PNEUMOPERCUSSIVE VORTEX MILL Russian patent published in 1998 - IPC

FIELD: grinding of loose products of organic or inorganic origin with any strength and flexibility. SUBSTANCE: located over periphery of internal surface of working cylindrical chamber are immovable milling plates forming multiface prismatic surface coaxial to working cylindrical chamber, and trihedral unloading prisms installed in a spaced relation to each other Located before the first milling plate, tangentially to external surface of working cylindrical chamber is branch pipe for supply of compressed air. As result of complex motion of air-material mixture, its particles acquire centrifugal acceleration due to high circular velocity that leads to dynamic high-velocity collision of particles with milling bodies and partially with one another. Milled particles are withdrawn from mill through slots formed by gaps between unloading prisms, and device for withdrawal of ground material. Particles which have not passed the full cycle of grinding are withdrawn through additional device and circular slot in diaphragm separating working cylindrical chamber and additional device. All main working devices of mill are regulated for selection of optimal grinding results. EFFECT: higher efficiency. 7 cl, 3 dwg