536 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
and backward bins were measured and the size distribution
of each collection were analyzed by the Mastersizer.
An operating frequency of 350 Hz was tested. The size
distribution in the forward and backward collection of the
first and second run of experiments, represented by differ-
ent lines (1st run and 2nd run), are compared in Figure 11
Backward collection is the same as coarse particle size dis-
tribution. Forward collection size distribution tends toward
fine but is coarser than the initial fine sample particle size
distribution. The close agreement of the results of different
runs of experiments shows a strong reproducibility.
CONCLUSIONS
An ETW system was developed to explore the relation-
ship between particle transport direction, particle size and
frequency. Single particle experiment was first introduced.
The results clearly present the effect of particle size and fre-
quency on the motion directions. In addition, the effect of
frequency on moving speed is quantitatively analyzed. A
crossover frequency was found and defined, at which a par-
ticle is equally likely to move along or against the traveling
wave. This critical frequency decreases as the particle size
increases. We can use this parameter as a baseline to adjust
upward or downward to select the appropriate frequencies
to separate particles by size. Based on the observations and
conclusions, the separation for ballotini particles with dif-
ferent sizes have been tested and shown good performance.
REFERENCE
Barry A. Wills, T. N.-M. 2006. Mineral Processing
Technology, Elsevier Science &Technology Books.
Borm, P. J. 1997. Toxicity and occupational health hazards
of coal fly ash (CFA). A review of data and comparison
to coal mine dust. The Annals of occupational hygiene,
41, 659–676.
Hirajima, T., Petrus, H. T. B. M., Oosako, Y., et al., 2010.
Recovery of cenospheres from coal fly ash using a dry
separation process: Separation estimation and potential
application. International Journal of Mineral Processing,
95, 18–24.
Kawamoto, H. and Tsuji, K. 2011. Manipulation of small
particles utilizing electrostatic force. Advanced Powder
Technology, 22, 602–607.
Machowski, W., Balachandran, W. and Hu, D. 1995.
Influence of electrode geometry on transport and
separation efficiency of powders using traveling wave
field technique. IEEE Industry Applications Conference
Thirtieth IAS Annual Meeting.
Masuda, S., Washizu, M. and Iwadare, M. 1987. Separation
of Small Particles Suspended in Liquid by Nonuniform
Traveling Field. IEEE Transactions on Industry
Applications, 23, 474–480.
Masuda, S., Washizu, M. and Kawabata, I. 1988. Movement
of Blood Cells in Liquid by Nonuniform Traveling
field. IEEE Transactions on Industry Applications, 24,
217–222.
Figure 11. Particle separation results at 350 Hz
and backward bins were measured and the size distribution
of each collection were analyzed by the Mastersizer.
An operating frequency of 350 Hz was tested. The size
distribution in the forward and backward collection of the
first and second run of experiments, represented by differ-
ent lines (1st run and 2nd run), are compared in Figure 11
Backward collection is the same as coarse particle size dis-
tribution. Forward collection size distribution tends toward
fine but is coarser than the initial fine sample particle size
distribution. The close agreement of the results of different
runs of experiments shows a strong reproducibility.
CONCLUSIONS
An ETW system was developed to explore the relation-
ship between particle transport direction, particle size and
frequency. Single particle experiment was first introduced.
The results clearly present the effect of particle size and fre-
quency on the motion directions. In addition, the effect of
frequency on moving speed is quantitatively analyzed. A
crossover frequency was found and defined, at which a par-
ticle is equally likely to move along or against the traveling
wave. This critical frequency decreases as the particle size
increases. We can use this parameter as a baseline to adjust
upward or downward to select the appropriate frequencies
to separate particles by size. Based on the observations and
conclusions, the separation for ballotini particles with dif-
ferent sizes have been tested and shown good performance.
REFERENCE
Barry A. Wills, T. N.-M. 2006. Mineral Processing
Technology, Elsevier Science &Technology Books.
Borm, P. J. 1997. Toxicity and occupational health hazards
of coal fly ash (CFA). A review of data and comparison
to coal mine dust. The Annals of occupational hygiene,
41, 659–676.
Hirajima, T., Petrus, H. T. B. M., Oosako, Y., et al., 2010.
Recovery of cenospheres from coal fly ash using a dry
separation process: Separation estimation and potential
application. International Journal of Mineral Processing,
95, 18–24.
Kawamoto, H. and Tsuji, K. 2011. Manipulation of small
particles utilizing electrostatic force. Advanced Powder
Technology, 22, 602–607.
Machowski, W., Balachandran, W. and Hu, D. 1995.
Influence of electrode geometry on transport and
separation efficiency of powders using traveling wave
field technique. IEEE Industry Applications Conference
Thirtieth IAS Annual Meeting.
Masuda, S., Washizu, M. and Iwadare, M. 1987. Separation
of Small Particles Suspended in Liquid by Nonuniform
Traveling Field. IEEE Transactions on Industry
Applications, 23, 474–480.
Masuda, S., Washizu, M. and Kawabata, I. 1988. Movement
of Blood Cells in Liquid by Nonuniform Traveling
field. IEEE Transactions on Industry Applications, 24,
217–222.
Figure 11. Particle separation results at 350 Hz