SU1003889A1 - Mill for fine disintegration - Google Patents

Description

(54) MILL FOR THIN GRINDING

one.

Isophegeny relates to grinding, in particular, to equipment for the grinding of hard materials.

The famous Shahn's mill (a mill with kachakshimi bilami) intended primarily for. grinding fuel. Its main elements: the rotor with bilami, casing and mine. The fuel to be ground is fed through the chute to & 1 spinning bite. Raemol fuel is mainly carried out by hitting the fuel Cl

Mine mills are usually considered aggregates adapted for. coarse dust.

The closest to the technical dryness of the invention is a mill for fine grinding, a rotor with hinged beams, on the shaft of which a blower fan is mounted, connected to the body of the grinding chamber air inlet and separator, as well as a discharge unit with a storage bin: rum. In a known mill, to speed up the pro- cessing process of ground product, an impeller is mounted on the shaft, providing from & 1) the pressure of the transporting air coming from the atmosphere through the intake pipe. Dust biphasic mixture expelled by transporting air to the trap or separators G2 3

ten

In the dust separator 1-separators, air and ground product are separated. However, chbyut air enters the discharge hopper

Claims (2)

15 together with the ground product, which leads to a considerable dust separation) with continuous unloading. To reduce this process, it is necessary to supply the discharge hopper with a valve, to accumulate the finished product in it. And to carry out periodic grinding of the ground product. However, the crushing process must be interrupted, i.e., the hammer crusher must be stopped, which leads to a loss of productivity by 15-20%. The purpose of the invention is to reduce dust emission during unloading and increase production capacity. This goal is achieved by the fact that in a mill for fine grinding, containing a rotor with hinged beams, on the shaft of which a blower fan is mounted, connected to the body of the grinding chamber, an air intake and setharator, as well as a discharger with accumulative bunker, is equipped with an attached to its bottom part by a pneumatic elevator, and a mixing chamber, made in the form of a straight cone with windows on the side surface for feeding the Ground material, while in the cavity of the cone Hovhan nozzle for supplying compressed air, provided with a collecting hopper level sensor particulate material. In this case, the nozzle of the nozzle can be provided with side holes for supplying compressed air into the cavity: t. The drawing shows a mill with a cut on unloading Usgroyogvu, General view. The mill includes grinding chamber 1, a rotor with beaters and an impeller 2, an air intake 3, a mesh partition 4, a material supply hopper 5, a cyclone 6 for separating the fine product powder from the vortex air flow, a powder discharging device 7. The powder unloading device includes a sealed bunker 8, a mixing chamber 9, made in the form of a cone with windows 10 for collecting powder, the outlet of which is connected to the end of the conveyor of the pneumatic lifter 11, a nozzle 12 for supplying compressed air located inside the mixing chamber and filled with additional, lateral orifices 13 of small diameter, providing a two-phase suspended state n: the spray in the mixing chamber and the sensor of minimum control of the powder level 14, electrically insulated with a tap 15 separated t contact with the powder. Inductive-type sensor with electronic unit 16 for forming the commanding on the solenoid valve 17, installed on the pipeline J i. Compressed air supply. The sensor ensures the inclusion of a source of compressed air (not shown in the drawing) only if there is a certain level of powder that provides preliminary filling of the mixing chamber. Otherwise, the air from the pneumatic system, entering the cyclone b through the side openings 13 of the nozzle 12, creates a counter-flow and prevents the finished product from separating from the air. When a source of compressed air is turned on in the mixing chamber 9, a drink-air mixture is formed, which is captured by the air flow through the main opening due to the ejection effect and is carried along the air lift 11 to the loading tank. When filling the tank, the source of compressed air can be turned off and the tanks should be replaced without stopping the mills. The fact that the mill has the proposed device allows to improve the working conditions due to a significant reduction in dust emission and increase equipment productivity by 15-20%. ; The formula was invented and, 1. Small for fine grinding, containing a rotor with a hinged pin. Bottoms, on the shaft of which a blower fan is mounted, connected to the housing of the grinding chamber is an air intake box and a separator, as well as a discharge device with a tilting bunker, so that, with the distance to reduce the dusting during unloading and the overall performance, it is the unloading device is equipped with a pneumatic lift connected to its bottom chassis with a mixing chamber mounted in a straight cone with openings on the side surface for feeding crushed material A volume in the cone cavity is equipped with a nozzle for supplying compressed air, and the storage bin is equipped with a level sensor of ground material. 2. Mill according to claim 1, characterized in that the nozzle of the injector is equipped with side openings for supplying compressed air into the cavity of the cone. . Sources of information taken into account in the examination 1.Romadin V.P. Dust preparation. M., Gosenergoiadat, 1953. 2. The patent of Sweden No. 203422. cl. 50 sec., 8/01, 1968. Oat MmowMnv BZhV aa benuuh L / In the account of euKoant