Abstract: The essence of the invention is that the material grinding device comprises a housing with a unit for feeding the material to be ground and a unit for removing the finished product. An annular grinding chamber and two rotors are accommodated in the housing. The rotors are coaxially arranged and can rotate. Blades for accelerating the material to be ground and feeding sad material into the grinding chamber are mounted on one of the rotors. Blades for supplying air into the grinding chamber are mounted on the other rotor. The device is provided with at least one distributor. Said distributor is designed in the form of blades which are secured on the housing and disposed in the grinding chamber. The vanes of the distributor are equally spaced along a circle, the center of which is situated on the longitudinal axis of symmetry of the rotors.

Abstract: The essence of the invention is that it involves the feed of a material to be ground and the acceleration of said material. During acceleration, jets are formed from a mixture of material to be ground and air and said mixture is fed to an annular grinding chamber. Simultaneously, a stream of air is fed into the grinding chamber in a direction contrary to that of the mixture jets. Local cyclic variations in the pressure and rate of the air stream and/or in the pressure and rate of the mixture jets are formed along the perimeter of the grinding chamber. The finished product is removed. The material grinding device comprises a housing with a unit for the feed of the material to be ground and a unit for the removal of the finished product. An annular grinding chamber is accommodated in the housing. Two rotating rotors with the blades fastened thereto are coaxially arranged in the housing.