Study on Fluidization Characteristics of Magnetically Fluidized Beds for Microfine Particles
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Experimental System and Research Methods
3. Results and Discussion
3.1. Magnetic Fluidization Characteristics of Microfine Particles
3.1.1. Effect of Magnetic Field Strength on Bed Pressure Drop
3.1.2. Effect of Adding Sequence of Magnetic Field on Bed Pressure drop
3.1.3. Effect of Magnetic Field Strength on the Minimum Fluidized Gas Velocity
3.2. Bed Expansion Rate
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
Abbreviations
μsHf2x | the magnetic energy possessed by the magnetic chain |
ρsUg2 | the kinetic energy possessed by the particles |
μs | the magnetic permeability of the ferromagnetic substance, its value is 1.256 × 10−6 H/m |
Hf | the magnetic field strength, A/m |
x | is the volume fraction of ferromagnetic substance, % |
ρs | is the density of the ferromagnetic substance, kg/m3 |
Ug | is the operating gas velocity, m/s |
N(r) | the total number of primary particles in a spherical domain of radius r |
D | the fractal dimension |
a | the radius of the particle, m |
dc | the length of the magnetic chain, m |
ρc | the density of the magnetic chain, Kg/m3 |
ρg | the density of air, Kg/m3 |
g | the acceleration of gravity, m/s2 |
μg | the air viscosity coefficient, s/m2 |
Appendix A
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Size Fraction (mm) | Content (%) |
---|---|
<0.01 | 6.84 |
0.01~0.02 | 7.04 |
0.02~0.03 | 32.98 |
0.03~0.045 | 47.52 |
>0.045 | 5.62 |
Total | 100.00 |
H (KA/m) | P0 (Pa) | Pm (Pa) | Recovery Time (s) |
---|---|---|---|
0 | 625 | 626 | / |
1 | 625 | 624 | 40 |
2 | 625 | 654 | 30 |
3 | 625 | 660 | 15 |
4 | 625 | 650 | 3 |
5 | 625 | 640 | <1 |
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Tian, Y.; Song, S.; Xu, X.; Wei, X.; Yan, S.; Zhan, M. Study on Fluidization Characteristics of Magnetically Fluidized Beds for Microfine Particles. Minerals 2022, 12, 61. https://doi.org/10.3390/min12010061
Tian Y, Song S, Xu X, Wei X, Yan S, Zhan M. Study on Fluidization Characteristics of Magnetically Fluidized Beds for Microfine Particles. Minerals. 2022; 12(1):61. https://doi.org/10.3390/min12010061
Chicago/Turabian StyleTian, Yakun, Shulei Song, Xuan Xu, Xinyu Wei, Shanwen Yan, and Mingzhe Zhan. 2022. "Study on Fluidization Characteristics of Magnetically Fluidized Beds for Microfine Particles" Minerals 12, no. 1: 61. https://doi.org/10.3390/min12010061