No matter what kind of grain is processed by flour milling, the cleaning of raw grain is very important. The process of producing flour by a wheat milling machine involves the cleaning of raw wheat grains. The purpose of this is, on the one hand, to improve the technological effect of the wheat milling machine and ensure the production of the wheat milling machine. On the other hand, it is to improve the purity of the product and ensure the quality and taste.

During the harvesting and transportation of wheat raw grains, large, light impurities such as straw and weeds will be mixed into the wheat raw grains, which can easily cause blockage of the pipes of the grinding machine, affect the processing efficiency of the grinding machine, and reduce production quality. Small impurities such as dust and silt in raw grains will cause flying dust during production, pollute the workshop environment of the grinding machine, and endanger human health.

In addition, if hard impurities such as stones and metal are mixed into the raw grain, it will damage the grinding machine, causing wear and tear of the grinding machine and more serious damage. And when these impurities are mixed into the flour, they will reduce the purity of the flour. Therefore, the impurities must be removed through the cleaning process.