Abstract
It is critical to separate dolomitic limestone impurities from apatite to utilize the South Florida Phosphate Rock deposits for fertilizer manufacturing. Conventional flotation scheme is not successful for separation of dolomite from its mixture with apatite. Several processing methods utilizing both anionic and cationic collectors have been proposed to solve this problem, but they have yet to be tested on a commercial scale.
Adsorption of the collectors such as dodecylamine and fatty acids is reported to be strongly influenced by electrical double layer forces. In this study, manipulation of the electrostatic forces by adding sodium chloride was attempted to achieve the desired separation. Suitable separation of apatite from dolomite was achieved with dodecylamine hydrochloride in the presence of sodium chloride. Zeta potential measurements revealed that sodium chloride acts as an indifferent electrolyte for dolomite, but causes a shift in the iso-electric point of apatite.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Johnston, DJ. and Leja, J., “Rotation Behavior of Calcium Phosphates and Carbonates in Orthophosphate Solution,” IMM Trans, Vol. 87, pp. C237-242, 1978.
Lawver, J.E., Bernardi, J.P., McKereghan, G.F., Raulerson, J.D., Lynch, D. and Hearon, R.S., “New techniques in Beneficiation of the Florida Phosphates of the Future,” Minerals and Metallurgical Processing, Vol. 1, No. 2, pp. 89–106, 1984.
Lawver, J.E., Raulerson, J.D. and Cook, C.C., “New Techniques in Beneficiation of Phosphate Rock,” Trans., SME/AIME, Vol. 268, pp. 1787–1801, 1980.
Lawver, J.E., Wiegel, R.L, Snow, R.E. and Hwang, C.L, “Beneficiation of Dolomitic Florida Phosphate Reserves,” XIV International Mineral Processing Congress, Toronto, Canada, 1982.
Lehr, J.R. and Hsieh, S.S., “Beneficiation of High Carbonate Phosphate Ores,” U.S. Patent 4,287,053, 1981.
Llewellyn, T.O., Davis, B.E. and Sullivan, G.E. “Beneficiation of Florida Dolomite Phosphate Ores,” Minerals and Metallurgical Processing, Vol. 1, No. 1, pp. 43–48, 1984.
Moudgil, B.M. and Chanchani, R., “Selective Flotation of Dolomite from Francolite Using Two-Stage Conditioning,” Minerals and Metallurgical Processing, Vol. 2, No. 1, pp. 19–25, 1985.
Moudgil, B.M. and Somasundaran, P., “Advances in Phosphate Flotation,” In: Advances in Mineral Processing, P. Somasundaran, Ed., SME/AIME Pub., Littleton, Colorado, pp. 426-441, 1986.
Snow, R.E., “Flotation of Phosphate Ores Containing Dolomite,” U.S. Patent No. 4,364,824.
Soto, H. and Iwasaki, I., “Flotation of Apatite from Calcareous Ores with Primary Amines,” Minerals and Metallurgical Processing, Vol. 2, pp. 160–166, 1985.
Moudgil, B.M., and Ince, D.E., “Method of Beneficiating Phosphate Ores,” U.S. Patents 4,814,069 and 4,857,174, 1989.
Ince, D.E., “Effect of Sodium Chloride on the Selective Flotation of Dolomite from Apatite”, Ph.D. Dissertation, University of Florida, Gainesville, FL, 1987.
Ananthapadmanabhan, K.P, “Association Interactions in Surfactant Solution and Their Role in Flotation,” Doctor of Engineering Science Dissertation, Columbia University, New York, NY, 1980.
Pugh, R.J., “The Role of the Solution Chemistry of Dodecylamine and Oleic Acid Collectors in the Flotation of Fluorite,” Colloids and Surfaces, Vol. 18 pp. 19–41, 1986.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1991 Springer Science+Business Media New York
About this chapter
Cite this chapter
Moudgil, B.M., Ince, D.E. (1991). Flotation Separation of Apatite From Dolomite Using Dodecylamine and Sodium Chloride. In: Sharma, M.K., Sharma, G.D. (eds) Particle Technology and Surface Phenomena in Minerals and Petroleum. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-0617-5_14
Download citation
DOI: https://doi.org/10.1007/978-1-4899-0617-5_14
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4899-0619-9
Online ISBN: 978-1-4899-0617-5
eBook Packages: Springer Book Archive