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矿浆在球磨机中的传输对球磨机的滞留量、滞留时间以及粉碎速率影响很大，进而影响磨矿功耗和产品的粒度分布。而对工业磨机，滞留时间分布和滞留量是不能事先预测的，因为对运转着的磨机，尤其是工业磨机，不可能用直接法测量其矿浆负荷。本文采用流体力学理论解决了矿浆传输问题。首先，采用离散元法预测了球介质的运动。然后，用一种叫示踪单元法的流体流动技术，处理穿过球荷孔隙的矿浆流。这种技术可能是唯一能够跟踪矿浆自由面的数值技术，因矿浆面随介质运动而波动。结果可预测矿浆的径向及轴向运动，进而可以得到磨机内矿浆物料和球介质的详细描述。这种模型预测情况在半工业试验中得到了证实，并且这种新方法是建立在流体流动物理学基础之上的，属纯理论模型。结果表明，对于工业磨机，在给矿固体含量一定的情况下，可以成功地预测滞留量。
Pulp transmission in the ball mill on the ball mill retention, retention time and the impact of crushing speed, thereby affecting the grinding power consumption and product size distribution. For industrial mills, the distribution of residence time and retention can not be predicted in advance, since it is not possible to measure the slurry load directly by operating mills, especially industrial mills. In this paper, the theory of fluid mechanics to solve the problem of slurry transmission. First of all, using the discrete element method to predict the ball media movement. The flow of the slurry through the void of the ball is then treated by a fluid flow technique called Tracer Cell. This technique may be the only numerical technique that can track the free surface of the slurry as the slurry surface fluctuates with the movement of the medium. The results predict the radial and axial movement of the slurry, which in turn gives a detailed description of the slurry and ball media in the mill. This model prediction is confirmed in the semi-industrial test, and the new method is based on the fluid flow physics, which is a purely theoretical model. The results show that for industrial mills, the hold-up can be successfully predicted with a given solids content.