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Received September 23, 2002
Accepted February 7, 2003
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Ultra-Fine Grinding Mechanism of Inorganic Powders in a Stirred Ball Mill - Examination of Grinding Kinetics of Using Grinding Aids -
1Interdisciplinary Program in Powder Technology, Graduate School, Pusan National University, Busan 609-735, Korea 2Department of Pharmaceutical Manufacturing, Pusan National University, Busan 609-735, Korea
wschoi@pusan.ac.kr
Korean Journal of Chemical Engineering, July 2003, 20(4), 783-789(7), 10.1007/BF02706924
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Abstract
Recently, in various industrial processes, the need for fine particles, especially submicron-sized particles, has increased in the field of preparing raw powders such as fine ceramics and high value added products. Therefore, the research in fine grinding has gained more importance, especially, in submicron grinding. In the previous paper, a series of wet grinding experiments using inorganic powders by a stirred ball mill were performed. The grinding consumption power was measured, and the grinding rate constant, K, in the grinding kinetics equation was examined, based on a grinding kinetics analysis of experimental specific surface area with particle size distribution of ground products obtained under various grinding conditions. Also the effect of grinding aids on grinding rate constant K was investigated. It was confirmed that the grinding rate constant K, when using grinding aids improved by 1.95% and 25.6% for a 60 wt% and 70wt% slurry concentrate, respectively, when compared with the case of the absence of grinding aids. It was found that grinding aids have an important effect on increasing the grinding rate, especially for a slurry of high concentration.
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References
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Choi HK, Kwak EO, Kim SS, Choi WS, Pusal Bull. Pharm. Sci., 34, 17 (2000)
Choi WS, J. Soc. Powder Technol. Jpn., 33, 747 (1996)
Choi WS, Chung HY, Yoon BR, Kim SS, Powder Technol., 115(3), 209 (2001)
Gao MW, Forssberg E, Powder Technol., 84(2), 101 (1995)
Gao MW, Forssberg KSE, Weller KR, Int. J. Miner. Process., 44, 641 (1996)
Hasegawa M, Kimata M, Shimane M, Shoji T, Tsuruta M, Powder Technol., 114(1-3), 145 (2001)
Jimbo G, Chem. Eng. Jpn., 25, 117 (1992)
Kanda Y, Simodaira K, Kotake N, Abe Y, J. Soc. Powder Technol. Jpn., 35, 12 (1998)
Kim HS, Jung HY, So TS, Choi WS, "The Ultra Fine Grinding Mechanism of Inorganic Powers and Surface Modification in a Grinding Media Agitated Mill (1): Consideration on Specific Comminution Energy," Preprint of 36th Symposium on Powder Science and Technol., Japan, 170 (1998)
Kwade A, Powder Technol., 105(1-3), 14 (1999)
Lee SH, Lee DH, Kim SD, Korean J. Chem. Eng., 18(3), 387 (2001)
Park JK, Jeong Y, Yang JI, Jung MY, Korean J. Chem. Eng., 15(4), 375 (1998)
Kano J, Saito F, Powder Technol., 98(2), 166 (1998)
Shinohara K, Golman B, Uchiyama T, Otani M, Powder Technol., 103(3), 292 (1999)
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Wang Y, Forssberg E, "Dispersants in Stirred Ball Mill Grinding," KONA, No. 13, 67 (1995)
Zheng J, Harris CC, Somasundaran P, Powder Technol., 86(2), 171 (1996)
Zheng J, Harris CC, Somasundaran P, Powder Technol., 91(3), 173 (1997)
