Flotation and leaching studies on processing phosphate ore from El-Sebaiya East, Egypt

CIM Journal, Vol. 5, No. 4, 2014
Abstract The composition of phosphate rocks, mainly used in manufacturing fertilizers, varies among deposits; therefore, phosphate rocks from different sources are expected to behave differently in acidulation processes. This paper examines the effect of preconcentration of phosphate ore from El- Sebaiya East, Egypt, using flotation on uranium leaching. A high-grade ore sample (27.3% P2O5, 168 mg/kg U) supplied by the Al-Nasr Mining Company, was subjected to reverse single-stage flotation to separate carbonate from the phosphate sample. Subsequently, P2O5 and U concentrations were 32.2% (92.1% recovery) and 225 mg/kg, respectively. After the leach process, the U concentration in the liquor was 319 mg/L.
Keywords: Calcareous-siliceous phosphate, Carbonate flotation, Phosphate depression, Upgrading, Uranium leaching
Résumé La composition des roches phosphatiques, utilisées surtout dans la manufacture de fertilisants, varie selon les gisements; les roches phosphatiques provenant de différentes sources auraient donc des comportements différents dans le procédé d’acidulation. Le présent article examine l’effet sur la lixiviation de l’uranium de l’utilisation de la flottation sur un minerai préconcentré de phosphate provenant de l’est d’El-Sebaiya, en Égypte. Un échantillon de minerai à teneur élevée (27,3 % P2O5, 168 mg/kg U), fourni par la compagnie minière Al-Nasr, a été soumis à une flottation inverse à étape unique pour séparer le carbonate du phosphate. Par la suite, les concentrations de P2O5 et de U étaient respectivement de 32,2 % (récupération de 92,1 %) et de 225 mg/kg. Après le procédé de lixiviation, la concentration en U dans la liqueur était de 319 mg/l.
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