Feasibility study on preparation of magnesium titanate in carbonthermic reduction of vanadium titanomagnetite concentrates

• Autorzy: Chen Chao , Sun Ti-Chang , Kou Jue , Wang Xiao-Ping , Zhao Yong-Qiang

Identyfikatory

DOI

10.5277/ppmp18151

• Języki publikacji: EN

Abstrakty

EN

Effect of temperature and Mg:Ti ratio on phase composition and microstructure of reduced pellets was investigated to verify the feasibility of preparation of magnesium titanate by adding MgO in carbonthermic reduction of the vanadium titanomagnetite concentrates (VTC). Thermodynamic analysis results showed that magnesium titanate is more easily generated than FeTi2O5 or TiO2 by the reaction of FeTiO3 and MgO under the reductive atmosphere, which was confirmed by the discovery of magnesium titanate at roast experiment. It was found that the optimum conditions for reduction of VTC pellets were temperature of 1250 ºC and Mg:Ti ratio of 2, and the main phases of reduction product were metallic Fe and magnesium titanate (Mg2TiO4). However, trace iron impurities in Mg2TiO4 particles were found by energy-dispersive spectroscopy (EDS), so further purification is required.

Słowa kluczowe

EN

vanadium titanomagnetite; carbonthermic reduction; magnesium titanate; formation mechanism

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2019
• Tom: Vol. 55, iss. 2
• Strony: 417--425
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Chen Chao

• School of Civil and Resource, University of Science and Technology Beijing, Beijing, 100083 PR China

autor

Sun Ti-Chang

• School of Civil and Resource, University of Science and Technology Beijing, Beijing, 100083 PR China

autor

Kou Jue

• School of Civil and Resource, University of Science and Technology Beijing, Beijing, 100083 PR China

autor

Wang Xiao-Ping

• School of Civil and Resource, University of Science and Technology Beijing, Beijing, 100083 PR China

autor

Zhao Yong-Qiang

• School of Civil and Resource, University of Science and Technology Beijing, Beijing, 100083 PR China

Bibliografia

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• HUANG, Y., ZHOU, X.H., 2005. The synthesis of MgTiO3 by solid state reaction and characteristics with addition. J. Funct. Mater. 36, 689-691.
• LIU, S.S., GUO, Y.F., QIU, G.Z., JIANG, T., 2014. Solid-state reduction kinetics and mechanism of pre-oxidized vanadium−titanium magnetite concentrate. Trans. Nonferrous. Met. Soc. Chin. 10, 3372-3377.
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• OVCHAR, O.V., V'YUNOV, O.I., DURILIN, D.A., STUPIN, Y.D., BELOUS, A.G., 2004. Synthesis and microwave dielectric properties of MgO-TiO2-SiO2 ceramics. Inorg. Mater. 40, 1116-1121.
• PAUNOVA, R., 2002. Thermodynamic study of the reduction of titanium magnetite concentrate with solid carbon. Metall. Mater. Trans. B. 33, 633-638.
• SREEDJAR, K., PAVASKAR, N.R., 2002. Synthesis of MgTiO3 and Mg4Nb2O9 using stoichiometrically excess MgO. Mater. Lett. 53, 452-455.
• SUN, Y., ZHENG, H., DONG, Y., JIANG, X., SHEN, Y., SHEN, F., 2015. Melting and separation behavior of slag and metal phases in metallized pellets obtained from the direct-reduction process of vanadium-bearing titanomagnetite. Int J. Miner. Process. 142, 119-124.
• ZHAO, L.S., WANG, L.N., CHEN, D.S., ZHAO, H.X., LIU, Y.H., TAO, Q.I., 2015. Behaviors of vanadium and chromium in coal-based direct reduction of high-chromium vanadium-bearing titanomagnetite concentrates followed by magnetic separation. Nonferrous Met. Soc. China. 25, 1325-1333.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).