The suitable titanium slag composition with high titanium content for electric furnace smelting of vanadium titanomagnetite was investigated through thermodynamics and related phase diagram analysis. According to the thermodynamic results, low-melting-point regions and MgTi2O5 primary phase area in the phase diagrams, the suggested titanium slag composition for the present vanadium titanomagnetite metallized pellets should consist of 50％ TiO2, 8％?12％ MgO and 13％ Al2O3 (mass fraction) with a binary basicity of 0.8?1.2. Finally, the verified smelting experiments were conducted and successful separation of the molten iron from the titanium slag is obtained. The obtained vanadium-containing molten iron contains 0.681％ V and 0.267％ Ti, and the obtained titanium slag contains 52.21％ TiO2(mass fraction), in which MgTi2O5 is the primary phase. The titanium resource in the final titanium slag production could be used to produce TiO2 pigment by acid leaching methods.%对适宜于预还原电炉法冶炼钒钛磁铁矿的较高品位钛渣的组成进行研究.根据热力学分析结果和相图中的低熔点区域,建议的高品位直接还原电炉钛渣组成为约50％TiO2,8％～12％MgO和13％Al2O3(质量分数),二元碱度范围为0.8～1.2.电炉及感应炉验证实验表明,在所推荐的钛渣组成下,可实现渣铁的成功分离.所得的含钒铁水含有0.681％V和0.267％Ti(质量分数);所得钛渣以黑钛石(MgTi2O5)为主要物相,其TiO2品位为52.21％(质量分数).所得钛渣可满足后续采用酸法浸出回收钛的要求.
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