MATHEMATICAL MODELING OF THE GRINDING PROCESS WITH SIMULTANEOUS DRYING OF THE MATERIAL IN A CENTRIFUGAL MILL
Journal Title: Комп’ютерне моделювання: аналіз, управління, оптимізація - Year 2019, Vol 1, Issue 1
Abstract
In this work, the relevant task of obtaining a mathematical description of the process of material grinding in a centrifugal mill with simultaneous drying of the material is considered. The study of the drying process with simultaneous grinding showed not only its versatility in processing a wide variety of materials, but also almost instantaneous removal of most of the moisture. In this case, drying is intensified due to not only the rapid development of the contact surface, but also the active mixing of air and material, as well as due to the more rapid evaporation of moisture from freshly formed surfaces. The grinding of materials in centrifugal mills, especially fine grinding, is accompanied by a significant heat release, which allows the material to be dried simultaneously with grinding. The formation of heat in the working areas of this type of grinders happens due to following factors: air and material friction on work items, turbulence in the dust-gas mixture, emergence of new surfaces during fracture, repeated compression of the dust-gas mixture, etc. Reducing the moisture content of the crushed product is a prerequisite for further use in production, for which additional drying equipment is used. On the other hand, excessive temperature increase during grinding is undesirable for many materials, as it can lead to deterioration of the product quality, and also leads to the creation of an explosive situation. The obtained mathematical model makes it possible to predict the operation of the shredder and determine the values of input quantities to obtain a high-quality grinded product with a required final humidity. The article presents the heat balance of a centrifugal mill. Mathematical dependences are given for calculating the specific heat consumption and temperature of the dust-gas mixture at the exit from the centrifugal mill. Experimental dependences on the influence of technological parameters on the temperature of the dust-gas mixture, confirming the results of theoretical studies, are obtained
Authors and Affiliations
Е. В. Титова, В. И. Кравец, Н. А. Минакова, Е. Н. Гнатко
Keywords
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- EP ID EP642557
- DOI 10.32434/2521-6406-2019-5-1-70-74
- Views 125
- Downloads 0
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