Mechanism of micro/nano-bubble formation and cavitation effect on bubbles size distribution in flotation

被引：6
|
作者：
Deng, Xiaowei [1 ,2 ]
Lv, Bo [1 ]
Cheng, Gan [1 ]
Lu, Yang [1 ]
机构：
[1] Henan Polytech Univ, Coll Chem & Chem Engn, Jiaozuo 454000, Henan, Peoples R China
[2] Henan Polytech Univ, Coal Prod Safety Collaborat Innovat Ctr Henan Pro, Jiaozuo 454000, Henan, Peoples R China
来源：
PHYSICOCHEMICAL PROBLEMS OF MINERAL PROCESSING | 2020年 / 56卷 / 03期
基金：
中国国家自然科学基金;
关键词：
micro/nano-bubbles; cavitation effect; bubble size distribution; flotation; DIRECT FORCE MEASUREMENTS; DISSOLVED AIR FLOTATION; FINE PARTICLES; GAS; SURFACE; COLUMN; ALGAE; NANOBUBBLES; ADSORPTION; NUCLEATION;
D O I：
10.37190/ppmp/119883
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this study, micro/nano-bubble generated by cavitation effect as a promoting factor for flotation was investigated using the atomic force microscope (AFM). Hydrodynamic cavitation tests were performed with a venturi bubble generator. Additionally, bubble size distribution (BSD) under the hydrodynamic cavitation effect was also studied at different water flow speed conditions. Dozens of nanometers height bubbles attached to the hydrophobic substrates were detected. Besides, the cavitation cloud grew thicker with the flow velocity increasing from 26.52 m/sec to 53.04 m/sec, near the venturi tube nozzle. All results showed the importance of the cavitation effect on the micro/nano-bubbles formation and the BSD in flotation.
引用
收藏
页码：504 / 512
页数：9
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