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Minerals 2016, 6(3), 93; doi:10.3390/min6030093

The Effect of Ca2+ and Mg2+ on the Dispersion and Flocculation Behaviors of Muscovite Particles

1
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
2
College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
3
Hubei Provincial Engineering Technology Research Center of High Efficient Cleaning Utilization for Shale Vanadium Resource, Wuhan 430081, China
*
Author to whom correspondence should be addressed.
Academic Editor: Athanasios Godelitsas
Received: 20 May 2016 / Revised: 29 August 2016 / Accepted: 31 August 2016 / Published: 8 September 2016
(This article belongs to the Special Issue Mineral Surface Science and Nanogeoscience)
View Full-Text   |   Download PDF [1994 KB, uploaded 8 September 2016]   |  

Abstract

The dispersion and flocculation behavior of muscovite suspensions in the presence of Ca2+ and Mg2+ are relevant for industrial processing of pre-concentrated muscovite from stone coal, a primary source of vanadium. In this study, the dispersion and flocculation behavior were investigated by means of sedimentation, zeta potential, and ion absorption experiments, as well as the force between particles and ion speciation calculations. The results indicated that the dispersion and flocculation behavior of muscovite particles without excess ions were in qualitative agreement with the classical DLVO theory. The muscovite particles aggregated mainly due to basal surface-edge interactions in acidic suspensions but were dispersed in alkaline suspension by electrostatic repulsion of the total particle surface. In acidic suspensions, the ability of muscovite to form dispersions of muscovite was increased with the decrease in the electrostatic attraction between the basal surface and the edge caused by the compression of the electric double layers withCa2+ and Mg2+. In alkaline suspension, the main adsorption form of Ca2+ and Mg2+ on muscovite surface was the ion-hydroxy complexes. The flocculation behavior of muscovite was affected by the static bridge effect of the ion-hydroxy complexes. View Full-Text
Keywords: muscovite; calcium and magnesium ions; zeta potential; DLVO; dispersion and flocculation muscovite; calcium and magnesium ions; zeta potential; DLVO; dispersion and flocculation
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Tang, J.; Zhang, Y.; Bao, S. The Effect of Ca2+ and Mg2+ on the Dispersion and Flocculation Behaviors of Muscovite Particles. Minerals 2016, 6, 93.

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