Flow-field Numerical Simulation and the Application of Ultra-fine Stirred Mill
Ultra-fine Stirred Mill is a kind of high energy efficient equipment for ultra-fine grinding, and has been the mainstream equipment in the submicron powder and slurry industry. This paper mainly describes flow-field numerical simulation of the three popular ultra-fine grinding mills:(respectively as) Disc Stirred Mill, Pin Stirred Mill and Spiral Stirred Mill, by means of the software Computational Fluid Dynamics (CFD).In the flow-field numerical simulation, the velocity gradient, shear rate dispersion of the flow-field, the viscosity dissipation rate were analyzed with CFD. It is discovered that Pin Stirred Mill has the highest velocity gradient in circular directions and the most homogeneous distribution of shear rate among the three. Flow-field numerical simulation provides a new way (and means to) for the parameter optimization design and project enlargement of Ultra-fine Stirred Mill. The experiments were also carded out, the results are consistent with the results of the simulation analysis.For example, in GCC grinding experiments under the same conditions, the specific energy consumption of Pin Stirred Mill with 3600L in volume is 15%～17% less, and its processing capability is 13%～15% better than Disc Stirred Mill.Now with its optimized structure and excellent performances, more than ten sets Pin Stirred Mill with 3600L in volume have been used in industrial production in Shandong, Guangdong and Hunan province.
Ultra-fine Stirred Mill Numerical simulation Submicron powder Ground calcium carbonate
G. W. Zhang S. S. Huang
Department of Mineral Processing Engineering & Technology, Changsha Research Institute of Mining and School of Minerals Processing & Bioengineering, Central South University, Changsha, China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
667-675
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）