[an error occurred while processing this directive] [an error occurred while processing this directive] [an error occurred while processing this directive]
[an error occurred while processing this directive]
Mining Technology and Mine Management

Experiment and Simulation Study on Crushing Characteristics of Ore Under Quasi-static Loading in a Mine

  • Shuhao HAO , 1 ,
  • Gaipin CAI , 1, 2 ,
  • Cheng YU 1 ,
  • Huiming CHEN 1
Expand
  • 1. School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
  • 2. Jiangxi Province Engineering Research Center for Mechanical and Electrical of Mining and Metallurgy, Ganzhou 341000, Jiangxi, China

Received date: 2022-07-28

  Revised date: 2022-12-22

  Online published: 2023-04-27

Highlights

In order to study the crushing characteristics of ore (siliceous rock) in a mine under quasi-static loading,a crushing model of ore particle group was established by using Tavares crushing model on the basis of cylinder loading test,and the crushing characteristics of cylinder loading test and crushing simulation analysis were compared and analyzed.The results show that:(1) The breakage of ore particle group can be divided into three stages.In the tight stage,the void fraction of ore group is decreasing,and the breakage process of ore particle group basically does not occur.In the crushing stage,the void fraction further decreases,the stress on the contact points between ore increases,and some ore begin to break.In the agglomerating stage,the stress of ore particle group will increase rapidly,a large number of fine powder particles will be produced,and the agglomeration phenomenon will occur.(2) When the maximum loading pressure is 400 kN,with the decrease of the feeding particle size of ore with narrow particle size (2 mm range),the higher the proportion of small particles after crushing,the proportion of crushed ore of -6 mm under different particle sizes of -18+16 mm,-16+14 mm and -14+12 mm is 25.63%,29.45% and 33.46%,respectively.(3) The effectiveness of the Tavares model is verified by the comparison between simulation and experiment,and the simulation parameters of ore in a mine are calibrated,which provides a new method for the simulation of ore particle crushing,and the research results provide a new idea for the subsequent design of crusher.

Cite this article

Shuhao HAO , Gaipin CAI , Cheng YU , Huiming CHEN . Experiment and Simulation Study on Crushing Characteristics of Ore Under Quasi-static Loading in a Mine[J]. Gold Science and Technology, 2023 , 31(2) : 323 -330 . DOI: 10.11872/j.issn.1005-2518.2023.02.096

[an error occurred while processing this directive]

2027年全球铂金市场预计出现100万盎司短缺

世界投资协会发布的《铂金摘要》对2024年至2027年铂金供需平衡的预期进行了更新。世界铂金投资协会预计,汽车、工业、首饰、投资四大领域将带动2027年全球铂金需求量至916万盎司;虽然预计2024年铂金供应短缺将稍缩小,但是随着矿产供应下行风险加剧,汽车和工业领域的需求增长,预计2027年铂金短缺的状况将扩大到近100万盎司。

中国市场投资者拓展经理林万丛分析说,矿产供应下行风险主要来源于2个因素。一是南非电力短缺,可能使得南非的矿产量有所下滑。目前已有南非矿商警告称,电力供应恶化可能使得矿产量仅在2023年就下降至5%~15%。二是西方对俄罗斯的制裁可能使得俄罗斯矿商无法及时更新采矿设备,这也有可能导致全球铂金矿产量有所下滑。因此,预计2027年全球铂金矿产量将下降至630万盎司,这将使得全球总铂金供应量在2027年下滑至817万盎司。

需求端,世界铂金投资协会预计铂金在汽车领域的需求在2024—2027年将会有较为强劲的增长,主要来源于3个因素。林万丛分析说,一是全球将会实施更为严苛的排放法规,尤其是中国市场将对重型车辆实行更为严格的尾气排放要求,这将使得重型车辆的载铂量有所提升。二是预计未来会有更多的铂金被用来替换三元催化器里面的钯金。三是预期氢燃料电池车在市场上的份额将会有所增加。因此,世界铂金投资协会预计,到2027年,汽车领域对于铂金的需求将上升至419万盎司。

首饰领域对铂金的需求将相对保持稳定。这一信心来源于北美铂金首饰市场需求在2013年至2022年期间年复合增长率为9%,这将支持中期前景的上调,并弥补中国铂金首饰市场持续下降的景象。同时,世界铂金投资协会预计,来自全球其他地区的铂金首饰需求将持续强劲,这也将抵消中国市场的持续下滑。因此,世界铂金投资协会预计,全球首饰领域对于铂金的需求在2027年将约为193万盎司。

工业领域方面,受经济因素及产能扩张时间的影响,世界铂金投资协会预计2024年工业需求将同比减少10%,但之后将会逐渐增加,到2027年预计需求量约为247万盎司。

投资领域方面,世界铂金投资协会预计,2024年至2027年将维持每年56万盎司左右的需求水平。到2027年全球投资需求约为56万盎司。

http://www.goldsci.ac.cn/article/2023/1005-2518/1005-2518-2023-31-2-323.shtml

Barrios G K P Tavares L M2016.A preliminary model of high pressure roll grinding using the discrete element method and multi-body dynamics coupling[J].International Journal of Mineral Processing,156:32-42.

Barrios G K P Jiménez-Herrera N Tavares L M2020.Simulation of particle bed breakage by slow compression and impact using a DEM particle replacement model[J].Advanced Powder Technology31(7):2749-2758.

Cil M B Buscarnera G2016.DEM assessment of scaling laws capturing the grain size dependence of yielding in granular soils[J].Granular Matter18(3):1-15.

Cleary P W Sinnott M D2015.Simulation of particle flows and breakage in crushers using DEM:Part 1-Compression crushers[J].Minerals Engineering,74:178-197.

Cui Shaowen Guo Xiaofei Xi Yue,et al,2020.Comminution tests of particle bed with different loading pressure[J].Metal Mine49(3):114-119.

Delaney G W Morrison R D Sinnott M D,et al,2015.DEM modelling of non-spherical particle breakage and flow in an industrial scale cone crusher[J].Minerals Engineering,74:112-122.

Guo Jin2019.Visualization of the Crushing Process of Multi-scale Cohesive Particle Model[D].Ganzhou:Jiangxi University of Science and Technology.

Hu Jian Gong Fengqiang Jia Hangyu2020.Research on mechanical and energy dissipation characteristics of red sandstone in SHPB compression test[J].Gold Science and Technology28(3):411-420.

Huang Dongming2007.Research on Working Mechanism and Working Performance Optimization of Compressive Crusher[D].Shanghai:Shanghai Jiaotong University.

Jiménez-Herrera N Barrios G K P Tavares L M2017.Comparison of breakage models in DEM in simulating impact on particle beds[J].Advanced Powder Technology29(3):692-706.

Liu Ruiyue2020.Study on Mechanism and Performance Evaluation of Cone Crusher[D].Beijing:University of Science and Technology Beijing.

Tavares L M Rodriguez V A Sousani M,et al,2021a.An effective sphere-based model for breakage simulation in DEM[J].Powder Technology,392:473-488.

Tavares L M Anderson S2021b.A stochastic particle replacement strategy for simulating breakage in DEM[J].Powder Technology,377:222-232.

Tavares L M2007.Breakage of single particles:Quasi-static[J].Handbook of Powder Technology,12:3-68.

Tavares L M2009.Analysis of particle fracture by repeated stressing as damage accumulation[J].Powder Technology190(3):327-339.

Xin Hengqi Huang Yanli Zhang Weiqing,et al,2020.Research on deformation and crushing rules and acoustic emission characteristics of gangue bulk under the condition of confined compression[J].Journal of Mining and Safety Engineering37(1):162-168.

Xu Kun Zhou Wei Ma Gang,et al,2018.Review of particle breakage simulation based on DEM[J].Chinese Journal of Geotechnical Engineering40(5):880-889.

Zhang Chengliang Liu Lei Wang Chao2016.Advanced Rock Mechanics and Engineering Application[M].Changsha:Central South University Press.

Zhou W Yang L Ma G,et al,2016.DEM analysis of the size effects on the behavior of crushable granular materials[J].Granular Matter18(3):1-11.

崔少文,郭小飞,郗悦,等,2020.不同施载压力下物料颗粒床压载试验[J].金属矿山49(3):114-119.

郭晋,2019.多尺度内聚颗粒模型的破碎过程可视化[D].赣州:江西理工大学.

胡健,宫凤强,贾航宇,2020.SHPB压缩试验中红砂岩的力学与能量耗散特性研究[J].黄金科学技术28(3):411-420.

黄冬明,2007.挤压类破碎机工作机理和工作性能优化研究[D].上海:上海交通大学.

刘瑞月,2020.圆锥破碎机工作机理及性能优化研究[D].北京:北京科技大学.

辛恒奇,黄艳利,张卫清,等,2020.侧限压缩条件下矸石变形破碎规律及声发射特征研究[J].采矿与安全工程学报37(1):162-168.

徐琨,周伟,马刚,等,2018.基于离散元法的颗粒破碎模拟研究进展[J].岩土工程学报40(5):880-889.

张成良,刘磊,王超,2016.高等岩石力学及工程应用[M].长沙:中南大学出版社.

Outlines

/

[an error occurred while processing this directive]