In the flour grinding process, in order to ensure the purity of the milled wheat, all kinds of impurities in the raw materials should be removed.

When selecting the cleaning sequence, first remove the dust and straw impurities that are harmful to the production, and then remove other mixed impurities and adhesion impurities. a sandstone with a particle size significantly larger or smaller than wheat,The effect of using a screening device is better than that of a destonering machine. The side-by-side impurity with a suspension speed similar to that of wheat is a difficult point to remove impurities. Such impurities need to be removed by a selection or a combination of various methods.