基于响应曲面法优化球磨机利用系数研究

Study on Optimization of Utilization Coefficient of Ball Mill based on Response Surface Method

为优化磨矿工艺参数,提高球磨机处理能力,采用单因素试验探索各操作参数对球磨机-0.074 mm利用系数的影响,单因素试验得到的最佳参数介质充填率为40%,料球比为0.057,矿浆浓度为70%,对应球磨机-0.074 mm利用系数为1.06 t/(m^(3)·h)。在单因素试验的基础上,采用响应曲面法继续优化磨矿工艺参数,得到的最优参数矿浆浓度为68.97%,料球比为0.055 6,介质充填率为37.64%,对应球磨机-0.074 mm利用系数为1.12 t/(m^(3)·h),且实际值与模拟值相对误差均小于3%。响应曲面法试验设计方案中的最优结果与单因素试验相比,球磨机-0.074 mm利用系数相对提高5.66%,说明采用响应曲面法可以提高磨机利用效率,并为提高后续选别指标提供准确的方案设计和参数优化。

In order to optimize the grinding process parameters and improve the processing capacity of the ball mill,the single factor test is used to explore the influence of various operating parameters on the uti-lization coefficient of-0.074 mm of the ball mill.The optimum parameters obtained by single factor test are medium filling rate of 40%,material ball ratio of 0.057,slurry concentration of 70%,and the utilization co-efficient of-0.074 mm of the ball mill is 1.06 t/(m^(3)·h).On the basis of single factor test,the response sur-face method is used to optimize the grinding process parameters.The optimal parameters are obtained as fol-lows:the slurry concentration is 68.97%,the material-ball ratio is 0.0556,the medium filling rate is 37.64%,and the utilization coefficient of the corresponding ball mill-0.074 mm is 1.12 t/(m^(3)·h),and the relative error between the actual value and the simulated value is less than 3%.Compared with the single fac-tor test,the optimal result of the response surface method test design scheme is that the utilization coeffi-cient of the ball mill-0.074 mm is relatively increased by 5.66%,indicating that the response surface meth-od can improve the utilization efficiency of the mill and provide accurate scheme design and parameter opti-mization for improving the subsequent selection index.