth Chàvez Guajardo

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.


Keywords: Extended DVLO theory, Fine particles Molybdenite; Hydrophobic agglomeration, Querosene emulsion

References

S. Chander., D.W. Fuerstenau., On the natural flotability of molybdenite, Trans.Am. Inst. Min. Metall. Eng. 252(1972), 62–69.

N. Arbiter., Problems in sulfide ore processing, in: P. Somasundaran, N. Arbiter (Eds.), Beneficiation of Mineral Fines Problem and Research Needs, AIME, Ann Arbor, (1979) pp. 139–152.

D.W. Fuerstenau. S. Chander., A. M. Abouzeid, The recovery of fine particles by physical separation methods, in: P. Somasundaran, N. Arbiter (Eds.) Beneficiation of Mineral Fines Problems and Research Needs, AIME, Ann Arbor, 1979, pp. 3–59.

R. D. Coleman., B. D. Sparks., A. Majid, F.N. Toll, Agglomeration-flotation: recovery of hydrophobic components from oil sands fine tailings, Fuel 74 (1995), 1156–1161.

T.L. Koh P., L. J. Warren, flotation of flocs of ultrafine scheelite, Trans. IMM Sect. C 86(1977) - C94–C95.

S. Song, A. Lopez V., J. I. Reyes, B., C. Lara. V., Flocflotation of galena and sphalerite fines, Min. Eng. 14(2001), 87–98.

S. Song, O. Trass., Floc-flotation of the Prince coal with simultaneous grinding and hydrophobic flocculation in a szego mill, Fuel 76 (1977), 839–844.

S. Song., S. Lu., Hydrophobic flocculation of fine hematite, siderite, and rhodochrositte particles in aqueous solution, J. Coll oid Interfacial. Sci. 166 (1994), 35–42.

Y. Cebeci., Investigation of kinetics of agglomerate growth in oil agglomeration process, Fuel 82 (2003), 1645–1651.

S. Duzyola., A. Ozkan., Role of hydrophobicity and surface tension on shear flocculation and oil agglomeration of magnesite, Sep. Purif. Technol. 72(2010) ,7–12.

S. Duzyola., A. Ozkan., Correlation of flocculation and agglomeration of dolomite with its wettability, Sep. Sci. Technol. 46, 876–881.Elsevier, New York (2011). p. 216.

S. Song., A. Lopez-V., J.L. Reyes-B., H. I. Bermejo-Perez, Hydrophobic flocculation of sphalerite fines in aqueous solution induced by ethyl and amyl xanthates, Colloids Surf. A 181(2001)., 159–169.

L. Warren., Shear flocculation, in: J.S. Laskowski, J. Ralston (Eds.), Colloid Chemistry in Mineral Processing, Elsevier, Amsterdam (1992), pp.309–329.

S. Song, X. Zhang., B. Yang., A. Lopez M., Flotation of molybdenite fines as hydrophobic agglomerates., Separation and Purification Technology., 98 (2012) 451–455.

B.V. Derjaguin., L. Landau., Theory of the stability of strongly charged lyophobic sols and of the adhesion of strongly charged particles in solutions ofelectrolytes. (1941), Acta Phys. Chim. 14, 633.

E. J. Verwey. W., J. T. Overbeek. G., Theory of the Stability of Lyophobic Colloids (1948).

C.P. Hiemenz, C.P., R. Rajagopalan., Principles of Colloid and Surface Chemistry, Third Edition, Marcel Dekker Inc., New York (1997), pp. 499-527.

P. Gast A., W. Adamson. A., Physical Chemistry of Surfaces, Wiley & Sons,6ª ed (1997), USA.

J. Gregory., Interaction of unequal double layers at constant charge., Journal of Colloid and Interface Sci. vol.51, issue 1 (1975), 44-51.

Y.I. Robinovich., and B.V. Derjaguin., Colloid Surf (1988), 30,243.

S. Song., A. Lopez V., Computational studies on Interaction between air bubbles and Hydrophobic Mineral Particles Covered by Nonpolar Oil., Journal of Colloid and Interface Science 212 (1999), 42-48.

S. Song, S., Lu, S., “Theory and applications of hydrophobic flocculation technology”, XIX International Mineral Processing Congress (Ed. Massacci P.), Vol. C5, Proceedings of Elsevier Amsterdam (2000), pp.31-38.

Downloads

Download data is not yet available.

##plugins.themes.bootstrap3.article.details##

How to Cite
[1]
López Mendoza, A. and Chàvez Guajardo, A.E. 2021. Determination of the Conditions for Agglomeration of Molybdenite Fines in the Presence of Kerosene Emulsion Through the Extended DVLO Theory. European Journal of Engineering and Technology Research. 6, 1 (Jan. 2021), 80-86. DOI:https://doi.org/10.24018/ejers.2021.6.1.2328.