ABSTRACT

In order to explore the influence of unburned pulverized coal in ironmaking on the viscosity of blast furnace slag, the impact of temperature, volume fraction of solid particles and the rotating speed on the viscosity of CaO–MgO–Al₂O₃–SiO₂ heterogeneous slag were studied by experiment. The calculation model of relative viscosity of heterogeneous slag containing unburned pulverized coal is corrected. The results showed that the viscosity of heterogeneous slag increased with the increase of the volume fraction of the solid particles, and decreased with the increase of the rotating speed. For the heterogeneous slag with the same composition, the relative viscosity is not affected by the temperature and decreases with the increase in the rotating speed. The impact of unburned pulverized coal solid particles on the viscosity of the slag was much larger than the predicted value of the Einstein–Roscoe equation.

摘要

为探究炼铁未燃煤粉对高炉渣黏度的影响，温度、固体颗粒体积分数和转速对CaO-MgO-Al 2 O 3 _-SiO 2_黏度的_影响通过实验研究了非均质渣。修正了含未燃煤粉的非均质渣相对粘度计算模型。结果表明，非均相渣的黏度随固体颗粒体积分数的增加而增加，随转速的增加而降低。对于成分相同的非均相炉渣，其相对粘度不受温度影响，随转速的升高而降低。未燃煤粉固体颗粒对炉渣粘度的影响远大于爱因斯坦-罗斯科方程的预测值。