中性气氛下钒钛磁铁矿高炉渣系研究

以钒钛磁铁矿现场高炉渣为基础,纯化学试剂调制渣样,在中性气氛条件下研究了炉渣二元碱度及Mg O,Al2O3,Ti O2,V2O5含量对实验渣系冶金性能的影响.结果表明:增加碱度和Mg O含量,炉渣熔化性温度(tm)、初始黏度(η0)和高温黏度(ηh)呈先降低后升高趋势;增大Al2O3含量,炉渣tm升高,η0先降低后升高,ηh呈上升趋势;增大Ti O2含量,炉渣tm升高,η0和ηh逐渐下降,炉渣黏流活化能升高,热稳定性变差;增大V2O5含量,炉渣tm先降低后升高,η0和ηh逐渐增大.高炉冶炼钒钛磁铁矿适宜渣系为:二元碱度1.15,Mg O,Al2O3,Ti O2,V2O5质量分数分别为13%,13%,7%,0.30%.

Study on Blast Furnace Slag System of Vanadium-Titanium Magnetite Under Neutral Atmosphere

The components of practical blast furnace (BF) slag of vanadium-titanium magnetite were adjusted by adding pure chemical reagents. The effects of binary basicity， MgO， Al2O3， TiO2 and V2O5 on the metallurgical properties of experimental slag were studied under neutral atmosphere. The results showed that with increasing content of basicity and MgO， the melting temperature (t○m)， initial viscosity (η○0) and high-temperature viscosity (η○h) of slag first decrease and then increase. As increasing Al2O3 content， t○m increases， η○0 first decreases and then increases， η○h increases. When increasing TiO2 content， t○m increases， η○0 and η○h decrease. The viscosity flow activation energy of slag increases and the heat stability of slag becomes worse. With increasing V2O5 content， t○m first decreases and then increases， η○0 and η○h increase. The suitable BF slag for smelting vanadium-titanium magnetite is: binary basicity 1.15，MgO 13%， Al2O3 13%， TiO2 7%，V2O5 0.30%.