反击式破碎机破碎过程建模与仿真分析

为预测破碎产品粒度，有效控制破碎产品质量，基于总体平衡模型，建立了反击式破碎机的破碎过程模型，其中包括分级函数和破碎函数。确立了破碎产品粒度与破碎机转子半径、转子转速、给料粒度分布和给料速率的函数关系。为了解决给料粒度分布不均匀时，分析结果偏差较大的问题，提出采用粒度分布系数来描述给料粒度分布不均匀程度对分级函数的影响。利用CF250反击式破碎机进行破碎试验，对试验数据进行统计回归分析，建立破碎过程模型。以CF400反击式破碎机为算例，对不同转子转速和给料速率下的破碎产品粒度进行了仿真和试验分析，通过仿真分析结果与CF400反击式破碎机破碎花岗岩的试验数据相对比，验证了模型的可行性和可靠性。

Modeling and simulation on crushing process of impact crusher

In order to predict the size distribution of crushed product and effectively control the quality of crushed product，a model of crushing process based on population balance model in impact crushers was built incorporating classification and breakage matrices.The product size distribution was obtained as a function of the crusher’s rotor radius and velocity，the feed size distribution and the feed rate.To solve the deviation in analysis results，a size distribution coefficient was introduced to describe the classification function effects due to the uneven feed size distribution.The crushing process experiment was performed by CF250 impact crusher.The test data from the crusher were regressed，and then the model of crushing process was built.Based on the model，the variations of the product size distribution resulting from the changes in rotor velocity and feed rate were investigated.The simulation results validate the feasibility and reliability of the model by comparing the experimental data from the CF400 impact crusher in granite crushing.