自还原钒渣压块的直接合金化行为  

Direct alloying of self-reduction vanadium slag briquette

作　　者：吕兴 王楠 陈敏 信建疆 LüXing;Wang Nan;Chen Min;Xin Jianjiang(School of Metallurgy,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学冶金学院,沈阳110819

出　　处：《材料与冶金学报》2023年第4期313-320,共8页Journal of Materials and Metallurgy

基　　金：国家自然科学基金项目(52074077)。

摘　　要：提出了一种钒渣在线还原直接合金化冶炼含钒钢的工艺,并通过热力学分析及实验研究,阐明了钒渣中氧化物的选择性还原趋势、钒回收率的影响因素以及合金化过程的反应机理.结果表明:在合金化20 min后,钢液中钒的质量分数快速上升至0.56%;随着合金化温度从1520℃升高到1600℃,钒的回收率从70.23%增至84.54%,并且在温度1600℃、压块碱度0.5、合金化时间25 min的最佳实验条件下,钒的回收率最高可达90.04%.此外,为保证钒渣快速合金化和钒的高回收率,可将钒渣与还原剂混合制成较小尺寸的钒渣压块,以实现在工业生产中提高钒回收率的目的.A process of direct alloying vanadium containing steel by on-line reduction of vanadium slag was put forward.The selective reduction trend of oxides in vanadium slag,the influencing factors of vanadium yield and the reaction mechanism of alloying process were elucidated through thermodynamic analysis and experimental study.The results show that the mass fraction of vanadium in molten steel increases rapidly to 0.56%after 20 min alloying.With the alloying temperature increasing from 1520℃to 1600℃,the vanadium yield increased from 70.23%to 84.54%.Under the optimal experimental conditions of reduction temperature of 1600℃,pressing basicity 0.5,and alloying time 25 min,the highest vanadium yield could reach 90.04%.In addition,to ensure rapid alloying of vanadium slag and high vanadium yield,it is suggested that vanadium slag and reducing agent can be mixed to make vanadium slag compact with a smaller size,to achieve the purpose of increasing vanadium yield in industrial production.

关 键 词：钒渣 含钒钢 自还原 直接合金化 钒回收率 

分 类 号：TF[冶金工程]