EFFECTIVE COMMINUTION OF DIATOMACEOUS EARTH IN A VERTICAL TYPE JET MILL

Yoon SH; Kim SD; Kang Y; Kim YJ; Cho SH

Korean Journal of Chemical Engineering, Vol.12, No.4, 436-441, September, 1995

Comminution characteristics of diatomaceous earth have been investigated in a vertical type jet mill of pilot plant scale; the diameter of the chamber of mill is 26.3cm. Fluidization of the particles in the chamber has been proposed to enhance the comminution efficiency of the jet mill by promoting the effective contacting of powders with compressed air as well as the chamber wall. Effects of the pressures or densities of pulverizing-air and fluidizing-air and comminution time on the mean size of the particles and the rate of comminution have been examined. The statistical analysis of pressure fluctuations in the chamber of the mill has been utilized to predict the characteristics of the vertical-type jet mill taking advantage of the fluidization technique. The particle size and comminution rate have been correlated with the operating variables, respectively.

Keywords:Comminution;Vertical Type Jet Mill;Fluidization;Statistical Analysis

[References]

Alicatore AF, Neu EL, Chem. Eng. Prog., 67, 49 (1971)
Basso AJ, Chem. Eng., 89, 159 (1982)
Bendat JS, Piersol AG, "Engineering Applications of Correlations and Spectral Analysis," Wiley, N.Y. (1980)
Culver RH, Chem. Eng. Prog., 71, 51 (1975)
Fan LT, Kang Y, Neogi D, Yashima M, AIChE J., 39, 513 (1993)
Hendry R, "A Mathematical Model for Fluid Energy Mills," Dechema Monograph, Band 57, Verlag Chemie, 695 (1967)
Honma T, Hasegawa M, Kanda Y, J. Chem. Eng. Jpn., 15, 240 (1982)
Honma T, Hasegawa M, Kanda Y, J. Chem. Eng. Jpn., 17, 221 (1984)
Ito H, "Scale-up Theory of Single Track Jet Mill," Proc. of the 2nd Korea-Japan Powder Technol. Symp., 63 (1987)
Kang Y, Min BT, Ko MH, Kim SD, HWAHAK KONGHAK, 32(1), 58 (1994)
Menyhart M, Miskiewicz L, Powder Technol., 15, 261 (1976)
Mori Y, "Studies an Jet Pulverizing," Dechema Zerkleinern Symp., 515 (1965)
Ramanujam M, Vankateswarlu D, Powder Technol., 3, 92 (1969)
Yoon SH, Kang Y, Cho SH, "Development of Fluidized Bed Energy Mill," Report to the Ministry of Commerce and Industry, Korea (1989)
Yoon SH, Kang Y, Cho SH, "Scale-up of Fluid Energy Mill in the University," Proc. 2nd World Congress of Particle Technol., Kyoto, Japan, 401 (1990)
Yoon SH, Kang Y, Cho SH, Kim SD, "Diatomite-Filteraid Manufacturing Process Improvement by Jet Grinding," Proc. 6th World Filtration Confress, Nagoya, Japan, 133 (1993)
Yoon SH, Kim SD, Kang Y, Cho SH, "Statistical Analysis of Pressure Fluctuations in a Fluidized Bed Energy Mill," Proc. of 4th Asian Conference on Fluidized Beds and Three-Phase Reactors, 37, Kyushu, Japan (1994)

[Referenced By]

[1] Alicatore AF, Neu EL, Chem. Eng. Prog., 67, 49 (1971)

[2] Basso AJ, Chem. Eng., 89, 159 (1982)

[3] Bendat JS, Piersol AG, "Engineering Applications of Correlations and Spectral Analysis," Wiley, N.Y. (1980)

[4] Culver RH, Chem. Eng. Prog., 71, 51 (1975)

[5] Fan LT, Kang Y, Neogi D, Yashima M, AIChE J., 39, 513 (1993)

[6] Hendry R, "A Mathematical Model for Fluid Energy Mills," Dechema Monograph, Band 57, Verlag Chemie, 695 (1967)

[7] Honma T, Hasegawa M, Kanda Y, J. Chem. Eng. Jpn., 15, 240 (1982)

[8] Honma T, Hasegawa M, Kanda Y, J. Chem. Eng. Jpn., 17, 221 (1984)

[9] Ito H, "Scale-up Theory of Single Track Jet Mill," Proc. of the 2nd Korea-Japan Powder Technol. Symp., 63 (1987)

[10] Kang Y, Min BT, Ko MH, Kim SD, HWAHAK KONGHAK, 32(1), 58 (1994)

[11] Menyhart M, Miskiewicz L, Powder Technol., 15, 261 (1976)

[12] Mori Y, "Studies an Jet Pulverizing," Dechema Zerkleinern Symp., 515 (1965)

[13] Ramanujam M, Vankateswarlu D, Powder Technol., 3, 92 (1969)

[14] Yoon SH, Kang Y, Cho SH, "Development of Fluidized Bed Energy Mill," Report to the Ministry of Commerce and Industry, Korea (1989)

[15] Yoon SH, Kang Y, Cho SH, "Scale-up of Fluid Energy Mill in the University," Proc. 2nd World Congress of Particle Technol., Kyoto, Japan, 401 (1990)

[16] Yoon SH, Kang Y, Cho SH, Kim SD, "Diatomite-Filteraid Manufacturing Process Improvement by Jet Grinding," Proc. 6th World Filtration Confress, Nagoya, Japan, 133 (1993)

[17] Yoon SH, Kim SD, Kang Y, Cho SH, "Statistical Analysis of Pressure Fluctuations in a Fluidized Bed Energy Mill," Proc. of 4th Asian Conference on Fluidized Beds and Three-Phase Reactors, 37, Kyushu, Japan (1994)