Kuznetsova M. Theoretical and experimental research of hard materials grinding process in a ball mill.

Object of research: the grinding processes of hard materials in a ball mill. Objective: to create a scientifically based theory of calculation of the grinding process optimal parameters, which provide lower energy costs and the maximum efficiency of a ball mill. Methods: the theoretical foundations of the work based on the principles of physics and the theory of strength fracture of solids. Methods of mathematical modeling was used. Study the degree of crushing material in a ball mill were performed using sieve analysis and the method of Kozeny-Carman breathability. Theoretical and practical results: further developing the theory of determining energy grinding process hard materials, developing a method of determining an energy-efficient mode of operation of the ball mill during grinding of solid materials with desired physical and mechanical properties, designing mill realizing aimed kick. Novelty: the first time the dependence of the critical speed of rotation of the drum mill on the characteristics of the grinding process, and physical and mathematical model of energy efficiency of grinding in a ball mill were created, which adequately describes the experimental data; scientifically based definition of grinding mode, corresponding to the high efficiency; developed and tested a method for comparative evaluation of energy efficiency calculated mode of operation of the ball mill. The degree of implementation: the results had implemented: the company ООО "Скала-2006", Ltd. ООО "ВНИИСТРОМ-НВ". The results of the use in the educational process. Field of Application: chemical, processing, construction industry of Ukraine