The effect of feed chute design on tertiary cone crusher performance at the Sarcheshmeh copper complex was studied by an in-house developed DEM software called KMPC_DEM©. To simulate the overall crushing circuit, the multi-geometry procedure by improving the routines of object files importing into the simulation environment was implemented in DEM codes. The calibration of DEM parameters was performed using the observed angle of the pile formed on the conveyor (surcharge angle). Various feed chute designs were then employed in the simulations based on an experimental design to find more uniform feed distribution on the distribution plate of the crusher. More uniform feed distribution was obtained by changing the shape of feed chute from cubic to cylindrical, decreasing its surface area from 0.34 to 0.24 m² and increasing the cylinder length above and below the feed chute plate from 0 to 45 cm and from 53 to 74 cm, respectively. This was verified by proximity of center of the mass of distributed feed to the center of crusher distribution plate. After installing the new feed chute design in the plant, a detail monitoring over a period of 15 months showed a reduction of the standard deviation of crusher power draw from 13 to 3 kW. A better crusher control, 36% increase in the crusher throughput and finer and narrower product size distribution were among the main outcomes of the new feed chute. It was concluded that the wear rate on mantle and liners of crusher not only decreased but it also became uniform.

通过内部开发的DEM软件（称为KMPC _DEM © ）研究了送料斜槽设计对Sarcheshmeh铜矿综合设施中三级圆锥破碎机性能的影响。为了模拟整个破碎回路，通过改进DEM代码中的目标文件导入到模拟环境中的例程，实现了多几何程序。DEM参数的校准是使用观察到的在输送机上形成的桩的角度（附加角）进行的。然后，基于实验设计，在模拟中采用了各种进料溜槽设计，以在破碎机的分配板上找到更均匀的进料分布。通过将进料溜槽的形状从立方更改为圆柱形，将其表面积从0.34减小到0.24 m，可以实现更均匀的进料分布^如图2所示，将进料斜槽板上方和下方的圆筒长度分别从0增大至45 cm和从53增大至74 cm。这通过分布的进料的质量中心与破碎机分布板的中心的接近来验证。在工厂中安装了新的进料槽设计后，在15个月的时间内进行的详细监控显示，破碎机功率消耗的标准偏差从13 kW降低到3 kW。新型进料溜槽的主要成果包括更好的破碎机控制，破碎机产量增加36％，更细，更窄的产品尺寸分布。结论是，破碎机的衬套和衬套的磨损率不仅降低，而且变得均匀。