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基于热力学、工艺矿物学和热态实验，系统研究了炉渣二元碱度R2[即w(CaO)/w(SiO2)]对钒钛磁铁矿预还原团块熔分行为的影响. FactSage热力学计算结果表明，提高R2能够降低熔分生铁中的Ti含量，而对Fe和V的生成温度及生成量影响较小.综合热态实验结果和工艺矿物学理论可得：当R2由0.43升至0.8时，熔分生铁中Fe和V的回收率分别由97.07%和82.31%升至98.89%和89.48%;熔分渣中TiO2的回收率由93.67%升至95.21%.低熔点相的形成可降低铁合金相夹杂程度，促进有价元素的定向迁移，从而改善渣铁分离效果.当R2高于0.8时，其对有价组元的回收率影响较小，高熔点物相钙钛矿的生成使熔分渣相的熔点升高，黏度和渣量增大，从而增加了电炉冶炼成本和能耗.
Abstract：Based on thermodynamics, process mineralogy and thermal experiments, the effects of binary basicity of slag R2 [i.e. w(CaO)/w(SiO2)] on the smelting behavior of vanadium-titanium magnetite pre-reduced pellets have been systematically studied. The results of FactSage thermodynamic calculation show that increasing R2 can reduce the Ti content in molten pig iron, while having little effect on the temperature and amount of Fe and V formation. Combining the thermal experiments results and process mineralogy theory, it can be concluded that when R2 increases from 0.43 to 0.8, the recovery rates of Fe and V in the molten pig iron increase from 97.07% and 82.31% to 98.89% and 89.48%, respectively; The recovery rate of TiO2 in the molten slag increases from 93.67% to 95.21%. The formation of low melting phases reduces the degree of inclusions in the ferroalloy phase, promotes the directional migration of valuable elements, and thus improves the slag iron separation effect. When R2 is higher than 0.8, its impact on the recovery rate of valuable components is relatively small. The formation of high melting point perovskite increases the melting point, viscosity, and slag amount of the molten slag phase, thereby increasing the cost and energy consumption of EAF.
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基本信息:
DOI：10.14186/j.cnki.1671-6620.2026.01.004
中图分类号:TF55
引用信息:
[1]赵猛,田宏宇,储满生,等.炉渣二元碱度对钒钛磁铁矿预还原团块熔分行为的影响[J].材料与冶金学报,2026,25(01):30-36+45.DOI:10.14186/j.cnki.1671-6620.2026.01.004.
基金信息:
国家自然科学基金项目(52404341);国家自然科学基金重点项目(U23A20608); 中国五矿集团有限公司科技专项计划项目(2021ZXA04)
2025-12-08
2025-12-08
2025-12-08