Effect of V2O5 addition on the oxidation induration process of Hongge vanadium titanomagnetite pellet

ABSTRACT In the present work, the effect of V2O5 addition on the oxidation induration process of Hongge vanadium titanomagnetite pellet (HVTMP) was investigated by various characterisation methods. Experimental results showed that with the increase of V2O5 addition, the compressive strength of HVTMP decreased and the porosity increased. The V2O5 addition had marginal effect on the phase composition, but greatly affected the microstructure during oxidation induration process of HVTMP. The addition of V2O5 destroyed the compact structure, located in grain boundary and hindered the haematite recrystallisation, eventually had detrimental effect on the oxidation induration of HVTMP. Besides, a schematic diagram was formulated to describe the oxidation induration mechanism of HVTMP with various V2O5 additions. The current study will not only provide experimental evidence to establish a correlation between the V2O5 addition and oxidation induration of HVTMP, but also provide both theoretical and technical bases for its effective utilisation in either blast furnace or shaft furnace.

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