Challenges in Applying the Unified Comminution Model
The concept of the Unified Comminution Model (UCM) was presented at the 23rd IMPC. The model utilises computational techniques to calculate the mechanical environment in any comminution device, and then incorporates the outcomes from rock breakage tests to predict the product from a device. The model is fully mechanistic, and incorporates the capability to simulate novel quipment. This paper presents the progress on the first application of this concept to applied comminution equipment.This novel comminution model aims to integrate all comminution models within a single structure. This will provide a step change in the predictive power of comminution models, and include a wide range of particle properties that will enable it to be linked to the upstream and downstream process of mining and recovery. Major advances over current models will be the capability to predict liberation, preferential grinding, performance of new and novel devices, and to have power as an integral driver of the comminution simulation process.The methodology and model structure have been developed. An equation within a population balance framework has been derived as the basis for the UCM. A set of SAG mill pilot has been used as the first test case. The breakage characteristics of the ore have been extensively tested utilising a new range of breakage tests required by the rigorous UCM structure. The mill was simulated with the EDEM-DEM software.A partial test simulation of the pilot SAG mill has been conducted. This serves to demonstrate the feasibility of this modelling technique, but still lacks important ore charactedsation components that are under development.The study has raised a number of significant challenges to the accepted understanding of the comminution process. Through addressing these challenges considerable insight has been gained into the energy environment in mills and the requirements of breakage testing. The ore characterisation methods and energy transmission derived from DEM simulations remain as major research items.
Comminution DEM SAG mills Modelling
M.S. Powell I. Govender A.T. McBride
Julius Kruttschnitt Mineral Research Centre, Australia Centre for Minerals Research, University of Cape Town, South Africa CERECAM, University of Cape Town, South Africa
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
367-376
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）