Abstract
The paper presents the main theoretical elements underlying the seeds separation process after their surface. During the seed cleaning and sorting process according to the surface condition machines with electromagnetic or magnetic separators drums are used. In this paper is made a comparative theoretical analyze of smooth seeds movement on electromagnetic drum surface and trajectory in free flight, neglecting and taking into consideration air resistance, detached from the separation drum and it is evaluated the collection area of detached seeds. On this basis, were carried out several case studies and numerical simulations for three different machines.
Highlights
Seed separation of parasitic weeds, especially for dodder, is almost impossible to obtain from the seed crop mass by conventional methods
Due to this the differences, between this two categories of seeds, is outlined by mixing them with fine iron powder that adhere to the dodder seeds surfaces, and the cultivated plants seeds are clean
The electromagnetic separation machines work on the seed separation principle in function of seed external surface, which gain magnetic properties, due to their covering with fine iron powder, from the sowing paramagnetic material
Summary
Seed separation of parasitic weeds, especially for dodder, is almost impossible to obtain from the seed crop mass by conventional methods. Due to this the differences, between this two categories of seeds, is outlined by mixing them with fine iron powder that adhere to the dodder seeds surfaces, and the cultivated plants seeds are clean. In this way, dodder seeds can be considered, particles with magnetic proprieties and the other paramagnetic. On this principle are working the magnetic and electromagnetic drum separators [1, 5, 6]
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