분체공학 , 유동층 , 고분자 , 재료 ( 무기 , 유기 ) : 매체교반형 미분쇄기에 의한 무기분말의 초미분쇄 기구에 관한 연구 = Powder Technology , Fluidized Bed , Polymers , Materials ( Inorganics , Organics ) : The Ultra - fine Grinding Mechanism of Inorganic Powders in a Stirred Ball Mill

다국어 초록 (Multilingual Abstract)

Recently in various industrial processes, the need for fine particles especially submicron particles has been increased in preparation field of raw powders such as fine ceramics and high technical products. The grinding by a stirred ball mill to submicron range has been achieved commercially in many cases. A series of grinding experiments using a vertical stirred grinding media mill and inorganic powders such as calcite, pyrophyllite and talc as test samples were carried out to clarify the grinding mechanism of the stirred grinding media mill. The effect of experimental conditions such rotation speed of stirrer, ball filling ratio, ball diameter and slurry concentration on the power inputted in the stirred media mill were measured and the quantitative relationship between them was proposed with multiple regression analysis. The relationship between the experimental factors and the comminution consumption power could also be regressed as a power-law and effect of grinding aids on particle size distribution and on grinding efficiency defined as the increase of specific surface area per the specific grinding consumed energy was investigated. In this study it can be concluded that the grinding energy efficiency using grinding aids was improved about 13.1% than no aids experiment. And the effect of grinding aids on grinding rate constant K was investigated. Also the relationship between grinding rate constant K and experimental conditions including the effect of grinding aids was examined and it is confirm that the grinding rate can be improved in the degree of the maximum of 25.6% compared with without grinding aids.