Presentation Information
[MIS19-01]Innovative Particle Separation System Based on Granular Physics★Invited Papers
*Shusaku Harada1 (1.Hokkaido University)
Keywords:
Granular Physics,Segregation,Separation,Fluidization
We have developed a continuous particle separation system based on unique behavior of granular materials. The system is an innovative technology combining two physically-unexpected behaviors of granular materials, which have been highlighted as physically interesting in the last quarter century. The first is “inverse segregation”, which occurs when the density-different particles is subjected to vertical vibration and light particles accumulate at the bottom and heavy particles accumulate at the top [1-4]. The second is “sudden fluidization”, i.e., fine particles with poor flowability behave like water [5-7]. These phenomena enable the continuous separation of fine particles of different densities with poor flowability. Using the developed system, it is possible to separate fine particles as small as 100 μm, which is difficult to separate using conventional dry separation techniques. Furthermore, the mechanism is quite simpler than conventional particle separation methods because it does not require the usage of water or air inflow. It is expected to make a significant contribution to solving the problems of conventional density separation, which is used in a wide range of engineering fields.
References
[1] Burtally, N., King, P. J. and Swift, M. R., Spontaneous Air-Driven Separation in Vertically Vibrated Fine Granular Mixtures, Science, 295 (2003) 1877-1879.
[2] Burtally, N., King, P. J., Swift, M. R. and Leaper, M., Dynamical Behaviour of Fine Granular Glass/Bronze Mixtures Under Vertical Vibration, Gran. Matt., 5 (2003) 57-66.
[3] Zeilstra, C., van der Hoef, M. A. and Kuipers, J. A. M., Simulation of Density Segregation in Vibrated Beds, Phys. Rev. E, 77 (2008) 031309.
[4] Konno, H., Katayama, T., Harada, S. and Ogata, K., Mechanism of Inverse and Sandwich Segregations in a Vibrated Particle Bed, Phys. Rev. E, 112 (2025) 015408.
[5] Rathbone, T., Nedderman, R. M. and Davidson, J. F., Aeration, Deaeration, and Flooding of Fine Particles, Chem. Eng. Sci., 42, (1987) 725-736.
[6] Tomita, Y., Ikeuchi, H., Kuchii, S. and Funatsu, K., Flooding (''Flushing'') of Powder through a Small Orifice by an External Load, J. Rheol., 38 (1994) 231-240.
[7] Harada, S., Li, H., Funatsu, K. and Tomita, Y., Spouting of Fine Powder from Vertically Vibrated Bed, Chem. Eng. Sci., 57 (2002) 779-787.
References
[1] Burtally, N., King, P. J. and Swift, M. R., Spontaneous Air-Driven Separation in Vertically Vibrated Fine Granular Mixtures, Science, 295 (2003) 1877-1879.
[2] Burtally, N., King, P. J., Swift, M. R. and Leaper, M., Dynamical Behaviour of Fine Granular Glass/Bronze Mixtures Under Vertical Vibration, Gran. Matt., 5 (2003) 57-66.
[3] Zeilstra, C., van der Hoef, M. A. and Kuipers, J. A. M., Simulation of Density Segregation in Vibrated Beds, Phys. Rev. E, 77 (2008) 031309.
[4] Konno, H., Katayama, T., Harada, S. and Ogata, K., Mechanism of Inverse and Sandwich Segregations in a Vibrated Particle Bed, Phys. Rev. E, 112 (2025) 015408.
[5] Rathbone, T., Nedderman, R. M. and Davidson, J. F., Aeration, Deaeration, and Flooding of Fine Particles, Chem. Eng. Sci., 42, (1987) 725-736.
[6] Tomita, Y., Ikeuchi, H., Kuchii, S. and Funatsu, K., Flooding (''Flushing'') of Powder through a Small Orifice by an External Load, J. Rheol., 38 (1994) 231-240.
[7] Harada, S., Li, H., Funatsu, K. and Tomita, Y., Spouting of Fine Powder from Vertically Vibrated Bed, Chem. Eng. Sci., 57 (2002) 779-787.