Model for Quantitative Analysis of Phosphorus Removed during Leaching of Iron Oxide Ore in Oxalic Acid Solution

C. I. Nwoye, C. N. Mbah, C. C. Nwakwuo, A. I. Ogbonna

Department of Material Science, Oxford University, United Kingdom..
Department of Materials and Metallurgical Engineering, Federal University of Technology,P. M. B 1526, Owerri, Imo State, Nigeria..
Department of Materials and Metallurgical Engineering. Enugu State University of Science and Technology, P. M. B 01660, Enugu State, Nigeria..

DOI: 10.4236/jmmce.2010.94024                

Abstract

Model for quantitative analysis of the concentration of phosphorus removed (relative to the final pH of the leaching solution) during leaching of iron oxide ore in oxalic acid solution has been derived. It was observed that the validity of the model is rooted in the expression lnP = (γ +Nlnγ) where P is the concentration of phosphorus removed during the leaching process, N is 0.57;dissolution coefficient of phosphorus in oxalic acid solution, and γ is the final pH of the leaching solution at the time t, when the concentration of phosphorus is evaluated, and both sides of the expression are correspondingly approximately equal. The model; P = e ^{(γ + 0.57 lnγ)}depends on the value of the final pH of the leaching solution which varies with leaching time. The maximum deviation of the model-predicted concentration of removed phosphorus from the corresponding concentration obtained from the experiment was less than 22%. The concentrations of phosphorus removed per unit mass of iron oxide ore added as obtained from experiment and derived model are 3.8329 and 4.0614 mg/kg/g respectively which are in proximate agreement.

Keywords

Model, Quantitative Analysis, Phosphorus Removed, Oxalic Acid, Iron Oxide Ore, Leaching.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Turkdogan, E.T., Pearson, J. (1953) J. Iron and Steel Inst., 221, pp. 393-401.
[2]	Decker, A., Sevrin, R., Scimar, R. (1962) Open Hearth Proceedings, 45, pp. 421- 456.
[3]	Duke, D. A., Ramstad, H. F., Meyer, H. W. (1962) Open Hearth Proceedings, vol 45, pp.81-98.
[4]	Kootz,T., Neuhaus, H. (1961) Stahl u. Eisen, 81, pp. 1810-1815.
[5]	Kootz, K., Behrens,K., Maas, H., Baumgarten,. P. (1965) Stahl u. Eisen, 85, pp 857-865.
[6]	Edneral, F. P. (1979) Electrometallurgy of Steel and Ferro-alloys, MIR Publisher,5th edition Moscow. pp 30-239.
[7]	Zea,Y. K. (1945) J. Iron and Steel Inst., 151, pp. 459-504.
[8]	Nwoye, C. I. (2008) Model for predicting the Time of Dissolution of Pre-quantified Concentration of Phosphorus during Leaching of Iron Oxide Ore in Oxalic Acid. Inter. J. Nat. Appl. Sc., 4(3):168-174.
[9]	Nwoye, C. I. (2006) SynchroWell Research Work Report, DFM Unit, No 2561178, 66-83.
[10]	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): 292-298.
[11]	Nwoye, C. I. (2009) Model for Evaluation of the Concentration of Dissolved Phosphorus during Leaching of Iron Oxide Ore in Oxalic Acid Solution. JMMCE,8(3):181-188
[12]	Nwoye, C. I. (2009) Model for Predicting the Concentration of Phosphorus Removed during Leaching of Iron Oxide Ore in Oxalic Acid Solution. J. Eng. & Appl. Sc. (in press)
[13]	Nwoye, C. I. and Ndlu, S. (2009) Model for Predictive Analysis of the Concentration of Phosphorus Removed during Leaching of Iron Oxide Ore in Sulphuric Acid Solution JMMCE, 8(4):261-270.
[14]	Anyakwo, C. N., and Obot, O.W. (2008) Phosphorus Removal from Nigeria`s Agbaja Iron Ore by Aspergillus niger, IREJEST 5(1), 54-58.
[15]	Nwoye, C. I. (2003) SynchroWell Research Work Report, DFM Unit, No 2031196, 26-60.