The study was carried out on two mixers of different designs: basic and developed. To evaluate and analyze the finished mixture, the method of high performance liquid chromatography was used. Taurine was used as a key component. The paper describes how the rational parameters of the mixer were selected, according to which recipes the mixture was prepared, and also how the final assessment of the effectiveness of the mixing equipment was carried out. The mixtures were prepared on the equipment according to three recipes. According to the first recipe, 81 experiments were carried out, with various parameters of the mixer operation, which helped to determine their rational value. For two different mixers, they turned out to be identical, so further mixing took place with the same parameters. Based on the data obtained, graphs of dependences were built, which clearly demonstrated the difference in the obtained values of the coefficient of heterogeneity. And they made it possible to judge the influence of each individual parameter. The developed mixer design showed a lower coefficient of heterogeneity in comparison with the base one. It did not exceed 10%, unlike the latter.

The results of a study of the flowability of finely divided dry materials and mixtures depending on the diameter of the particles and their density are presented, the influence of the mechanical effect and the physicomechanical properties of the materials on the flowability are determined. A mathematical model is constructed that allows one to functionally evaluate the dependence of flowability on the physicomechanical characteristics of the material under study by the method of multiple regression analysis. Polynomial equations are obtained that describe the influence of the flow area, physical and mechanical properties on the flowability of various materials and mixtures. A flowability criterion is proposed that describes the motion of various materials under the action of inertia forces. Partial and universal criteria equations are obtained that describe the energy expenditures for mixing bulk materials

Introduction. Semi-finished products help food industry enterprises to meet the population’s need for high-quality and nutritious foods. Popular semi-products are loose mixes enriched with vitamins, minerals, and biologically active substances. The world is currently experiencing a shortage of food protein, and its deficiency is likely to continue in the coming decades. Therefore, loose high-protein baking mixes are one of the promising directions of healthy nutrition industry. Multicomponency of such mixes makes it possible to balance their composition and develop products that have a useful comprehensive effect on the human body and strengthen protective functions. Study objects and methods. In order to ensure a balanced composition of mixes and high-quality food production, the authors propose a new design of a continuous action vibration mixer. Experimental and industrial tests were carried out as part of a technological line for production of baking mixes with increased protein content. Trials included idling and serviceability check under load, quality tests of the obtained high-protein baking mix, as well as vibration and noise level tests. The tests provided the following rational operation parameters: amplitude of vibration A = 0.0045 m; angle of vibration β = 45°; frequency of vibration f = 33.33 Hz; number of revolutions n = 4; diameter of perforations d = 0.007 m. Biological value was determined according to the results of amino-acid analysis. Results and discussion. The new mixing unit had the average value of the non-uniformity coefficient Vc = 6.86%, which indicated the high quality of the obtained high-protein baking mixes. The biological value of the finished food product showed a higher nutritional value than in the control sample. Conclusions. The new vibration type mixing unit made it possible to obtain baking mixes of specified quality at the ratio of mixed components 1:60. This simple but reliable device had relatively low material and energy costs.