Attrition, Comminution and Breakage of Particulate Solids due to Impact Loads
By Prof. Haim Kalman, The Laboratory for Conveying and Handling of Paticulate Solids, Department of Mechanical Engineering Ben-Gurion University of the Negev, Beer Sheva, ISRAEL
On 5 October 2007 at 1.00-4.00 PM Room No. 4103, 10th Floor, Engineering Building No. 4, Faculty of Engineering, Chulalongkorn University, Bangkok
Abstract
Size reduction of solid particles is an important and widely used process technology in several industries: chemical, mining, pharmaceutical, metal, food and coal-fired power plants. The design of an efficiently operating system for this process is very difficult and can’t be achieved without first performing full-scale experimentation. This is mainly due to the complex phenomena involved in the operatiion, as well as to the inability to adequately characterize the strength of the solid particles.
An extensive experimental and theoretical investigation concerning the characterization of solid particle strength in various experimental apparatuses ( some of which are unique) will be presented. The presentation will be focused on the role of the comminution functions and the particles strength distribution in accurate size reduction simulations ( DEM-CED), which seems to be the only tool enabling in the future theoretical design and optimization of size reduction units. The comminution functions to be used in population balance models are: the selection function, the breakage function and the newly introduced fatigue function, which will be emphasized throughout the presentation.