采用熔融－冷却方法并在渣中分别添加SiO₂和Al₂O₃进行改性，讨论了含钒钢渣中钒的富集以及钒 富集相的结晶与生长。研究表明，在添加SiO₂的含钒钢渣中，钒由分布在2CaO·SiO₂(C₂S)和2CaO·Fe₂O₃(C₂F)。两个相中转变为集中分布在Ca₃[(V,P,Si)]O₄]₂固溶体相中，其中 V₂O的质量分数达到24.38％，但是生 成的钒富集相晶体尺寸较小；在添加Al₂O₃的钢渣中，钒同样也富集在 Ca₃[(V,P,Si)]O₄]₂ 固溶体相中，其中 V₂O₅ 的质量分数达到14.90％。晶化试验表明 ， 钒富集相核化存在非均匀核化与均匀核化 ， 温度分别在1350℃ 和1325 ℃ ； 在1300 ℃ 保温条件下，钒富集相的晶体由 5 min 的 6.24 μm 生长到 580 min 的 25.19 μm，单位面积上的晶体数随之下降 。

The enrichment of vanadium and crystallization and growth of V-concentrating phase in V-bearing steelmaking slag are studied by adding SiO₂ and Al₂O₃ with the method of melting-cooling. The results show that when15% SiO₂ and 20% Al₂O₃ are added in slag, respectively, vanadium can be enriched in solid solution of Ca₃[(V,P,Si)]O₄]₂ from the original phases of 2CaO·SiO₂(C₂S) and 2CaO·Fe₂O₃(C₂F). The contents of V₂O₅ in Ca₃[(V,P,Si)]O₄]₂ reach 24.38% and 14.90%, respectively. It is demonstrated that when the slag is added by Al₂O₃, V-concentrating phase can nucleates homogeneously at1325℃and heterogeneously at 1350℃. When holding at crystallization temperature of 1300℃, the crystals of V-concentrating phase grow from mean diameter of 6.28μm for 5min to 25.19μm for 580 min, and the number of crystals per unit area is decreasing.