中文摘要：

通过烧结实验,并结合Fact Sage6.0热力学软件研究钒钛烧结矿中各液相和钙钛矿的生成情况与温度的关系.结果表明,钒钛烧结矿的转鼓指数为55.20%,低温还原粉化指数仅为25.92%.XRD和矿相结构分析表明,烧结矿冶金性能差的主要原因是钙钛矿的存在破坏了液相黏结作用,骸晶状结构和树枝状钙钛矿明显增加,严重加剧裂纹的扩散,造成烧结矿质量明显下降.热力学计算得出,低温有利铁酸钙和硅酸钙等液相物质的生成,高温有利于钙钛矿的生成,当温度超过800℃时,钙钛矿含量基本保持稳定,铁酸钙和硅酸钙含量明显降低.

英文摘要：

The relationship between the formation of liquid and perovskite in vanadium-titanium magnetite sinter with temperature was studied by experiments and calculation with Fact Sage6.0 to verify the thermodynamic analysis data. The results show that the tumbler index of vanadium-titanium magnetite sinter is 55.2% and RDI only 25.92%. By XRD pattern and mineral phase structure analysis, the poor metallurgical properties of sinter is mainly due to the presence of perovskite undermining the role of liquid phase bonding, the skeletal structure and dendritic perovskite noticeably increase, which seriously aggravate the proliferation of crack, and result in significantly lower quality of sinter. Thermodynamic calculation shows that the low temperature is advantageous to the formation of liquid-phase calcium ferrite and calcium silicate, but the high temperature to the formation of perovskite. When the temperature is greater than 800 ℃, the content of perovskite is basically stable, but the content of calcium ferrite and calcium silicate decreases obviously.