文献类型：期刊文献

英文题名：Study on the non-linear ultra-fine grinding kinetics of calcium carbonate in stirred mill

作者：Chen, D. W.[1];Ge, X. L.[1];Shi, Q.[2];Tian, Y.[2]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Shanghai Dongsheng New Mat Co Ltd, Shanghai 200233, Peoples R China

年份：2015

卷号：19

起止页码：999

外文期刊名：MATERIALS RESEARCH INNOVATIONS

收录：;EI(收录号：20153801278547);WOS:【SCI-EXPANDED(收录号:WOS:000355379900192)】；

基金：This work was supported by the Little Giant Project of Shanghai Science and Technology (No. 10HX1173000), and also supported by Shanghai Hualy New Superfines Co. Ltd, and Shanghai Dongsheng New Materials Co., Ltd.

语种：英文

外文关键词：Particle size; Calcium carbonate; Ultra-fine grinding kinetics; Stirred mill; Population balance equation

摘要：Ultra-fine calcium carbonate is widely used in construction, manufacturing and other fields. Ultrafine grinding is the central preparation technology of calcium carbonate powder in recent years. A new ultra-fine grinding kinetics model has been developed for the wet stirred mill by using population balance equation, and the non-first-order breakage kinetics has been demonstrated. The transition from the dominant mechanism of particle breakage to the balanced state of breakage, that is, aggregation and disaggregation, is investigated, which can be treated as the optimal operating conditions for the whole process. Moreover, compared with the measured size distribution of the products, the simulated values by the new kinetics equation are more accurate to predict the products. The optimal grinding time of calcium carbonate by the laboratory wet stirred mill is about 2 h. This investigation is valuable to the simulation and optimisation of the industrial ultra-fine grinding processes of calcium carbonate materials.