T.S. Antonenko, PHASE TRANSFORMATION OF HEMATITE TO MAGNETITE UNDER MICROWAVE TREATMENT
UDC (549.5.517.2+549.731.13) : 539.26
PHASE TRANSFORMATION OF HEMATITE TO MAGNETITE UNDER MICROWAVE TREATMENT
T.S. Antonenko, PhD (Geology), Research Fellow
E-mail: email@example.com; orcid: 0000-0002-0583-3541
A.B. Brik, DrSc (Mathematics-Physics), Prof.,
Corresp. Member of NAS of Ukraine, Head of Department
O.Yu. Tsymbal, PhD student
E-mail: firstname.lastname@example.org; orcid: 0000-0002-8800-9899
N.O. Dudchenko, DrSc (Geology), Leading Researcher
E-mail: email@example.com; orcid: 0000-0002-4850-9557
V.V. Ovsienko, Junior Researcher
E-mail: firstname.lastname@example.org; orcid: 0000-0002-4645-2948
Yu.I. Cherevko, Leading Engineer
E-mail: email@example.com; orcid: 0000-0003-2319-6766
M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of NAS of Ukraine
34, Acad. Palladin Ave., Kyiv, Ukraine, 03142
Mineralogical journal 2021, 43 (4): 11-17
Abstract: Phase transformations of natural and synthetic hematite in aqueous Fe (II)-containing medium under the influence of microwave radiation at a temperature range from room temperature to 260°С and pressure of 6 MPa were investigated. The saturation magnetization of all initial samples was less than 1 A∙m2/kg, while the saturation magnetization of the samples after phase transformations increases significantly (i.e., up to 27 A·m2/kg). It was shown by X-ray diffraction that all samples were transformed into magnetite. Thermomagnetic curves were measured for the treated samples and Curie temperatures were determined. Curie temperatures of the samples of natural hematite were determined as 560 °C and for synthetic hematite as 559°C that are close to the Curie temperature of pure magnetite (580°C). The relatively high saturation magnetization of obtained magnetic particles makes them promising for different applications (adsorbents of radioactive waste, carriers for magnetic drug targeting, etc.). The results of this investigation could also be useful for developing new technologies for production of iron ore concentrates from the hematite-containing waste of mining and processing plants.
Keywords: hematite, magnetite, phase transformation, Fe (II)-containing solution, X-ray diffraction, magnetometry, thermomagnetic analysis.
- Cornell, R.M. and Schwertmann, U. (2003), The iron oxides: structure, properties, reactions, occurrences and uses, Weinheim, Wiley-VCH GmbH & Co, KGaA. https://doi.org/10.1002/3527602097
- Gerasimets, I., Petrenko, O., Savchenko, T., Kardanets, J., Grechanovsky, A. and Dudchenko, N. (2014), Visnyk Taras Shevchenko Nat. Univ. of Kyiv. Geology, Vol. 64, No. 1, Kyiv, UA, pp. 21-25 (p. 22). https://doi.org/10.17721/1728-2713.64.04.21-25
- Holland, H. and Yamaura, M. (2009), Seventh Int. Latin American Conf. on Powder Technology, Novem. 8 to 10, 2009, Atibaia, SP, Brazil, p. 434.
- (1998) JCPDS International Centre for Diffraction Data, Diffraction Data Cards and Alphabetical and Grouped Numerical Index of X-ray Diffraction Data, 1998.
- Junaidi, M., Ken Ninez, N.P., Pramusiwi, S., Ismail, I. and Sungging, P. (2014), IJEEDC Int. Journ., Vol. 2, Iss. 1, pp. 43-46 (p. 45).
- Laurent, S., Forge, D., Port, M., Roch, A., Robic, C., Elst, L.V. and Muller, R.N. (2008), Chem. Rev., Vol. 108(6), pp. 2064-2110 (p. 2064). https://doi.org/10.1021/cr068445e
- Ling, H. (2011), J. Sol.-Gel. Sci. Technol., Vol. 60, Article number: 198. https://doi.org/10.1007/s10971-011-2579-4
- Lopez, J.A., Gonzales, F., Bonilla, F.A., Zambrano, G. and Gomes, M.E. (2010), Rev. Latin Am. Metal. Mater., Vol. 30, No. 1, pp. 60-66.
- Massart, R. (1981), IEEE Transactions on Magnetics, Vol. 17, No. 2, pp. 1247-1248. https://doi.org/10.1109/TMAG.1981.1061188
- Matthews, A. (1976), Amer. Mineral., Vol. 61, pp. 927-932 (p. 927).
- Omran, M., Fabritius, T., Elmahdy, A.M., Abdel-Khalek, N.A., El-Aref, M. and Elmanawi, A.E.-H. (2014), Separation and Purification Technology, Vol. 136, pp. 223-232 (p. 224). https://doi.org/10.1016/j.seppur.2014.09.011
- Yong Jae Suh, Myung Eun Ju, Dae Sup Kil and Hee Dong Jang (2011), Method for preparing magnetite nanoparticles from low-grade iron ore and magnetite nanoparticles prepared be the same, Korea/USA Patent, Appl. 8337805 B1, 2011.