BG112466A - Vertical milling machine - Google Patents

Abstract

The present invention relates to a vertical milling machine that will find application in the cement and mining and manufacturing industries, and in particular for the desintegration of various materials. The designed vertical mill machine includes a housing (18) in which it is located a mill table (5) driven by a reductor (7) fastened to a base (8) to which is fixed a clipsing system (6) provided with rollers (14). The housing (18) is also provided with an inlet groove (3), an inlet gas duct (9) with a ring with nozzles (16) and an outlet gas duct (2), as well as with a separator (4) connected to a drive mechanism (1). To the outlet gas duct (2) is connected a finished product separation device (17). Between the finished product separation device (17) and the inlet gas duct (9) are arranged in series a fan (19), an exhaust gas pipeline (24), a third adjustable valve (20), another atmospheric gas pipeline (22), a fourth adjustable valve (21) and third pipeline (23) for hot gases. The mill machine according to the invention also comprises a pneumatic mechanism including a pressure boosting device (12) which via a system of pipelines through an adjustable valve (10) for atmospheric gases and a second adjustable valve (11) for recirculating gases is connected from one side to the inlet gas duct (9) and the atmosphere, and on the other hand, through a pressure conduit (13), is connected to second nozzles (15) directed to the table (5). The pressure boosting device (12) can be either a compressor or a blower, or a fan, or any other device with similar action.

Description

VERTICAL MILL

Field of technology

The present invention relates to a vertical mill which will find application in the cement and mining processing industry and in particular for the disintegration of various materials.

BACKGROUND OF THE INVENTION

Vertical mills are used for crushing limestone, clinker and other raw materials in the production of cement, coal for thermal power plants, as well as other natural or processed materials. Most often the crushing of the material is done between a driven rotating table with a vertical axis and rollers with a differently profiled cylindrical surface placed above it. The way of arrangement and the shape of the rollers depends on the purpose of the mill.

From practice, a vertical mill is known, including a housing in which the materials to be disintegrated enter through an inlet chute and fall onto a grinding table. The table is rotated by a reducer, which is attached to the foundation. Due to the centrifugal forces and the force of gravity, the material falls into the space between the table and the rollers of the pressing system, where it is crushed and crushed. By means of the centrifugal force, the crushed and crushed material enters the ascending flow of gases entering through an inlet flue and a ring is a nozzle that lifts the particles to the separator when their velocity is higher than the velocity. From the gas flow, the separator returns particles larger in size, back to the mass for subsequent disintegration. The particles passed through the separator continue with the flow of the exhaust gases through the exhaust flue for subsequent separation in a device for separating the finished product. The finished product is separated and taken out of the mill. The gases that have passed through the device for separating the finished product continue to a fan, which increases their pressure. By changing the position of the adjustable valve, the amount of gases that are discharged outside the mill as exhaust gases is changed. Another adjustable valve changes the amount of atmospheric gases that enter the mill. Hot gases from an external source can also enter the mill. The gas mixture thus obtained enters the mill again through the inlet flue.

The famous mill allows you to adjust the fineness of the ground product within narrow limits.

Technical essence of the invention

It is an object of the invention to provide a vertical mill with an additional pneumatic mechanism which provides better regulation of the fineness of the finished product by increasing the productivity and energy efficiency of the mill.

The problem is solved by creating a vertical mill, including a housing in which a grinding table is located, driven by a reducer attached to the foundation. A pressing system equipped with rollers is also attached to the foundation. The housing is also equipped with an inlet chute, an inlet flue with a ring with nozzles and an outlet flue, as well as a separator connected to a drive mechanism. A device for separating the finished product is connected to the outlet flue, and between the device for separating the finished product and the inlet flue are successively arranged a fan, an outlet pipe, a third adjustable valve, an atmospheric gas pipe, a fourth adjustable valve and a hot gas pipe. . The mill according to the invention also comprises a pneumatic mechanism comprising a pressure boosting device which is connected on the one hand to the inlet flue and the atmosphere by a system of pipelines through an adjustable atmospheric gas valve and a second adjustable recirculation gas valve, and on the other hand by discharge pipe is connected to a second nozzle directed to the ground.

The booster device may be either a compressor, or a blower, or a fan, or the like.

The advantages of the created vertical mill are that with the help of the pneumatic mechanism the effect of grinding the product is reduced, better regulation of the fineness of the finished product is provided, freeing space on the table for fresh materials for grinding. The present invention increases the productivity of the mill per unit time and reduces the energy consumption per unit of production.

Description of the attached figures

The present invention is illustrated in the attached figure 1, which is a schematic diagram of the created vertical mill.

Examples of the invention

The created vertical mill, shown in figure 1, includes a housing 18, in which a grinding table 5 is located, on which the disintegrant material enters through an inlet chute 3. The grinding mass 5 is rotated by a reducer 7, which is attached to the foundation 8. Under the influence of centrifugal forces and its own weight, the material falls into the space between the mass 5 and rollers 14, from a pressing system 6, where it is crushed and grinding.

The increased separation of the fine particles from the disintegrated material is effected by means of a pneumatic mechanism comprising a pressure boosting device 12, which may be a compressor, a blower, a fan or the like. The inlet gases to the device 12 are supplied by a system of pipelines through an adjustable valve 10 for atmospheric gases and a second adjustable valve 11 for recirculation gases coming from the inlet flue 9. The disintegrated material, on the one hand, due to the generated centrifugal force from the rotational mass 5, moves to a ring with nozzles 16 is lifted by the incoming gases and directed to the separator 4. On the other hand, second nozzles 15 are connected to a discharge line 13 connected to the pressure boosting device 12 for blowing fine particles from the mass. 5 and supplying them to the separator 4. The second nozzles 15 can be of different numbers, as well as of different shape or cross-section, the distance from them to the table 5 can be changed. The second nozzles 15 are directed in the area of exit of the disintegrated material from the space between the rollers 14 and the table 5.

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In the separator 4, driven by a drive mechanism 1, through an upward flow of gases entering through the inlet flue 9 and the ring with nozzles 16, particles of crushed and crushed material, whose speed is higher than the speed of hovering, enter. The separator 4 separates the particles larger than the predetermined ones, returning them back to the table 5 for further disintegration. The particles passing through the separator 4 continue with the flow of the exhaust gases through the exhaust flue 2 for further separation in the device 17 for separating the finished product. The finished product is separated and taken out of the mill. The gases passing through the device 17 for separating the finished product continue to the fan 19, which increases their pressure. By changing the position of the third adjustable valve 20, the amount of exhaust gases passing through line 24, which is discharged outside the mill, is changed. A fourth adjustable valve 21 changes the amount of atmospheric gases entering the mill through another line 22. Hot gases can also enter the mill through a third line 23 from an external source. The resulting gas mixture of atmospheric, recirculating and hot gases enters the mill through the inlet flue 9. _____________

Claims (2)

PATENT CLAIMS A vertical mill comprising a housing in which a grinding table is arranged, driven by a reducer attached to a foundation to which a pressing system is provided, provided with rollers, the housing being also provided with an inlet chute, an inlet flue with a ring. with nozzles and an outlet flue, as well as with a separator connected to a drive mechanism, in which a device for separating the finished product is connected to the outlet flue, and between the device for separating the finished product and the inlet flue are successively located a fan, an outlet pipe , third adjustable valve, atmospheric gas line, fourth adjustable valve and hot gas line, characterized in that the mill also contains a pneumatic mechanism including a device (12) for increasing the pressure, which through a system of pipelines through an adjustable valve ( 10) for atmospheric gases and a second adjustable valve (11) for recirculation gases is connected on one side to the inlet the flue (9) and the atmosphere, and on the other hand by means of a discharge line (13) is connected to second nozzles (15) directed to the table (5). Vertical mill according to claim 1, characterized in that the pressure boosting device (12) can be either a compressor, a blower, a fan or the like with a similar action.