在矿石入磨块度方面，据有关资料，矿石入磨的最佳块度13mm时，磨矿总能耗最低。但在许多选厂的实际生产中，矿石入磨块度常为45～70mm，一些地方小选厂多有80mm以上的。尽管磨矿效率受诸多因素影响，在上述情况下，目前应首先抓矿石入磨块度。如二道淘金矿加强破碎管理，矿石入磨块度由原来的50mm为小于35mm后，球磨机的日生产能力提高8.9%，成本降低1元／t。白云金矿改变破碎作业，矿石入磨块度由原50mm改为小于35～30mm，不但保证了分级溢流细度，在原矿品位下降0.9g∕t的情况下，精矿品位却上升6.81g∕t，金的回收率提高2%。
According to the relevant data, the best energy consumption of ore grinding is the lowest when the ore grinding is 13mm. However, in many of the actual production of the plant, the ore into the grinding block is often 45 ~ 70mm, some local small selection of more than 80mm. Although the grinding efficiency is affected by many factors, it is the first time to grasp the ore into the grinding block. Such as the two gold ore mine to strengthen the management of fragmentation, ore into the grinding block from the original 50mm is less than 35mm, the daily production capacity of the ball mill increased by 8.9%, cost reduction of $1 / T. Baiyun gold deposit change crushing operations, grinding block from the original 50mm to less than 35 ~ 30mm ore, not only to ensure that the graded overflow fineness in ore grade decreased 0.9g / T, 6.81g / t concentrate grade was increased, the gold recovery rate increased by 2%.
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