Study on Liquid Phase Generation of Vanadium-titanium Sinter with Moderate Titanium Content

The factors influencing liquid phase generation of vanadium titanium-sinter with moderate titanium content had been investigated by sintering cup test combining with thermodynamic calculations and sinter microstructure observations.The results show that increasing alkalinity promotes Fe₂O₃ reaction with CaO leading to calcium ferrite formation and thus increase the amount of liquid phase,ie,improve the quality of sinter.With the increase of carbon content,the heat generated during sintering process would increase and then benefit to the generation of liquid silicate.As TiO₂ content increases,TiO₂ will take preferential reaction with CaO,which promotes perovskite generation and inhibit generation of calcium ferrite with better performance.The resulting perovskite dispersed between the slag phase and iron minerals weakens the bonding of silicate and crystal stock effect of hematite and magnetite containing titanium,and thus cause the reduction in liquid amount of sinter.