ABSTRACT Model for predictive analysis of the concentration of phosphorus removed (relative to the initial
and final pH of the leaching solution) during leaching of iron oxide ore in sulphuric acid
solution has been derived. It was observed that the validity of the model is rooted in the
mathematical expression; (P/N)1/3 = (er/a) where both sides of the relationship are almost equal. The model; P = 4.25(er/a)3 shows that the concentration of phosphorus removed is dependent on the values of the initial and final pH of the leaching solution. In all, the positive or negative deviation of the model-predicted phosphorus concentration from its corresponding value obtained from the experiment was found to be less than 29%, which is quite within the acceptable deviation limit of experimental results hence establishing the validity and precision of the model in its application for predicting quantitatively the concentration of phosphorus removed during the leaching process.
Cite this paper
C. Nwoye and S. Ndlu, "Model for Predictive Analysis of the Concentration of Phosphorus Removed during Leaching of Iron Oxide Ore in Sulphuric Acid Solution," Journal of Minerals and Materials Characterization and Engineering, Vol. 8 No. 4, 2009, pp. 261-270. doi: 10.4236/jmmce.2009.84023.
 Lee, S. O., Oh, J. K., Shin, B. S., 1999, Dissolution of Iron Rust Materials using Oxalic Acid. J. Min. Metall. Inst. Jpn., Vol. 115, pp. 815-819.
Taxiarchour, M., Panias, D., Doumi, I., Paspaliaris, I., Kontopoulos, A., (1997a) Removal of Iron from Silica Sand by Leaching with Oxalic Acid, Hydrometallurgy, 46, 215-227.
Lee, S.O, Tran, T., Park Y.Y., Kim S.J., and Kim, M. J. (2006) Study on the Kinetics of Iron Leaching by Oxalic Acid.Int. J .Miner Process, 80, 144-152.
Taxiarchou, M., Parnias, D., Doumi, I., Paspaliaris, I., and Kontopoulous, A. (1997b) Dissolution of Haematite in Acidic Oxalate Solutions. Hydrometallurgy, 44, 287-299.
Panias, D., Taxiarchou, M., Paspaliaris, I., Kontopoulos, A. (1996) Mechanism of Dissolution of Iron Oxides in Aqueous Oxalic Acid. Hydrometallurgy, 42, 257-265.
Nwoye, C. I. (2008) Model for Quantitative Analysis of Dissolved Iron in Oxalic Acid Solution during Leaching of Iron Oxide Ore, Inter. Res. J. Eng. Sc. Tech., 5(1): 37-41.
Nwoye, C. I., Amara, G. N., and Onyemaobi, O. O. (2008) Model for Evaluating Dissolved Iron during Leaching of Iron Oxide Ore in Sulphuric Acid Solution, Inter. J. Nat. Appl. Sc., 4(2):209-211.
Pinches, A. (1975) Bacterial Leaching of an Arsenic Bearing Sulphide Concentrate. The Institute of Mining and Metallurgy, England, 34.
Nwoye, C. I. (2008) Ph.D Thesis, Metallurgical and Materials Engineering Department, Federal University of Technology,Owerri,178.
Turkdogan, E.T., and Pearson, J., (1953) J. Iron and Steel Inst., 221, pp.393-401.
Decker, A., Sevrin, R., and Scimar, R., (1962) Open Hearth Proceedings, 45, pp. 421- 456.
Duke, D.A., Ramstad, H. F. and Meyer, H. W (1962) Open Hearth Proceedings, 45, pp.81-98.
Kootz,T., and Neuhaus, H., (1961) Stahl u. Eisen, 81, pp. 1810-1815.
Kootz, K., Behrens, K., Maas, H., and Baumgarten, P. (1965) Stahl u. Eisen , 85, pp 857-865.
Edneral, F. P., (1979) Electrometallurgy of Steel and Ferro- alloys, MIR Publisher, 5th edition Moscow. pp 30-239.
Zea,Y.K. (1945) J. Iron and Steel Inst., 151, pp. 459-504.
Nwoye, C. I., Agu, P.C., Mark, U., Ikele, U.S., Mbuka, I. E., and Anyakwo, C. N. (2008) Model for Predicting Phosphorus Removal in Relation to Weight of Iron Oxide Ore and pH during Leaching with Oxalic Acid Inter. J. Nat. Appl. Sc., 4(3): 106-112.
Nwoye, C. I. (2008) SynchroWell Research Work Report, DFM Unit, No 2000116, 36-50.