Researches of Air Classification of Bulk Materials in Dry Grinding Aggregates in the Two-Stage Separator
R. I. Rybalko, A. K. Kralin
Donbas National Academy of Civil Engineering and Architecture
Annotation: Workflows classification of bulk materials in grinding dry grinding units has been analyzed. For this reason, we proposed a new type of two-stage separator of increased efficiency, having homogeneity adjusting fractional composition of material by the effect of turbulence in the separation zone. The interaction of the working bodies of the machine with the particles of the material has been considered; the mechanism of evolution of turbulent structures of two-phase flow has been studied; dependence of interaction of the airflow with the individual particles of the crushed material has been determined; the character of the distribution of the concentration of particles of different fractions depending on the aerodynamic characteristics of the machine elements has been studied. The main results of experimental studies of air separation of bulk materials in a new two-stage separator on the laboratory bench and advanced industrial designs have been given. The effect of the two-phase flow rate, the size of the lattice design of large-scale extinction vortex structures and division borders on separation efficiency have been analyzed. An expression for the equilibrium particle diameter, which is the conditional measure of the ratio of the mass and aerodynamic force at the point of flow has been achieved. Found vortex radius value after passing the grille has been found out. The basic aerodynamic parameters, considered separator design have been determined, it has been concluded that it is worked.
Keywords: dry bulk materials, air classification, separator, air flow.
Pages: 59-69.
Link for citation: Rybalko, R. I.; Kralin, A. K. Researches of Air Classification of Bulk Materials in Dry Grinding Aggregates in the Two-Stage Separator. – Text : electronic. – In: Modern Industrial and Civil Construction. – 2016. – Vol. 12, N 2. – Р. 59-69. – URL: https://donnasa.ru/publish_house/journals/spgs/2016-2/02_rybalko_kralin.pdf (date of access: 16.09.2024). (in Russian)
Vol. 12, N 2 (2016)Journal: Modern Industrial and Civil Construction
Publish house: Donbas National Academy of Civil Engineering and Architecture