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A STUDY ON SHEAR FLOCCULATION OF MAGNESITE SUSPENSIONS
Abstract
Shear flocculation characteristics of magnesite with sodium oleate as anionic surfactant have been investigated in this study. The effects of various parameters such as pH, stirring speed and concentration of sodium oleate on the shear flocculation of magnesite were determined. It was found that the shear flocculation of magnesite was not affected much by the pH changes of the suspension. However, the flocculation of magnesite showed strong dependences on stirring speed and surfactant concentration. By evaluation of the experimental results, optimum conditions for shear flocculation of magnesite were determined as: pH, alkaline levels; sodium oleate concentration, 20 mg/dm3 and stirring speed, 500 rpm. Under these optimum conditions, magnesite fines in the suspension could be flocculated with a recovery of 84\%.
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References9
Healy TW. Beneficiation of mineral fines, NSF Workshop Report, AIME, 161. 1979;
Michaels A. S. Aggregation of suspensions by polyelectrolytes, Industrial and Engineering Chemistry, vol. 46, 1954;
Gregory J. Rates of fiocculation of latex particles by cationic polymer, Journal of Colloid and Interface Science, vol. 42, 1973;
Kitchener J. A. Principles of action of polymeric flocculants, British Polymer Journal, vol. 4, 1972;
Hogg R. Process design for fiocculation, clarification and thickening of fine-particle suspensions, 1 8* International Mineral Processing Congress, Sydney, vol. 5, 1993;
Sadowski Z., The influence of the sodium oleate adsorption on the behaviour of calcite suspensions, Chemical Engineering Science, vol. 48, 1993;
Gence N. & Ozdag H. Surface properties of magnesite and surfactant adsorption mechanism, International Journal of Mineral Processing, vol. 43, 1995;
Ansen K., Ekmekçi Z. & Demirel, H. Effects of multivalent cations on the electrokinetic behaviour of magnesite, 5* International Mineral Processing Symposium, 1994;
Klimpel R.R Introduction to solid-solid separation of fine particles froth flotation, ERC Particle Science and Technology, Florida. 1998;
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