【摘要】 钒钛磁铁矿在全球范围内分布广泛，资源储量丰富。钒和钛作为航空航天、电子信息、高端制造、新能源、新材料等领域的关键金属元素，其在冶金及材料工业中的开发价值极为重要。然而，在基于高炉-转炉法的传统流程冶炼过程中，高炉渣中常常含有较高含量的氮化钛和碳化钛，这些高熔点化合物不仅容易导致炉内高炉渣黏度升高，还会导致渣中含铁、炉缸堆积等不良现象发生，影响正常生产。以黑龙江建龙公司提供的钒钛磁铁矿为原料，首先对其理化性质及成分进行了表征分析，设计相关试验探明炉渣熔化性能演变规律，同时研究了碱度和w（MgO）/w（Al₂O₃）对炉渣熔化性能的具体影响。试验结果表明，当TiO₂质量分数由11%升高至14%时，炉渣的软化温度、半球温度与流动温度分别达到1 245、1 255及1 267℃；随着碱度由1.1提升至1.4，这3项温度指标也呈现增长趋势，至碱度1.4时分别为1 240、1 247和1 259℃；而w（MgO）/w（Al₂O₃）从0.5增大至0.9过程中，炉渣软化温度、半球温度与流动温度均明显下降，最低分别为1 208、1 222及1 238℃。就黏度而言，TiO₂含量变化对其影响较小，碱度升高能有效降低黏度，而w（MgO）/w（Al₂O₃）对黏度影响最为敏感。当w（MgO）/w（Al₂O₃）从0.5升高至0.9时，黏度显著下降，w（MgO）/w（Al₂O₃）继续升高至1.1时，黏度下降趋势变缓。此研究为优化钒钛矿冶炼工艺、抑制TiN和TiC的不利影响提供了理论依据。更多还原

【Abstract】 Vanadium-titanium magnetite is widely distributed globally with abundant reserves.Vanadium and titanium are key metal elements in aerospace, electronic information, high-end manufacturing, new energy, new materials and other fields, and their development value in metallurgy and material industry is extremely important.However, in the traditional process smelting process based on the blast furnace-converter method, the blast furnace slag is often accompanied by a high content of titanium nitride and titanium carbide.These high melting point compounds not only easily lead to the increase of blast furnace slag viscosity in the furnace, but also lead to bad phenomena such as iron content in the slag and accumulation of the hearth, which affect the normal production.Vanadiumtitanium magnetite provided by Heilongjiang Jianlong Company was used as raw material.Firstly, its physical and chemical properties and composition were characterized and analyzed, and relevant experiments were designed to explore the evolution law of melting performance in slag.At the same time, the specific effects of alkalinity and w（MgO）/w（Al₂O₃） on melting performance were further studied.The results show that when the mass fraction of TiO₂ increases from 11% to 14%, the softening temperature, hemispherical temperature and flow temperature of slag reach 1 245, 1 255 and 1 267 ℃, respectively.With the increase of alkalinity from 1.1 to 1.4, the three temperature indexes also show an increasing trend, which are 1 240, 1 247 and 1 259 ℃ respectively when the alkalinity is 1.4.With the increase of w（MgO）/w（Al₂O₃） from 0.5 to 0.9, the slag softening, hemispherical and flow temperatures decrease significantly, with the lowest values of 1 208,1 222 and 1 238 ℃, respectively.In terms of viscosity, the change of TiO₂ content has little effect on it.The increase of alkalinity can effectively reduce the viscosity.The w（MgO）/w（Al₂O₃） is the most sensitive to the viscosity, the viscosity decreases significantly from 0.5 to 0.9, and the downward trend slows down when it continues to rise to 1.1.It provides a theoretical basis for optimizing the vanadium-titanium ore smelting process and inhibiting the adverse effects of TiN and TiC.更多还原