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 specific energy consumption of grinding for such three different slag powders as water-quenching blast furnace (W-BF) slag, water-spraying basic oxygen furnace (W-BOF) slag and air-quenching basic oxygen furnace (A-BOF) slag, were compared using relative grindability method, and the characteristics of slag powder was investigated by using particle size distribution and fractal analysis. The results show that W-BF slag has better grindability than BOF slag. As for W-BF slag, its particle size distribution is regular, and the difference of characteristics between different particle size ranges is also small. However, tough phases are presented in the BOF slag, and the powder’s fractal dimensions between different particle size ranges have obvious differences. When slag powder is ground to very fine, the specific energy consumption of grinding for W-BOF and A-BOF slags are estimated to be 3.19 and 217 times of that for W-BF slag respectively. The FeO phase and metal iron in the BOF slags make them tougher than W-BF slag, and the presence of phase MgO·2FeO in W-BOF slag leads it less grindable than A-BOF slag.
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