Abstract
Based on an analysis of the thermal and the electrophysical characteristics of a fluidization bed with dielectric clay particles, a method has been developed of distending such particles by means of a high-frequency electric field for the production of ceramic sand.
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Abbreviations
- R, r:
-
radius of a grain and the radius to any inside point
- T(r):
-
temperature inside a grain
- Tc :
-
temperature at the grain center
- Ts :
-
temperature at the grain surface
- T0 :
-
ambient temperature
- τ :
-
time coordinate
- τ 0 :
-
time of temperature leveling inside a grain
- τ a :
-
time of temperature leveling between grain and ambient medium
- λ:
-
thermal conductivity of grain material
- cγ:
-
specific heat in terms of volume of grain material
- λG :
-
thermal conductivity of gas
- α :
-
heat transfer coefficient
- q:
-
volume rate of heat generation
- ε′:
-
dielectric permittivity of grain material
- f:
-
frequency of high-frequency electric field
- Em :
-
amplitude of high-frequency electric field
- tanδ :
-
loss tangent of grain material
- C:
-
capacitance of effective capacitor with fluidized bed
- Cm :
-
mean effective capacitance
- C0 :
-
capacitance of effective capacitor with stationary bed
- D, H:
-
diameter and height of reactor
- h:
-
height of fluidized bed
- m=h0/H:
-
relative initial fill of a reactor
- w:
-
linear velocity of gas stream
Literature cited
S. P. Onatskii, Production of Ceramic Sand [in Russian], Izd. ASKA, Moscow (1962).
V. V. Samodurov, Ceramic Sand [in Russian], Izd. Znanie, Moscow (1966).
P. P. Budnikov, A. I. Polinkovskaya, G. A. Petrikhina, and A. A. Benui, Stroit. Mater., No. 9 (1959).
K. I. Bashlai et al., Authors' Certif. No. 238,390 on Patent Appl. No. 896183/28-14, April 21, 1964, Byull. Izobret., No. 9 (1969).
O. M. Todes, S. A. Gel'man, A. L. Cheremskii, and V. M. Stanyakin, Brief Reports All-Union Sci. -Tech. Confer. on the Study of Heat and Mass Transfer Processes in a Fluidization Bed [in Russian], Ivanovo (1969), p. 145.
O. M. Todes, S. A. Gel'man, and A. L. Cheremskii, Trans. Sixth Leningrad Confer. on Concrete and Reinforced Concrete [in Russian], Stroiizdat (1970), p. 163.
V. I. Odelevskii, Zh. Tekh. Fiz.,21, No. 6 (1951).
M. É. Aérov and O. M. Todes, Hydraulic and Thermal Operating Principles of Apparatus with a Stationary and a Fluidized Granular Bed [in Russian], Izd. Khimiya, Leningrad (1968).
K. I. Bashlai et al., Authors' Certif. No. 316,912 on Patent Appl. No. 1244686/29-33, May 22, 1968, Byull. Izobret., No. 30 (1971).
Additional information
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 22, No. 6, pp. 969–975, June, 1972.
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Bashlai, K.I., Barantsev, I.F., Grinbaum, M.B. et al. Thermal and electrical characteristics of a high-frequency electrothermal fluidization bed. Journal of Engineering Physics 22, 665–669 (1972). https://doi.org/10.1007/BF00822967
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DOI: https://doi.org/10.1007/BF00822967