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Dosing processes of bulk materials in modern technological operations require a higher degree of uniformity and lower ranges of productivity variation. A promising method of increasing the efficiency of the dosing process is the controlled vibro-liquefaction and sieving of loose material through a sieving perforated surface. Specifically designed, as part of the implementation process of the method, is a dispenser with a hopper, a perforated bottom zone loosening device with moving rods. The relevant methodology for grounding the parameters of this design analytical and experimental research. Developed, further, is mathematical model to help describe the nonlinear dynamics of bulk material passing through the holes of the perforated sieving surface, taking into account the structural and kinematic parameters of the loosening device, the structural parameters of perforation, and the properties of bulk materials. The results of the simulation revealed regular patterns of changes in the performance of the dispenser. Experimental studies were conducted to establish the ranges of variation in the properties of loose materials of biological origin, the patterns of changes in dosing productivity and uniformity, and to validate the adequacy of the mathematical model. Optimal parameters of the proposed dispenser were determined analytically and experimentally for the specified loose materials, including oscillation frequency, oscillation amplitude, and hole diameter of the perforated sieving surface, resulting in a productivity range of 1.8-5.9 t/h, and an unevenness of 2.6-2.9%. Attained, accordingly, is the methodology and grounded parameters of a promising type of dispenser with controlled vibro-discharge, in full consideration of the structural and kinematic parameters of the structure and the properties of loose materials.
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