Ahmed, M., Ibrahim, G., Elmowafy, A., Ahmed, H. (2008). OPTIMIZATION OF ALUMINA FLOTATION FROM GIBBSITE BEARING-SHALE OF SOUTH WESTERN SINAI, EGYPT BY USING SODIUM OLEATE AS A COLLECTOR. test, 36(No 2), 443-460. doi: 10.21608/jesaun.2008.116006
M. M. Ahmed; G. A. Ibrahim; A. A. Elmowafy; H. G. Ahmed. "OPTIMIZATION OF ALUMINA FLOTATION FROM GIBBSITE BEARING-SHALE OF SOUTH WESTERN SINAI, EGYPT BY USING SODIUM OLEATE AS A COLLECTOR". test, 36, No 2, 2008, 443-460. doi: 10.21608/jesaun.2008.116006
Ahmed, M., Ibrahim, G., Elmowafy, A., Ahmed, H. (2008). 'OPTIMIZATION OF ALUMINA FLOTATION FROM GIBBSITE BEARING-SHALE OF SOUTH WESTERN SINAI, EGYPT BY USING SODIUM OLEATE AS A COLLECTOR', test, 36(No 2), pp. 443-460. doi: 10.21608/jesaun.2008.116006
Ahmed, M., Ibrahim, G., Elmowafy, A., Ahmed, H. OPTIMIZATION OF ALUMINA FLOTATION FROM GIBBSITE BEARING-SHALE OF SOUTH WESTERN SINAI, EGYPT BY USING SODIUM OLEATE AS A COLLECTOR. test, 2008; 36(No 2): 443-460. doi: 10.21608/jesaun.2008.116006

OPTIMIZATION OF ALUMINA FLOTATION FROM GIBBSITE BEARING-SHALE OF SOUTH WESTERN SINAI, EGYPT BY USING SODIUM OLEATE AS A COLLECTOR

JES. Journal of Engineering Sciences
Article 11, Volume 36, No 2, March and April 2008, Pages 443-460    PDF (780.36 K)
Document Type: Research Paper
DOI: 10.21608/jesaun.2008.116006
Authors
M. M. Ahmed1; G. A. Ibrahim1; A. A. Elmowafy2; H. G. Ahmed2
1Mining and Metallurgical Engineering Department, Faculty of Engineering, Assiut University, Assiut 71516, Egypt
2Nuclear Materials Authority, Egypt
Abstract
The effect of sodium oleate on the flotation of alumina was studied using samples of gibbsite bearing–shale of south western Sinai, Egypt. The assays of the samples are 18.98% Al2O3, 15.45% SiO2, 12.83% Fe2O3, 14.87% CaO, 5.74% P2O5, 5.34% MnO, 0.86% K2O, 0.76% Na2O, 1.50% trace elements and 23.65% loss on ignition. The aim of this research is to upgrade alumina in the concentrate to be suitable for the industrial applications. Various operating variables (i. e. pH, pulp density, collector dosage, and particle size) affecting the flotation process of gibbsite were studied. Sodium oleate used as an anionic collector; as well as, sodium hydroxide was used as a pH modifier. The optimum conditions obtained were as follows: pH = 11, collector dosage = 2000 g/t, pulp density = 250 g/l and particle size = (-100+80) µm. At these conditions, a concentrate having a grade of 40.1% alumina with component recovery of 96.1% was obtained. The grades of the other ore constituents in final concentrate were as follows: SiO2 was decreased from 14.2% to 5.9%, CaO was decreased from 14.1% to 4.8%, Fe2O3 was decreased from 13.1% to 5.4%, P2O5 was decreased from 4.3% to 3.2%, MnO was decreased from 4.2% to 3.5%, while K2O was increased from 0.89% to 1.3%, Na2O was also increased from 0.69% to 1.2%, traces were increased from 1.6% to 2.7%, and loss on ignition was increased from 25.4% to 31.9%. The component recoveries of SiO2, CaO, Fe2O3, P2O5, MnO, K2O, Na2O, and traces of the final concentrate were 21.4%, 17.5%, 21.2%, 38.4%, 42.9%, 75.3%, 89.6%, and 86.9%, respectively. The mass recovery of final concentrate was 51.5%.
Keywords
Gibbsite; alumina flotation; collectors; isoelectric point; pH; pulp density; particle size
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