Effect of roughness and shape factor on flotation characteristics of glass beads
Effect of roughness and shape factor on flotation characteristics of glass beads
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DOI：
10.1016/j.colsurfa.2015.12.025
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发表时间：
2016-03-05
影响因子：
5.2
通讯作者：
Celik, Mehmet S.
中科院分区：
文献类型：
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作者：
Hassas, Behzad Vaziri;Caliskan, Hidayet;Celik, Mehmet S.
考察了表面粗糙度和形状因子对浮选过程中颗粒行为的影响。采用酸蚀的方法对150+106微米的球形玻璃微珠进行了不同程度的表面粗糙度处理。相同大小间隔、不同形状因子的磨玻璃珠也进行了同样的处理。从浮选回收率、接触角和气泡-颗粒附着等方面考察了这些变化对颗粒表面形态的影响。将原子力显微镜(AFM)用于表面粗糙度表征，提出了一种球形颗粒表面粗糙度测量的校正方法。使用数字图像分析仪对形状因子进行表征。结果表明，随着表面粗糙度的增加，浮选回收率、接触角和气泡附着率均有所提高。然而，形状因素在浮选和气泡附着中更占主导地位。这归因于研磨颗粒的锋利边缘的作用，它触发了薄膜破裂过程，缩短了附着时间。(C)2015爱思唯尔B.V.保留所有权利。
The effect of surface roughness and shape factor on behavior of particles in flotation has been investigated. Surface roughness of various degrees was applied on spherical glass beads of 150 + 106 mu m by means of acid etching. The same procedure was also performed on ground glass beads of the same size interval with different shape factors. The effect of these variations on surface morphology of particles was investigated in terms of flotation recovery, contact angle, and bubble-particle attachment. An Atomic Force Microscope (AFM) was used for surface roughness characterizations and a correction methodology on roughness measurements of spherical particles is proposed. A digital image analyzer was used for shape factor characterizations. It is shown that increase in surface roughness improves the flotation recovery, contact angle, and bubble attachment. Shape factor, however, was found to be more predominant in flotation and bubble attachment. This is attributed to the effect of sharp edges of ground particles which triggers the film rupture process and shortens the attachment time. (C) 2015 Elsevier B.V. All rights reserved.