DRUM-TYPE GRAIN MILL Russian patent published in 2004 - IPC

FIELD: granulation of mineral fertilizers. SUBSTANCE: the invention presents a granulating drum-type grain mill and is pertinent to the devices used for granulation of the solid matters, in particular, mineral fertilizers with use of the liquid and solid raw products. The drum-type grain mill contains the basic drum with a transporting head piece made in the form of the distributive vanes mounted inside in some rows, and the supported vanes mounted in front of the distributive vanes and in front of the supporting ring at the exit end of the drum. The drum-type grain mill also has: an additional outside drum; a reverse screw located between the drums and rotating together with them; the chamber for the product loading made in the form of the outer ring with the receiving - transporting vanes located opposite to the receiving windows of the basic drum and conveying launders, installed behind each receiving window; the transporting screw located between the chamber of loading and supported vanes; the chamber of unloading of a product; the device of returning of a crushed fine fraction into the basic drum located in the ring interdrum space behind the reversing screw; the injector and a charging pipe mounted on the stationary part of the chamber of loading. The basic drum has a classifier connected with both drums and the cleaner of the classifier fixed in the wall of the chamber of unloading. The device of the fine fraction return is made in the form of the radial receiving-distributing transporting vanes passing through the receiving windows in the basic drum. It is located between supporting and distributing vanes. Technical result is provision of uniformity of a crushed fine fraction circulation and mixing of the components. EFFECT: the invention provides uniformity of the crushed fine fraction circulation and mixing of the components. 3 dwg