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The route of the material flowing in the high-level sieve of the flour is sieved. Screening is a combination of various forms of sieves. The principle of screen combination: make full use of the sifting space, increase the effective sifting area, ensure the drying rate of various graded materials, and improve the processing capacity of the flat screen.
When screening the screen, firstly, according to the requirements of the flour mechanical milling process, the types of graded materials of each screen should be determined. Generally, the higher the precision of the powder, the finer the classification, and the more grades. Then, according to the principle of easy and difficult, the order of classification is determined, and the quantity of materials that are easy to be sieved is first screened out, which can effectively reduce the amount of sieving of the subsequent graded materials. Secondly, the appropriate sieving length is determined according to factors such as the size of the sieving material, the sieving property, the size of the mesh, the amount of the sifted material, and the difficulty of wearing the multi-mesh. Finally, referring to the position of the discharge port of the screening material, the form and arrangement direction of each layer of the sieve are determined, and the height of each layer of the sieve is determined according to the total height of the interior of the sieve box and the flow rate of the sieve materials of each layer.
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