Investigation of bubble-particle interactions in a mechanical flotation cell, part 1: Collision frequencies and efficiencies

被引:23
|
作者
Darabi, Hossna [1 ]
Koleini, S. M. Javad [1 ]
Deglon, David [2 ]
Rezai, Bahram [3 ]
Abdollahy, Mahmoud [1 ]
机构
[1] Tarbiat Modares Univ, Dept Mineral Proc, Tehran 1411511, Iran
[2] Univ Cape Town, Dept Chem Engn, Mineral Proc Res Unit, ZA-7700 Cape Town, South Africa
[3] Amirkabir Univ Technol, Dept Min & Met Engn, Tehran 1591634311, Iran
关键词
Mechanical flotation; Turbulent kinetics energy dissipation; Bubble-particle collision frequency; Bubble-particle collision efficiency; GAS DISPERSION; TURBULENCE; HYDRODYNAMICS; SIZE; SURFACE; RATES;
D O I
10.1016/j.mineng.2019.01.012
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
In this study the influence of impeller speed and superficial gas velocity on hydrodynamic parameters, bubble-particle collision frequency and efficiency using pure quartz particles of different sizes in an aerated Denver flotation cell was investigated. Collision frequency in different parts of cell was calculated by local turbulent energy dissipation rate measurements. Collision efficiency due to gravitational, inertial, interceptional and turbulence mechanism was determined. The overall collision efficiency (E-c) was also investigated. The results showed that the bubble-particle frequencies for different particle sizes in the turbulent zone were 10-12 times higher than in the quiescent zone. Under various hydrodynamic conditions, minimum and maximum values of E-c were observed for - 38 gm and - 300 + 212 mu m particles, respectively. The turbulence mechanism was the main collision mechanism for fine particles. The collision efficiency of coarse particles was mainly influenced by gravitational, inertial and interceptional mechanisms.
引用
收藏
页码:54 / 64
页数:11
相关论文
共 31 条
  • [21] PROBABILITY OF PARTICLE-BUBBLE COLLISION IN PNEUMO-MECHANICAL FLOTATION CELL
    Brozek, M.
    ARCHIVES OF METALLURGY AND MATERIALS, 2010, 55 (01) : 293 - 304
  • [22] Investigation of flotation bubble-particle attachment interactions influenced by monovalent cations and cationic surfactants from macro and molecular scales
    Wang, Shiwei
    Wang, Yuheng
    Kong, Rongjie
    ADVANCED POWDER TECHNOLOGY, 2024, 35 (07)
  • [23] Effect of negative inertial forces on bubble-particle collision via implementation of Schulze collision efficiency in general flotation rate constant equation
    Kouachi, Sabri
    Hassas, Behzad Vaziri
    Hassanzadeh, Ahmad
    Celik, Mehmet Sabri
    Bouhenguel, Mustapha
    COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2017, 517 : 72 - 83
  • [24] Bubble-particle collision efficiency in rotating dissolved air flotation in paper-recycling wastewater treatment: experiments and modeling
    Jelodar, Abbas Hasannattaj
    Rad, Hasan Amini
    Borghei, Seyed Mehdi
    Vossoughi, Manuchehr
    Rouhollahi, Rahmatollah
    DESALINATION AND WATER TREATMENT, 2022, 260 : 52 - 62
  • [25] Flotation separation of quartz from apatite and surface forces in bubble-particle interactions: Role of pH and cationic amine collector contents
    Han, Yosep
    Han, Seongsoo
    Kim, Byeongwoo
    Yang, Jiwon
    Choi, Junhyun
    Kim, Kwanho
    You, Kwang-Suk
    Kim, Hyunjung
    JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, 2019, 70 : 107 - 115
  • [26] The Stefan-Reynolds Model and the Modified Stefan-Reynolds Model for Studying Bubble-Particle Attachment Interactions in the Context of Flotation
    Zhou, You
    Albijanic, Boris
    Tadesse, Bogale
    Wang, Yuling
    Yang, Jianguo
    Zhu, Xiangnan
    LANGMUIR, 2019, 35 (12) : 4278 - 4286
  • [27] Proposition of a bubble-particle attachment model based on DLVO van der Waals and electric double layer interactions for froth flotation modelling
    Buchmann, Markus
    Oktem, Gulce
    Rudolph, Martin
    van den Boogaart, K. Gerald
    PHYSICOCHEMICAL PROBLEMS OF MINERAL PROCESSING, 2022, 58 (05):
  • [28] Extending the concept of machine acceleration used to model the bubble-particle detachment in flotation. Part 2-Machine acceleration of solid particles in water
    Duc Ngo-Cong
    Nguyen, Anh V.
    MINERALS ENGINEERING, 2020, 146
  • [29] Numerical investigation of particle breakage as applied to mechanical crushing - Part 1: Single-particle breakage
    Tang, CA
    Xu, XH
    Kou, SQ
    Lindqvist, PA
    Liu, HY
    INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2001, 38 (08) : 1147 - 1162
  • [30] A new method for assessing coarse particle flotation performance Part 2: Assessment of reproducibility using data from a mechanical cell
    Crompton, Luke J.
    Islam, Md. Tariqul
    Gibbs, Emma
    Galvin, Kevin P.
    MINERALS ENGINEERING, 2025, 224