Effect of ball mill media charge characteristics on ore breakage

在优化磨矿介质装药特性以提高球磨性能的背景下，COREM在过去几年中一直在开发一种离线模拟器，主要基于ITASCA软件DEM仿真包。该模拟器在本项目框架中称为CORSim，其开发包括三个主要组成部分：研磨介质磨损、球磨机内的能量和事件分布以及矿石破碎。在这一发展过程中，提出了一些需要进一步研究和验证的问题。具体来说，这些问题是：1。ITASCA生成的能量分布与DEM模拟的单粒矿石破碎能级之间的相干性是什么？我们能证实作用在球磨机里的球上的能量和力吗？是否可以开发并验证DEM矿石破碎模型来模拟1 cm到0.1 mm范围内的破碎？能量分布与矿石解离之间的关系是什么？这些问题将通过实现以下两个目标来解决，其结果将构成该项目的可交付成果：验证实验室和中试工厂磨球上的能量分布，并将结果外推到工业磨球上。开发并验证了应用于球磨的简化DEM破碎模型，并将结果外推到矿石解离上

In the context of optimizing the grinding media charge characteristics to improve ball milling performances, COREM has been developing over the last years an off-line simulator mainly based on the ITASCA software DEM simulation package. The simulator, referred to as CORSim in the frame of this project, development includes three main components: grinding media wear, energy and event distributions within the ball mill, and ore breakage. Over this development, a number of questions have been raised that require further research and validation.Specifically, the issues are:l.  What is the coherence between the energy distributions generated by ITASCA and the energy levels involved in single particle ore breakage from DEM simulation?2. Can one validate the energies and forces acting on a ball inside a ball mill?3. Can a DEM ore breakage model be developed and validated to simulate breakage in the 1 cm to 0.1 mm range?4. What is the relationship between energy distributions and ore liberation?These issues will be addressed by meeting the following two objectives the results of which will constitute the deliverables of the project:1. Validate energy distributions acting on a grinding ball in a lab and pilot plant mills and, extrapolate theresults to industrial mills2. Develop and validate a simplified DEM ore breakage model applied to ball milling and extrapolate theresults to ore liberation