Recovery of Apatite From Ore Slimes Using Centrifugal Heavy Liquid Separation
- 13 Downloads
The aim of this study is to determine the feasibility of using a centrifugal heavy medium separation (CHMS) method to obtain apatite concentrates from ore slimes (particle size < 45 µm, 4.5% P2O5). The effects of the specific gravity, centrifugal speed, and time on the P2O5 content of the product and its recovery were investigated based on the Box–Behnken approach. X-ray fluorescence (XRF) spectroscopy, x-ray diffraction (XRD) analysis, and thermogravimetric (TG) analyses were performed to evaluate the properties of the product. The experimental findings indicate that each experimental parameter had a strong effect on the recovery of P2O5 from the ore slimes. The final product consisted mainly of hydroxyapatite along with aragonite, while its P2O5 content exceeded 30% P2O5, with recovery of 99.81%. The minor element ratio and CaO/P2O5 ratio were found to be 0.02 and 1.66, respectively. These values meet industrial requirements.
This study was supported by Çukurova University. The author would like to thank Dr. Turan Yılmaz for permitting use of laboratory centrifugal equipment in his laboratory and Dr. Fatih Karaoğlan for providing heavy medium liquid.
Funding was provided by Çukurova Üniversitesi (FBA-2019-10123).
- 1.European Commission, Study on the review of the list of Critical Raw Materials (Luxembourg: Publications Office of the European Union, 2017).Google Scholar
- 5.S.M. Bulatovic, Flotation of Phosphate Ore.Handbook of Flotation Reagents: Chemistry, Theory and Practice Flotation of Industrial Minerals, ed. S.M. Bulatovic (Amsterdam: Elsevier, 2015), pp. 1–19.Google Scholar
- 7.B. A. Wills and J. A. Finch, Chapter 11-Dense Medium Separation (DMS), Wills Mineral Processing Technology (Eighth Edition), 245–264; 2016, Boston, USA, Butterworth-Heinemann.Google Scholar
- 12.D. Schriner and C. Anderson, J. Metall. Eng. 4, 69 (2015).Google Scholar
- 13.B.A. Wills and J.A. Finch, Chapter 11-Dense Medium Separation (DMS), Wills’ Mineral Processing Technology (Eighth Edition) (Boston: Butterworth-Heinemann, 2016), pp. 245–264.Google Scholar
- 16.A.F. Taggart, Handbook of Mineral Dressing (New York: Wiley, 1945).Google Scholar
- 17.Webminerals, Web minerals, http://webmineral.com/. (accessed 31 December 2018).
- 19.E. Wingate and J. Kohmuench, An optimized approach to phosphate recovery, Beneficiation of Phosphates: Comprehensive Extraction, Technology Innovations, Advanced Reagents, Englewood, CO, USA, 2016, SME, 43.Google Scholar