Knife mill is employed where fine particle sized discharge is required and tight control over size distribution is important. Care must be taken to ensure that difficult to shred items such as metals, rocks are removed before entering the knife mill to prevent damage to the knives. It consists of two straight knives, which are arranged at different heights at right angles to the direction of rotation, rotate in the center of the vessel. It can process substances with a high water, oil, or fat content. It reliably grinds dry, soft and medium hard products. It is mainly used in food processing industries and chemical industries.