| 基于模型试验的散装铁精矿流态化细观规律 |
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| 引用本文： | 简琦薇,李宁,周健,李晨.基于模型试验的散装铁精矿流态化细观规律[J].同济大学学报(自然科学版),2015,43(7):1019-1024. |
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| 作者姓名： | 简琦薇 李宁 周健 李晨 |
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| 作者单位： | 同济大学 土木工程学院， 上海 200092；上海工程技术大学 机械工程学院， 上海 201620,上海出入境检验检疫局， 上海 200135,同济大学 土木工程学院， 上海 200092,上海出入境检验检疫局， 上海 200135 |
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| 基金项目： | 国家公益性(201310065) |
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| 摘 要： | 利用室内振动台模型试验,对散装铁精矿流态化细观规律进行了研究.基于细观图像采集分析系统,研究了铁精矿在流态化演化过程中颗粒间及颗粒与水分间的相互作用,分析了颗粒长轴方向、平均接触数、平面孔隙率等演化规律,探讨了铁精矿流态化细观规律及其与宏观现象间的联系.结果表明:水分迁移在铁精矿流态化演化过程中至关重要,其宏观表现是水液面上升;细观组构是控制铁精矿宏观力学行为的重要参数,其所反映的规律与宏观现象一致.
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| 关 键 词： | 铁精矿 流态化 细观组构 配位数 模型试验 |
| 收稿时间： | 2014/6/18 0:00:00 |
| 修稿时间： | 2015/4/29 0:00:00 |
Mesoscopic Mechanism of Fluidization for Bulk Iron Ore Concentrates Based on Model Test |
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| JIAN Qiwei,LI Ning,ZHOU Jian and LI Chen.Mesoscopic Mechanism of Fluidization for Bulk Iron Ore Concentrates Based on Model Test[J].Journal of Tongji University(Natural Science),2015,43(7):1019-1024. |
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| Authors: | JIAN Qiwei LI Ning ZHOU Jian and LI Chen |
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| Institution: | College of Civil Engineering, Tongji University, Shanghai 200092, China; College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China,College of Civil Engineering, Tongji University, Shanghai 200092, China; 2. College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China,College of Civil Engineering, Tongji University, Shanghai 200092, China and College of Civil Engineering, Tongji University, Shanghai 200092, China; 2. College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China |
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| Abstract: | A shaking table model test was carried out to study the mesoscopic mechanism of fluidization for iron ore concentrates in bulk under dynamic loading. By means of micro visualization system, meso evolutions of granular fabric were investigated including orientation of particle long axis, average coordination numbers and porosity. And the interaction between particles and water during the fluidization was analyzed. Then, the connection between meso mechanism and macro phenomenon was discussed. The results show that the water transfer, namely, the rising of water level, is important in the fluidization of iron ore concentrates. The mesoscopic fabric of iron ore concentrates, which is consistent with macro phenomenon, is an important parameter for the control of macroscopic mechanical behavior of iron ore concentrates. |
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| Keywords: | iron ore concentrates fluidization meso fabric coordination number model test |
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