Abstract
The technical viability for utilizing Jebel Kurun phosphate reserve in Sudan for the production of a fertilizer grade phosphoric acid is assessed. Statistical analysis has been carried for 56 samples. Phosphate rock has been classified into three main types and then the number of samples representing each type has been identified. Average values for phosphorus pentoxide is 19% and for uranium is 81.47 ppm. The most abundant elements are silicon, aluminum, phosphorus, calcium and iron. Aluminophosphate ore (CaO% ≤ 12%, Al2O3% ≥ 20%, P2O5% ≥ 18%) is represented by 55.36% of sampled phosphate rock. This type can be used to produce phosphoric acid when P2O5 > 30%. Apatite rock including aluminophosphate CaO% ≥ 25%, Al2O3% ≤ 10%, P2O5% ≥ 20%, 12% ≤ SiO2 ≤ 35% is represented by 1.79% of sampled phosphate rock, this type can be used to produce phosphoric acid when it can meet the requirements of (CaO% ≥ 30%, Al2O3% ≤ 7%, P2O5% ≥ 25%, SiO2% ≤ 30%). Silica ore including phosphorus (SiO2% ≥ 40%, P2O5% ≤ 10%) is represented by 16.07% of sampled phosphate rock and Iron ore including phosphorus (Fe2O3% ≥ 20%, P2O5% ≤ 10%) is represented by 5.36% of samples. Both types cannot be used to produce phosphoric acid. The statistical distribution of P2O5 in the size fractions for a core drilled samples is required.
Highlights
Giad Industrial Group in Sudan, studied the analysis report with a conventional technology supplier and classified Kurun mining area phosphate rock into three main types (Table 9) as follows: 1) The first type: Phosphate rock including Lucinite or aluminophosphate ore o Main component content: CaO% ≤ 12%, Al2O3% ≥ 20%, P2O5% ≥ 18% 2) The second type: Apatite rock including aluminophosphate o Main component content: CaO% ≥ 25%, Al2O3% ≤ 10%, P2O5% ≥ 20%, 12% ≤ SiO2 ≤ 35%
The statistical analysis results (Table 4 & Figure 6) shows the estimated phosphorus pentoxide ratio P2O5% in Jebel Kurun area has an average value of 19%, and ranges from 0.13% to 32.94% with a standard deviation of 9.05
Uranium in Jebel Kurun area has an average value of 81.47 ppm (Table 7 & Figure 10) and ranges from 1.2 ppm to 208.3 ppm and a standard deviation of 53.89, a very weak positive correlation coefficient (0.16) (Table 7, Table 8 & Figure 11) with phosphorus pentoxide
Summary
M. Wagialla deposits discovered in 1983 during exploration work by geologists of the German Geological Group in the neighborhood of Jebel Kurun (Figure 1) on the eastern border of the Nuba Mountains [1], at a distance of 690 kilometer from Khartoum and 1510 kilometer from Port Sudan
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