量化不同排斥在泡固体表面附着过程中对薄膜排水时间的贡献,以及对细颗粒漂浮的影响
Danlong Li1,2, Hainan Wang1, Rogerio Manica3
1School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China.
Langmuir : the ACS journal of surfaces and colloids
|April 30, 2024
概括
水力动力阻力显著减缓了薄膜的稀释,延长了气泡-颗粒接触时间,并改善了漂浮恢复. 调节泡表面的移动性可以提高矿物加工中的细颗粒回收.
科学领域:
- 矿物加工 矿物加工
- 合体和表面科学科学
- 流体动力学 流体动力学
背景情况:
- 微粒浮动受到泡附着不够的动能阻碍.
- 水力动力阻力和排斥性分离压力阻碍了气泡和颗粒之间的液体外流.
研究的目的:
- 量化排斥力对薄膜稀释时间的影响.
- 研究这些力量对气泡-固体表面相互作用和浮动恢复的影响.
主要方法:
- 起泡技术用于测量泡表面的移动性和水力动力阻力.
- DLVO理论分析静电排斥.
- 高速显微镜干扰测量用于薄膜排水动态.
- 漂浮恢复的实验.
主要成果:
- 液动力学力显著影响整个薄膜稀释过程.
- 不动的泡条件导致由于流体流量受限制而导致主导的中央薄膜稀释.
- 与静电排斥相比,高水力动力阻力会使薄膜稀释时间延长一个数量级.
- 移动泡增加了10%的漂浮回收.
结论:
- 排斥力极大地影响漂浮中的薄膜排水动力学.
- 调节泡表面的移动性可以提高微粒漂浮效率.
- 优化微/纳米尺度流体流提供了一条改善矿物加工资源利用的途径.
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