Assessment Of Beneficiation Routes Of Tantalite Ores From Key Locations In Nigeria
- 1 Metallurgical and Materials Engineering Department, Obafemi Awolowo University, Ile-Ife
- 2 Centre for Energy Research and Development, Obafemi Awolowo University, Ile-Ife
- 3 Centre for Energy Research and Training, Ahmadu Bello University, Zaria
- 4 Metallurgical and Materials Engineering Department, Obafemi Awolowo University, Ile-Ife
- 5 Metallurgical and Materials Engineering Department, Obafemi Awolowo University, Ile-Ife
- 6 Metallurgical and Materials Engineering Department, Obafemi Awolowo University, Ile-Ife
Abstract
The beneficiation methods for some tantalite ores from selected deposits in Nigeria have been assessed through mineralogical and compositional analyses of the ores. Tantalite ores obtained from eight different well-known locations of the mineral in the country were analyzed with 109Cd excitation source Energy Dispersive X-ray spectrometry using the emission-transmission method of quantification. The major minerals detected and quantified include TiO 2 , MnO, Fe 2 O 3 , Ta 2 O 5 , Nb 2 O 5 , WO 3 , Th and U. Impurity elements such as Hf, Zn, Zr, Co, Pb, Rb, and Y were also observed and evaluated. Our analyses further show that Ta2O5 in the ores ranged from a minimum concentration of about 8% in Otu to about 60% in the Egbe deposits, while the Nb 2 O 5 concentrations in the ores ranged from about 20% to 37.5% with the highest coming from the Ofiki deposit. Based on these results and the work of other authors, we deduced that clean-up operations might be adequate for Ta extraction from most of the tantalite deposits in Nigeria. The consideration of simplicity and cost of process favours the direct dissolution of the ores in HF for the clean-up operations.
- Aliyu, A.; 1996; Potentials of the Solid Minerals Industry in Nigeria; Raw Materials Research and Development Council, Abuja, Nigeria.
- Miller, G. L.; 1959; Tantalum and Niobium; Butterworths Scientific Publications, London; p12.
- Kock, W. and Paschen, P.; 1989; “Tantalum – Processing, Properties and Applications”; JOM 10, pp33-39.
- Okunlola, O. A.; 1999; “Specialty Metal Potentials of Nigeria”; Proceedings of the First Mining in Nigeria Conference and Workshop; pp67-90.
- Saint Simon de, P.; 1999; “Specialty Metals in Nigeria: Potential for World Class Deposit; Second “Mining in Nigeria” Conference, Abuja, Nigeria; p15.
- Ministry of Solid Minerals Development; 2003; “Tantalite and the Rare Earth Metals”.
- Cunningham, L. D.; 2005; “Tantalum”; USGS Mineral commodity Summaries; pp166-167.
- Burt, R. O.; 1984; “Gravity Concentration Technology”; Elsevier Science BV, Amsterdam, p607.
- Wills, B. A.: 1992; “Mineral Processing Technology”, 5th Ed.; Pergamon Press, p408.
- Burt, R.; 1996; “Beneficiation of Tantalum Ore – How it is Achieved and Could it be Better?”; Proceedings of 125th TMS Annual Meeting and Exhibition; Anaheim, CA. 17-22
- Funtua, I. I.; 1999a; “Analysis of Nb-Ta ores by Energy Dispersive X-ray Fluorescence Spectrometry”. J. Trace Microprobe Techniques, 17, 2 (1999a), pp89-195.
- Obiajunwa, E. I.; 2001; “Analysis of some Nigerian solid mineral ores by energydispersive X-ray fluorescence spectroscopy”. Nuclear Instruments and Methods in Physics Research B, 184, pp437-430.
- Markowicz, A. A; and Van Grieken, R. E.; 1993; “Quantification in XRF analysis of intermediate thickness samples”. In: Van Grieken and Markowicz (eds) Handbook of X-Ray Spectroscopy, Marcel Dekler Inc., New York, 339-358.
- Bernasconi, G. B; Bamford, S. A; Dosan, B; Haselberger, N; Markowicz, A; Mahmoud, A; and Valcovic, V.; 1996; “Applicability of annular source excited systems in quantitative XRF analysis”; X-ray Spectrom. 23, pp65-70.
- Leroux, J; and Mahmoud, M.; 1996; “X-ray quantitative analysis by an emissiontransmission method”; Anal. Chem., 38, pp76-82.
- Giauque, R. D; Garrett, R. B; and Goda, L. Y.; 1979; “Determination of trace elements in light element matrices by X-ray fluorescence with incoherent scattered radiation as an internal standard”; Anal. Chem. 51, pp512-516