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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 solid phase precipitation temperature and viscosity of blast furnace slag samples and correspondingly prepared four groups of slag were compared. The solid phase precipitation temperature and viscosity of slag samples were detected by electron probe and rotating method respectively. The results show that the precipitation temperature of the blast furnace slag in the field is 1 400 ~ 1 440 ℃. The temperature of solid precipitation of the four groups of slag is 40 ~ 50 ℃ higher than that of the blast furnace slag. The presence of trace elements such as S (CaS form), FeO, MnO and TiO2, etc. helps reduce the solid-phase precipitation temperature. Viscosity test shows that the viscosity of blast furnace slag at 1 500 ℃ is 0.3 ~ 0.4 Pa · s, and the corresponding four groups of slag at 1 500 ℃ viscosity is about 30% higher than on-site slag. Through the above comparison, we not only understand the overall impact of the trace elements in blast furnace slag on blast furnace slag, but also help to apply the laboratory results to the field operation.