Theoretical description of the process of separation of grain material particles

The article presents data comparing the theoretical description of the process of sieving different particles of grain material through the sieve, installed in the cascade under different methods of feeding the initial grain.The grain material is divided into equal parts by a cascade of short sieves with large cells. Feeding is carried out at the beginning of the sieves in the "vertical loading" cascade and in the usual way, i.e. feeding to the upper sieve of the sieves cascade. Studies showed that the necessary efficiency of cleaning from fine and short impurities with the usual supply of grain material is carried out on a cascade of sieves of 20 tiers. When feeding grain material to the beginning of the "vertical loading" sieves, high cleaning efficiency is achieved by installing 12 tiers of sieves. The efficiency of the cleaning in the first and in the second case was 92 %. Experimental data confirmed the possibility of reducing the number of tiers of sieves by 35-42 % with "vertical loading" of grain material, which will reduce the metal consumption of the structure and the cost of the device.