Table of Contents
International Journal of Mineralogy
Volume 2014 (2014), Article ID 128246, 9 pages
http://dx.doi.org/10.1155/2014/128246
Research Article

Characterization and Beneficiation of an Egyptian Nepheline Syenite Ore

Department of Mining, Faculty of Engineering, Cairo University, Giza 12613, Egypt

Received 15 August 2013; Accepted 15 December 2013; Published 16 February 2014

Academic Editor: Makoto Arima

Copyright © 2014 Abdel-Zaher M. Abouzeid and Abdel-Tawab A. Negm. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Nepheline syenite ore is an essential constituent in ceramics and glass raw material meals, as a flux and as a source of alumina. The natural nepheline syenite rocks contain some undesired minerals, which are usually eliminated or reduced to the allowable limits by beneficiation. The present paper is concerned with characterization and beneficiation of an Egyptian nepheline syenite rock, at Abu Khruq locality, Eastern Desert, Egypt. The ore is exceptionally hard, with high crushing strength of 875 kg/cm2, and iron oxide content of about 6.5%. The grain size of the constituents is relatively large. In some samples, the iron oxides are disseminated within the feldspars and nepheline syenite crystals, or in cracks and fissures within the feldspars crystals. The rock contains some environmental hazardous elements such as uranium, thorium, and radon. Magnetic separation and flotation techniques were applied, separately or in combination. Under optimum operating conditions, magnetic separation followed by reverse anionic flotation gave a concentrate assaying 0.2% Fe2O3 and about 24% Al2O3 at alumina recovery of about 80%. The radioactive elements were reduced in the concentrate to lower levels than their levels in the original rock.