首钢高炉渣与配制四组元渣的黏度研究

Research on Viscosity of Shougang Blast Furnace Slags and Synthetic Slags

对首钢高炉渣样及相应配制的四组元渣的固相析出温度和黏度进行了对比研究,通过电子探针和旋转法分别检测渣样的固相析出温度和黏度。结果表明,现场高炉渣固相析出温度为1 400~1 440℃,相应配制的四组元渣的固相析出温度要比现场高炉渣高40~50℃。其中微量组元如S（CaS形式）,FeO,MnO和TiO2等的存在有利于降低渣固相析出温度。黏度测试表明,现场高炉渣在1 500℃时的黏度范围为0.3~0.4Pa·s,相应配制的四组元渣在1 500℃时的黏度比现场渣要高30%左右。通过以上对比,不仅了解了高炉渣中微量组元对高炉渣的整体影响,而且有助于将实验室研究结果应用于现场操作。

The liquidus temperatures and viscosities of the industrial blast furnace slags from Shougang and the corresponding synthetic slags have been measured.Liquidus temperatures of these slags have been determined by high temperature equilibration,quenching and Electron Probe X-ray Microanalysis（EPMA）technique.The viscosities of these slags have been measured using the custom designed rotating bob apparatus which enables control of the gas atmosphere and rapid quenching of the samples after completion of the experiment.The microstructures and phase compositions of the quenched slag samples after the viscosity measurements were determined by EPMA.It was found that the liquidus temperatures of the industrial BF slags are in the range of 1 400 to 1 440℃.The liquidus temperatures of the synthetic slags are 40~50℃ higher than those of the corresponding industrial slags.Presence of minor components such as sulphur,TiO2,MnO and FeO in the slag all results in decrease of the liquidus temperature.The viscosities of the industrial BF slags are in the range of 0.3 to 0.4Pa·s at 1 500℃.The viscosities of the synthetic slags are 30% higher than those of the corresponding industrial slags at 1 500℃.The differences of liquidus temperature and viscosity between industrial slags and synthetic slags will be useful indications to apply the results of the synthetic slags to promoting the operation of the blast furnace.