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The foreign bodies located in the grain mass have physical and morphological properties that distinguish them from the basic culture, and which are used in manufacturing the separating equipment. The experts’ attention has been drawn by the study of phenomena, which influence the process of separating impurities, aiming at a maximum reduction of impurities from the grain matter. Cereal and industrial plant seed pre-cleaning and cleaning, prior to their storage or processing, is a complex technological process that includes a multitude of constructive types for technical equipment designed to separate and remove existing impurities in the seed mass, which are based on various separation principles. Impurities in the seed mass are also different from the main crop seeds (grain seeds or industrial plants) in terms of aerodynamic properties. This paper presents some theoretical aspects regarding the separation of seed mixtures based on the aerodynamic principle (resistance of the seed mass layer to the passage of air, seed floating capacity, air stream working velocities, total air flow rate), which were the basis for the development of a new type of aeration cleaning separator SCA 5 for seed mixtures cleaning and sorting. The advantages of using this equipment in the process of precleaning/cleaning cereal and industrial plant seeds are also mentioned.

Considerations on technical equipment used for cleaning and sorting seed mixtures based on aerodynamic principle