球磨对细鳞片石墨破坏程度的影响研究
Influence of Ball Milling on the Degree of Graphite Destruction of Fine Scales
刘政 1钱玉鹏 2李鲁笑1
作者信息
- 1. 武汉理工大学 资源与环境工程学院,湖北 武汉 430070
- 2. 武汉理工大学 资源与环境工程学院,湖北 武汉 430070;关键非金属矿产资源绿色利用教育部重点实验室,湖北 武汉 430070;矿物资源加工与环境湖北省重点实验室,湖北 武汉 430070
- 折叠
摘要
以东北某细鳞片石墨矿为研究对象,考察球磨时间、球磨质量分数和介质填充率等因素对石墨鳞片破坏程度的影响,分析磨矿产物累计产率和颗粒中石墨鳞片平均粒径,探索石墨鳞片破坏机理.结果表明,磨矿过程中,粗粒石墨颗粒最先被破坏,球磨时间越长石墨鳞片破坏程度越高,当球磨时间为30 min时破坏程度最高,达到68.17%;球磨质量分数改变对连生体中石墨颗粒粒径变化影响较大,+300 μm和-300+180 μm区间粒级中连生体颗粒中石墨鳞片平均粒径下降幅度分别为6.69%和12.79%;介质填充率对石墨颗粒粒径影响较小.石墨矿物颗粒表面裂纹发育特征表明,颗粒越大,表面裂纹越多,越容易被破坏,石墨单体颗粒中的穿晶裂纹和连生体中的晶内裂纹是影响石墨鳞片破坏的主要因素.
Abstract
Taking a fine scale graphite mine in northeast China as research object,the influence of ball milling time,ball milling concentration and medium filling rate on the destruction degree of graphite scale was investigated,the cumulative yield of milling products and the average particle size of graphite scale in the particles were analyzed,and the destruction mechanism of graphite scale was explored.The results show that,in the process of milling,the coarse graphite particles are destroyed first.The longer the ball milling time is,the higher the degree of damage of graphite flakes is,the degree rises to the highest level,reaching 68.17%at 30 min.The change of ball milling concentration has a great impact on the change of graphite particle size in the intergrowth.The average particle sizes of graphite scales in+300 μm and-300+180 μm decreased by 6.69%and 12.79%,respectively;The medium filling rate has little effect on the particle size of graphite particles.The development characteristics of cracks on the surface of graphite mineral particles show that the larger the particles,the more surface cracks,the more likely it is to be destroyed.The penetrating cracks in graphite monomer particles and the internal crystal cracks in the intergrowth are the main factors affecting the destruction of graphite scales.
关键词
鳞片破坏/球磨/颗粒粒径/表面裂纹Key words
scale destruction/ball milling/particle size/surface crack引用本文复制引用
基金项目
国家重点研发计划(2021YFC2902901)
出版年
2024
NETL
NSTL
万方数据