A study of bubble size/shape evolution in microbubble countercurrent contacting flotation column
A study of bubble size/shape evolution in microbubble countercurrent contacting flotation column
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微泡逆流接触浮选塔中气泡尺寸/形状演变的研究
DOI：
10.1002/apj.2865
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发表时间：
2022-12
影响因子：
1.8
通讯作者：
Peng Chen
中科院分区：
文献类型：
--
作者：
Jikang Han;yanfeng li;Peng Chen
阳离子捕收剂广泛应用于铁矿石、硅酸盐、氧化物等的浮选。目前对浮选柱槽的研究已经很多，但对阳离子捕收剂存在下浮选柱槽的流体力学性能的研究还有待进一步深入。为了研究GE 609在浮选柱中的起泡性能和流体力学特性，在实验规模的浮选柱中研究了气泡特性。利用高速摄像机记录气泡图像，通过图像分析测量不同条件下气泡的大小和形状。本文旨在探讨在逆流浮选柱中，在存在和不存在GE 609的情况下，分散气体和连续液体速度对不同轴向高度处的气泡尺寸和长径比的影响。在气速（Ug）为0.0021-0.0106 m/s、液速（UL）为0.00123-0.00209 m/s的范围内，利用高速摄像技术获得了不同轴向位置的气泡尺寸分布和形状。通过与有关文献的比较和对实验数据的研究，采用多元线性回归和量纲分析方法，分析了Sauter平均直径与Ug、UL和轴高的关系。利用实验数据建立了气泡直径与无因次排列的关联式，并与其它文献进行了比较。本工作中Weber数和Morton数关联式的预测值与实验值比较接近
Cationic collectors are widely used in the flotation of iron ore, silicate, oxides, and so forth. At this stage, so much research has been carried out on flotation.column cells, but more attention needs to be paid to the hydrodynamic properties in the presence of cationic collectors in cells. In order to study foaming.performance and hydrodynamic characteristics in the presence of GE609, the bubble characteristics are studied in an experimental scale flotation column. A.high-speed camera recorder is used to take bubbles' images, and the bubble size and shape under different conditions is measured by image analysis. This.paper aims to explore the effect of dispersed gas and continuous liquid velocities on the bubble size and aspect ratio at different axial heights in a countercurrent flotation column in the presence and absence of GE609. In the systems, the bubble size distributions and shapes at different axial positions.were obtained by using high-speed camera technology in the superficial gas velocity (Ug) ranges of 0.0021–0.0106 m/s and superficial liquid velocity (UL).ranges of 0.00123–0.00209 m/s. Through the comparison with relevant papers and studying the experiment data, the relationship between the Sauter mean.diameter and Ug, UL and axial heights have been analyzed by using multiple linear regression and dimensional analysis. The experimental data have been.adopted to establish the correlation between the bubble diameter and the dimensionless array, which have been compared with other literature. And the.predicted values/results of Weber and Morton number correlation in this work are relatively close to the experimental values
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DOI：
10.1016/j.chemolab.2019.103821
发表时间：
2019-09
影响因子：
3.9
作者：
Mingxi Ai;Yongfang Xie;Shiwen Xie;W. Gui
通讯作者：
Mingxi Ai;Yongfang Xie;Shiwen Xie;W. Gui
影响因子：
4.8
作者：
G. J. Harbort-;Danica Clarke
通讯作者：
G. J. Harbort-;Danica Clarke
新型三相流化床钢球颗粒旋转柱的床层流体动力学
影响因子：
4.8
作者：
Jikang Han;Taishan Liu;Yanfeng Li;Peng Chen;Mao Yin;Mengqi Ma;Geoffrey M Evans
通讯作者：
Geoffrey M Evans
影响因子：
3.9
作者：
Hongzheng Zhu;A. L. Valdivieso;Jinbo Zhu;Shaoxian Song;F. Min;Mario Alberto Corona Arroyo
通讯作者：
Hongzheng Zhu;A. L. Valdivieso;Jinbo Zhu;Shaoxian Song;F. Min;Mario Alberto Corona Arroyo
影响因子：
4.8
作者：
M. Nassif;J. Finch;K. Waters
通讯作者：
M. Nassif;J. Finch;K. Waters