Effects of Temperature on Fe and Ti in Carbothermic Reduction of Vanadium Titanomagnetite with adding MgO

• Autorzy: Li Xiaohui , Kou Jue , Sun Tichang , Wu Shichao , Zhao Yongqiang

Identyfikatory

DOI

10.5277/ppmp19012

• Języki publikacji: EN

Abstrakty

EN

Effects of temperature on Fe and Ti in carbothermic reduction of vanadium titanomagnetite (VTM) concentrate with adding MgO at 1100~1500℃ were investigated. It was found that most of Fe in the VTM concentrate existed in the form of magnetite and a small amount existed as ilmenite; Ti in the VTM concentrate was mainly present in the form of ilmenite. The temperature had significant effects on Fe and Ti: increasing temperature was beneficial to decrease the Fe content in the magnesium titanate mixture, and the Fe content could decrease to 5.47% at 1500℃. Thermodynamic analysis showed that FeTiO₃ and MgO preferentially reacted to form Mg₂TiO₄, followed by MgTiO₃ and MgTi₂O₅ when the temperature increased from 1100℃ to 1500℃. Results of X-ray diffraction and scanning electron microscopy-energy dispersive spectroscopy analyzes showed that an intermediate product of MgFe₂O₄ would formed at 1300~1400℃ in the actual experiment. This caused the Fe content in the magnesium titanate mixture to increase from 21.32% to 22.85% when the temperature increased from 1200℃ to 1400℃. In addition, the size of magnesium titanate particles could increase from a few microns to approximately 100 µm when the temperature increased from 1100℃ to 1500℃, which was conducive to realize the separation of metallic iron and magnesium titanate.

Słowa kluczowe

EN

VTM concentrate; temperature; carbothermic reduction; Fe; magnesium titanate

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2019
• Tom: Vol. 55, iss. 4
• Strony: 917--927
• Opis fizyczny: Bibliogr. 30 poz., rys., tab.

Twórcy

autor

Li Xiaohui

• University of Science and Technology Beijing

autor

Kou Jue

• University of Science and Technology Beijing

autor

Sun Tichang

• University of Science and Technology Beijing

autor

Wu Shichao

• University of Science and Technology Beijing

autor

Zhao Yongqiang

• University of Science and Technology Beijing

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).