Research on discrete element parameter calibration of ore particles based on Tavares breakage model in a SAG mill

IF 4.1 2区 材料科学 Q2 ENGINEERING, CHEMICAL
Ming Bao, Wanrong Wu, Guangtian Tian, Binghui Qiu
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Abstract

Accurately simulating the crushing process of ore particles in a semi-autogenous grinding mill (SAG mill) is quite challenging. This study utilizes the discrete element method (DEM) to construct a breakage model for ore particles. Calibration of the discrete element basic parameters and Tavares breakage model parameters is conducted based on angle of repose (AoR) tests and single-particle impact tests. 3D scanning is employed to capture the morphology of the ore for particle modeling. On this basis, a discrete element breakage model for ore particles is built for single-particle impact simulations and validated through testing to determine the calibrated model parameters. The results indicate that the AoR angles and stacking shapes from the simulation and tests are highly similar, with a relative error of about 0.19%. The similarity in crushing outcomes and quantitative values between single-particle impact simulations and tests preliminary validates the reliability of the calibration method and the applicability of the Tavares breakage model, successfully determining a group of model parameters suitable for simulating ore particle crushing processes. This study lays the groundwork for utilizing DEM to simulate the visualization of ore particle crushing.

Abstract Image

基于塔瓦雷斯破碎模型的 SAG 磨机矿石颗粒离散元素参数校准研究
精确模拟矿石颗粒在半自磨机(SAG 磨机)中的破碎过程具有相当大的挑战性。本研究利用离散元素法(DEM)构建了矿石颗粒的破碎模型。离散元基本参数和塔瓦雷斯破碎模型参数的校准是基于静止角(AoR)试验和单颗粒冲击试验进行的。采用三维扫描捕捉矿石的形态,以建立颗粒模型。在此基础上,建立了用于单颗粒冲击模拟的矿石颗粒离散元素破碎模型,并通过测试进行验证,以确定校准模型参数。结果表明,模拟和试验得出的 AoR 角和堆积形状高度相似,相对误差约为 0.19%。单颗粒冲击模拟和试验在破碎结果和定量值上的相似性初步验证了校准方法的可靠性和塔瓦雷斯破碎模型的适用性,成功确定了一组适合模拟矿石颗粒破碎过程的模型参数。这项研究为利用 DEM 模拟矿石颗粒破碎的可视化奠定了基础。
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来源期刊
Particuology
Particuology 工程技术-材料科学:综合
CiteScore
6.70
自引率
2.90%
发文量
1730
审稿时长
32 days
期刊介绍: The word ‘particuology’ was coined to parallel the discipline for the science and technology of particles. Particuology is an interdisciplinary journal that publishes frontier research articles and critical reviews on the discovery, formulation and engineering of particulate materials, processes and systems. It especially welcomes contributions utilising advanced theoretical, modelling and measurement methods to enable the discovery and creation of new particulate materials, and the manufacturing of functional particulate-based products, such as sensors. Papers are handled by Thematic Editors who oversee contributions from specific subject fields. These fields are classified into: Particle Synthesis and Modification; Particle Characterization and Measurement; Granular Systems and Bulk Solids Technology; Fluidization and Particle-Fluid Systems; Aerosols; and Applications of Particle Technology. Key topics concerning the creation and processing of particulates include: -Modelling and simulation of particle formation, collective behaviour of particles and systems for particle production over a broad spectrum of length scales -Mining of experimental data for particle synthesis and surface properties to facilitate the creation of new materials and processes -Particle design and preparation including controlled response and sensing functionalities in formation, delivery systems and biological systems, etc. -Experimental and computational methods for visualization and analysis of particulate system. These topics are broadly relevant to the production of materials, pharmaceuticals and food, and to the conversion of energy resources to fuels and protection of the environment.
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