Optimization mathematical models of raw material crushing in the production of compound feeds based on enriching feed concentrate

The use of compound feeds allows to balance the animal needs for nutrients and biologically active substances. It is known that in this case, animal productivity increases by more than 15 ... 20%, feed consumption per unit of production decreases, and product quality increases. Expanding the range of compound feeds due to the large number of raw materials used, the technological process of their production is significantly complicated. In order to obtain optimization mathematical models of the processes of multicomponent raw material grinding, factor experiments were conducted on crushers U1-EML and DDM. The input parameters (factors) were the diameters of the sieve holes in the grinder and the content of feed enrichment concentrates in the crushed mixtures. As output parameters (response functions) for all factor experiments are accepted: the modulus of fineness of the grinding products (M), the amount of fine fraction in the grinding products (P), energy consumption for grinding (E). At mixed-feed plants with a two-stage production method, the by-products of processing enterprises - oilcake, meal, bran, - it is advisable to introduce as part of the feed enrichment concentrate (FEC). A complete factorial experiment of type 2² was carried out on the U1-EML grinder. The controlled (variable) factors were: the content of the feed enrichment concentrate in the crushed mixtures; the diameter of the sieve holes of the grinder in the first stage. At the second stage of grinding in all experiments, a sieve with a diameter of 3 mm was installed in the crusher (an uncontrolled factor). The installation of other sieves is impractical due to technological requirements (the small difference in the size of the grinding products).