Al_2O_3对钒钛高炉渣冶金性能的影响及黏度预测模型

Effect of Al_2O_3 on metallurgical properties of blast furnace slags of vanadium-titanium magnetite and viscosity prediction model

为研究Al_2O_3对钒钛高炉渣主要冶金性能的影响,以国内某钢铁企业的钒钛磁铁矿现场高炉渣为基础,在其他组元不变的情况下采用化学试剂调控渣样成分,运用X线衍射(XRD)物相分析探索相关影响规律,从而以所得实验数据为基础,利用Weymann-Frenkel方程以及修正光学碱度Λcorr计算公式,建立相关黏度预测模型。研究结果表明,随着渣系中Al_2O_3质量分数的增加,炉渣高温黏度上升,熔化性温度TBr和黏流活化能Eη都呈上升趋势,渣系流动性和热稳定性均变差;所建立的黏度预测模型的平均偏差Δ为2.16%,模型预测值与实测值达成良好的吻合效果,可以真实有效地测量黏度,为实际生产节省成本。

In order to explore the effects of Al2O3 on the metallurgical properties of blast furnace(BF)slags about vanadium-titanium magnetite,all experiments samples were synthesized by adding the analytical reagent oxides of CaO,SiO2,MgO,Al2O3 and TiO2 into the base BF slag.Other compositions were invariable and the base BF slag was taken from Chengde Steel.The mechanism was analyzed by X-ray diffraction(XRD).The relevant viscosity prediction model was established based on experimental data using Weymann-Frenkel equation and the formula of calculating the fixed optical basicity.The results show that with the increase of Al2O3 mass fraction,the viscosity rises and the fluidity of BF slag is worse,the break-point temperature and the activation energy of viscous flow are also increased,and the thermos ability of slags is worse.The average deviation of viscosity model is 2.16%.The predicted viscosity values are in agreement with the experiment viscosity values,and the cost for the actual production is saved.