Investigation of bubble-particle interactions in a mechanical flotation cell, part 1: Collision frequencies and efficiencies
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Darabi, Hossna
[1
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Koleini, S. M. Javad
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Tarbiat Modares Univ, Dept Mineral Proc, Tehran 1411511, IranTarbiat Modares Univ, Dept Mineral Proc, Tehran 1411511, Iran
Koleini, S. M. Javad
[1
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Deglon, David
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Univ Cape Town, Dept Chem Engn, Mineral Proc Res Unit, ZA-7700 Cape Town, South AfricaTarbiat Modares Univ, Dept Mineral Proc, Tehran 1411511, Iran
Deglon, David
[2
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Rezai, Bahram
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Amirkabir Univ Technol, Dept Min & Met Engn, Tehran 1591634311, IranTarbiat Modares Univ, Dept Mineral Proc, Tehran 1411511, Iran
Rezai, Bahram
[3
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Abdollahy, Mahmoud
[1
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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
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.
机构:
Larbi Ben Mhidi Univ, Appl Chem & Mat Technol Lab, Oeb 04000, AlgeriaLarbi Ben Mhidi Univ, Appl Chem & Mat Technol Lab, Oeb 04000, Algeria
Kouachi, Sabri
Hassas, Behzad Vaziri
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Univ Utah, Dept Met Engn, Coll Mines & Earth Sci, 135 South 1460 East,Rm 412, Salt Lake City, UT 84112 USALarbi Ben Mhidi Univ, Appl Chem & Mat Technol Lab, Oeb 04000, Algeria
Hassas, Behzad Vaziri
Hassanzadeh, Ahmad
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Istanbul Tech Univ, Fac Mines, Mineral Proc Engn Dept, TR-34469 Istanbul, TurkeyLarbi Ben Mhidi Univ, Appl Chem & Mat Technol Lab, Oeb 04000, Algeria
Hassanzadeh, Ahmad
Celik, Mehmet Sabri
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Istanbul Tech Univ, Fac Mines, Mineral Proc Engn Dept, TR-34469 Istanbul, TurkeyLarbi Ben Mhidi Univ, Appl Chem & Mat Technol Lab, Oeb 04000, Algeria
Celik, Mehmet Sabri
Bouhenguel, Mustapha
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Larbi Ben Mhidi Univ, Appl Chem & Mat Technol Lab, Oeb 04000, AlgeriaLarbi Ben Mhidi Univ, Appl Chem & Mat Technol Lab, Oeb 04000, Algeria
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Hanyang Univ, Dept Earth Resources & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South KoreaHanyang Univ, Dept Earth Resources & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea
Han, Yosep
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Han, Seongsoo
Kim, Byeongwoo
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Hanyang Univ, Dept Earth Resources & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South KoreaHanyang Univ, Dept Earth Resources & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea
Kim, Byeongwoo
Yang, Jiwon
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Hanyang Univ, Dept Earth Resources & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South KoreaHanyang Univ, Dept Earth Resources & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea
Yang, Jiwon
Choi, Junhyun
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Chonbuk Natl Univ, Dept Mineral Resources & Energy Engn, 567 Baekje Daero, Jeonju 54896, Jeonbuk, South KoreaHanyang Univ, Dept Earth Resources & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea
Choi, Junhyun
Kim, Kwanho
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Korea Inst Geosci & Mineral Resources KIGAM, 124 Gwahak Ro, Daejeon 34132, South KoreaHanyang Univ, Dept Earth Resources & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea
Kim, Kwanho
You, Kwang-Suk
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Korea Inst Geosci & Mineral Resources KIGAM, 124 Gwahak Ro, Daejeon 34132, South KoreaHanyang Univ, Dept Earth Resources & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea
You, Kwang-Suk
Kim, Hyunjung
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Chonbuk Natl Univ, Dept Mineral Resources & Energy Engn, 567 Baekje Daero, Jeonju 54896, Jeonbuk, South KoreaHanyang Univ, Dept Earth Resources & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea