Importance of Consecutive Crushing for Crushing System

For a continuous crushing system, the system in dynamic balance is the ideal steady working state. The working process in this state is a quasi-stationary random process. The mean of each variable does not change over time except some fluctuation generated by a variety of random interference. Let's take the ball mill for an example. The distribution along the length of the ball mill and the energy input to the mill should be kept uniform. The the axial gradient of the material distribution is unchanged. Therefore, under the stable conditions of the input (feedwater feeding capacity, the feed particle size, the grindability), the system will have stable output (yield, product concentration, particle size distribution and working noise). The self-stabilization and self -unifomity trend of the milling system can be explained from the second law of generalized thermodynamics. As an independent system, the entropy always tends greatly within the system, which makes the inner part of the system in disordered state. However, outside of the system, there is stable water supply so that the system can continue to draw the negative entropy.
Any unstable external input will result in the change of the system state. If the system input fluctuation is less than its processing power, the fluctuations in the system status will only lead to the fluctuations of the output ( the change of yield and particle size distribution ) and the system itself will automatically reach the new dynamic equilibrium point. When the materials input outside is greater than the processing power of the system, the media can not timely grind and discharge the material. The material accumulation will further weaken the role of media grinding so that the material accumulation gradually increases in the mill. This  chain of causation of the automatic growth makes the grinding process enter the a vicious self-breeding state. The state marks the quick disintegration of the original steady state of the system. From the common view of the self-propagation process, there is also a critical condition in the milling system, i.e. the maximum processing capacity of the mill machine. The maximum processing capacity is not the unique value, but it is an area determined by the operating conditions. There will be self-propagation phenomenon when the system input is beyond this critical conditions. The critical condition of the maximum processing capacity of the milling system depends on the structure and stability of the system.
From the above analysis, the dynamic balance is a prerequisite for the normal work of the continuous grinding system. As a result, we should keep the stability of the machine.
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