Abstract
Due to dust formation, labour conditions while producing feed compounds are often out of compliance with regulatory requirements. Dust is released at all stages of feed milling, particularly, during reception of raw material. Here, dust concentration is such that explosive mixtures can be formed. The work aims to theoretically justify improvements in labour conditions at receiving points of compound feed milling enterprises. The article accounts for the dust concentration and particle-size ratios, what provides a rationale for computing efficiency of dust-removal system. Harmful effect of dust on operators depends on its amount in the workplace air. The scheme of dust formation and removal at the feed milling enterprise receiving point has been designed. A methodology for determining the probability of an operator’s staying in harmful working environment has been proposed. The structure of dust-removal system has been defined for specific conditions. Installation of enclosures for receiving bunker changes the spatial angle, that constrains discharge from the dust-removal system. The sharper the spatial angle, the higher the airspeed created by the dust-removal system near unloading area, though the structure and technology-related features of production need to be taken into consideration. Design properties of air ducts, treatment facilities, and other ventilation elements will enable creation of a properly structured dust-removal system. It has been inferred that labour conditions have improved due to optimum aerodynamic properties of the dust-removal system. An example has been considered of applying the material herein in practice.

Key words: receiving point, dust, dust-removal system, air speed, labour conditions.