混合物料中石墨组分的碎裂特性及参数估计

Fracturing characteristic and parameter estimate of graphite component of mixture

利用Reid总体平衡微积分分批磨碎动力学方程,研究石墨-方解石物料混合磨碎时,石墨的磨碎动力学行为。结果表明:对碎裂速率函数Si而言,混合磨碎时石墨组分的碎裂速率函数Si表现为与时间t相关,即ln mi与t的关系曲线呈非线性关系。同时,模型仿真结果表明,石墨组分表现的非线性碎裂结果的模拟值与实验值吻合度较高;而石墨组分混合磨碎的碎裂分布函数bij则与单独磨碎时的碎裂分布函数bij基本相同。该结论可作为石墨磨碎生产实践的理论指导。

The batch grinding kinetic equation based on Reid balance calculus was used to study the grinding dynamics behavior of graphite in a mixed material of graphite-calcite. The results show that, for the function on the broken rate Si, the fracture rate of graphite components in function expression is related to timet, which shows the nonlinear relationship between lnmi andt. The simulation values and experiment values of graphite component nonlinear fracture results are well agree with each other. For the fracture distribution functionbij, the fracture distribution functions of graphite components in the mixed material grinding and separate mineral grinding are basically the same. The aforementioned conclusion can take theoretical guide for the production practice of graphite grinding.