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采用相对易磨性的方法比较了水淬高炉渣、滚筒转炉渣和风碎转炉渣的粉磨能耗。采用粒度分布和分形方法研究了炉渣微粉的特性。研究结果表明:水淬高炉渣易磨性最好,而滚筒转炉渣易磨性最差。水淬高炉渣微粉整体粒径分布均匀,不同粒度范围内微粉特性差异较小。而转炉渣中存在明显的难磨相,不同粒度范围内的分形分维数有明显差异。当炉渣微粉磨至很细时,单位质量滚筒转炉渣和风碎转炉渣的能耗分别约是水淬高炉渣的3.19和2.17倍。转炉渣中存在的FeO和金属铁导致其相对水淬高炉渣更难磨。滚筒转炉渣中的大量MgO.2FeO相导致其比风碎转炉渣更难磨。
The energy consumption of grinding of blast furnace slag, drum converter slag and converter slag of blast furnace was compared with the method of relative easy grinding. The characteristics of slag powder were studied by means of particle size distribution and fractal method. The results show that the water-quenched blast furnace slag is the best abrasive, while the drum converter slag is the worst abrasive. The overall particle size distribution of water-quenched blast furnace slag powder is uniform, and the difference of the powder characteristics in different particle size ranges is small. However, there are obvious hard grinding phases in the converter slag, and the fractal fractal dimensions in different grain sizes are obviously different. When the slag is finely pulverized to very fine, the energy consumption per unit mass of drum converter slag and blast furnace converter slag is about 3.19 and 2.17 times of that of water quenched blast furnace slag, respectively. The presence of FeO and metallic iron in the converter slag makes it more difficult to mill relative to water quenched blast furnace slag. The large amount of MgO.2FeO in drum converter slag makes it more difficult to mill than blast furnace slag.