Upgrading of Ahu-Tartur Phosphate Ore PDF

Keywords

phosphate, Egypt, ore

Abstract

Aiming to increase P2O5%, to decrease Fe2O3, MgO, and to remove the impurities such as pyrite, sulphates, carbonates. organic mailer and clay material from Abu-Tartur phosphate ores, a series of calcination and notation experiments for the deslimed ground and subjected to attrition ore was made. Two variants were tried to treat the ore. 1. The first variant: The ore was treated by crushing and screening to be divided into three parts: a) Part one contains the large fraction (+2mm) and was neglected. b) Part two contains the medium fraction (-2 + 0.2 mm) and was wet subjected to allrition. deslimed by hydrocyclone to eliminate sizes -0.08 mm , and then was calcined at 900°C for 30 min, before quenching. c) Part three contains the fine fraction (-0.2 mm) and was deslimed by the hydrocyclone (to eliminate size -0.08 mm) calcined and quenched under the same previous conditions. 2. The second variant: The same steps such as variant 1 were applied with respect to parts a & b the only difference is that part c in this variant was treated by notation instead of calcination. The concentrate obtained from the first variant represented 58.96% of the ore. in which P2O5 =32.41 % and MgO= 0.94%, while the concentrate of variant 2 represented 58.64% of the ore, and contains 32.32% P2O5 and 0.42% MgO. The rate of water consumption per ton treated ore was calculated for the two variants. It was found to be 1.2, and 1.0 cubic meters respectively. The two size fractions +2 & -0.08 mm represented 8.06% & 10.33% of the ore by weight respectively and are relatively low grade with respect to P2O5 (20% ) & high MgO content (2.8%) and are considered as tail to be rejected.