Yang Guangqing, Yang Wenkang, Li Xiaosong, Yin Sibo, Zhou Ziqing. Comparative Study of Microstructure Changes in Vanadium Titanium Sinter and Ordinary Sinter during Reduction Process[J]. IRON STEEL VANADIUM TITANIUM, 2018, 39(2): 102-109. doi: 10.7513/j.issn.1004-7638.2018.02.017
Citation:
Yang Guangqing, Yang Wenkang, Li Xiaosong, Yin Sibo, Zhou Ziqing. Comparative Study of Microstructure Changes in Vanadium Titanium Sinter and Ordinary Sinter during Reduction Process[J]. IRON STEEL VANADIUM TITANIUM, 2018, 39(2): 102-109. doi: 10.7513/j.issn.1004-7638.2018.02.017
Yang Guangqing, Yang Wenkang, Li Xiaosong, Yin Sibo, Zhou Ziqing. Comparative Study of Microstructure Changes in Vanadium Titanium Sinter and Ordinary Sinter during Reduction Process[J]. IRON STEEL VANADIUM TITANIUM, 2018, 39(2): 102-109. doi: 10.7513/j.issn.1004-7638.2018.02.017
Citation:
Yang Guangqing, Yang Wenkang, Li Xiaosong, Yin Sibo, Zhou Ziqing. Comparative Study of Microstructure Changes in Vanadium Titanium Sinter and Ordinary Sinter during Reduction Process[J]. IRON STEEL VANADIUM TITANIUM, 2018, 39(2): 102-109. doi: 10.7513/j.issn.1004-7638.2018.02.017
1. Yisheng College, North China University of Science and Technology, Tangshan 063009, Hehei, China;
2. College of Metallurgy and Energy, North China University of Science and Technology, Hebei Key Laboratory of Modern Metallurgical Technique, Tangshan 063009, Hehei, China
The reduction process of vanadium titanium sinter and ordinary sinter is studied in laboratory simulated blast furnace.Heating process immediately ceases when the preset temperatures reaches 500 ℃,600 ℃,700 ℃,800 ℃,900 ℃,900 ℃ isothermal holding,1 000 ℃,1 100 ℃,1 200 ℃,1 100 ℃,1 400 ℃,1 500 ℃,and then the N2 gas flow is injected to cool the sinter down to room temperature.The microstructure of vanadium titanium sinter and ordinary sinter were observed by scanning electron microscope and optical microscope.X-ray diffractometer was used to determine the structure of the sinters obtained at different temperatures.The reducibility of vanadium titanium sinter is worse than that of ordinary sinter.The phase of vanadium titanium sinter ore is more complex,with uneven structure and low temperature reducibility.When the titanium hematite was reduced to titanomagnetite,the generated titanium ferrite and some unreducible solid solution increased the difficulty of subsequent reduction,so that the whole reduction of vanadium titanium sinter was delayed in the ordinary sinter.The liquid phase viscosity of vanadium titanium sinter is larger than that of ordinary sinter.
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