This study investigated the effects of high temperature and combustion conditions on the attrition of fluidized material in a fluidized bed. Silica sand was fluidized in air at an atmospheric pressure between 873 K and 1,073 K. The operating parameters evaluated in investigating the attrition rate of fluidized material included particle size, temperature and both combustion and non-combustion conditions. Experimental results indicated that the total weight of attrition increased with increasing temperature and decreased with increasing particle size. The attrition was higher during the initial fluidization period than the later period, due to the loss of sharp corners and edges of the attrition particles. The initial and final attrition rates during combustion were higher than those in the non-combustion condition, because the heat and thermal shock were produced to increase attrition rate during incineration. Comparing the experimental data with previous correlations, that reveals a significant level of error in the prediction results from existing correlations. This error may occur because the experimental equations neglected the operating temperature and particle size.

Gas-solid Fluidized Bed Attrition Powder Combustion Incineration

Arena V, D'Amore M, Massimilla L, AIChE J., 29, 40 (1983) 
Chirone R, D'Amore M, Massimilla L, Mazza A, AIChE J., 31, 812 (1985) 
Choi KB, Park SI, Park YS, Sung SW, Lee DH, Korean J. Chem. Eng., 19(6), 1106 (2002)
Chu CY, Hsueh KW, Hwang SJ, J. Hazard. Mater., B80, 119 (2000) 
Cook JL, Khang SJ, Lee SK, Keener TC, Powder Technol., 89(1), 1 (1996) 
Geldart D, Powder Technol., 7, 285 (1973) 
Gu JH, Yeo WH, Seo YC, Lee SH, Lee JK, Korean J. Chem. Eng., 19(2), 324 (2002)
Gwyn JE, AIChE J., 15, 35 (1969) 
Halder PK, Basu P, Chem. Eng. Sci., 47, 527 (1992) 
Han KH, Park J, Ryu JI, Jin GT, Korean J. Chem. Eng., 16(6), 804 (1999)
Jang JG, Kim MR, Lee KH, Lee JK, Korean J. Chem. Eng., 19(6), 1059 (2002)
Kage H, Dohzaki M, Ogura H, Matsuno Y, Korean J. Chem. Eng., 16(5), 630 (1999)
Ko MK, Lee WY, Kim SB, Lee KW, Chun HS, Korean J. Chem. Eng., 18(6), 961 (2001)
Kono H, AIChE Symp. Ser., 77, 96 (1981)
Lee SK, Jiang X, Keener TC, Khang SJ, Ind. Eng. Chem. Res., 32, 2758 (1993) 
Lee WJ, Kim SD, Song BH, Korean J. Chem. Eng., 19(6), 1091 (2002)
Lin L, Sesrs JT, Wen CY, Powder Technol., 27, 105 (1980) 
Merrick D, Highley J, AIChE Symp. Ser., 70, 366 (1974)
Park YS, Kim HS, Shun D, Song KS, Kang SK, Korean J. Chem. Eng., 17(3), 284 (2000)
Patel K, Nienow AW, Milne LP, Powder Technol., 47, 257 (1986) 
Ray YC, Jiang TS, Powder Technol., 49, 193 (1987) 
Shamlou PA, Liu Z, Yates JG, Chem. Eng. Sci., 45, 809 (1990) 
Ulerich NH, Vaux RA, Newby RA, Keairns DL, Experimental/Engineering Support for EPA's PBC Program, Final Rep., EPA-600/7-80-015A, Westinghouse Research and Development Center, Pittsburgh, PA, USA, Jan. (1980)
Vaux WG, Fellers AW, AIChE Symp. Ser., 77, 107 (1981)
Vaux WG, Kearins DL, "Fluidization," Grace, J.R. and Matsen, J.M., Eds., Plenum Press, New York, 437 (1980)
Vaux WG, Schruben JS, AIChE J., 79, 97 (1978)
Wey MY, Chang CL, Polym. Degrad. Stabil., 48, 25 (1995) 
Wu SY, Baeyens J, Powder Technol., 67, 217 (1991) 
Wu SY, Chu CY, "Attrition in a Gas Fluidized Bed with Single High Velocities Vertical Nozzle," World Congress on Particle Technology 3rd, Brighton, U.K., 152 (1998)
Wu SY, Baeyens J, Chu CY, Can. J. Chem. Eng., 77(4), 738 (1999)