某磁铁精矿粉粒度虽然非常细,小于0.044 mm的比例达到88％,但由于该矿粉颗粒形貌为板状、片状结构,故为中等成球性能矿粉.采用高压辊磨对该矿粉进行预处理后,其颗粒形貌发生很大变化,造球性能得到改善,膨润土单耗降低,但生球爆裂温度有下降趋势；高压辊磨预处理铁矿粉后,对改善预热球团矿的抗压强度效果不明显,但成品球团抗压强度得到提高.研究结果表明,高压辊磨预处理对细粒度磁铁精矿粉的造球性能及成品球强度有明显的改善效果.
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