RU214209U1 - ROLL MILL - Google Patents

Abstract

The utility model relates to means for grinding material such as petroleum coke, cement raw materials and other similar materials.

Roller mill works as follows. The material to be ground through the supply system 6 is metered into the body 1 and enters the grinding plate 2, which is driven into rotation by the drive 3. Scattering on the grinding plate from the center to the edges, the material falls under the rollers 5, which roll freely on the surface of the grinding plate, pressed by their own weight and forces F of clamping systems. Additional drives of torsional vibrations 8 installed on the axis 4 of rotation of the rolls do not interfere with the overall rotation of the rolls, but only impose additional torsional vibrations, the frequency of which for each material is set experimentally. The material, falling under the rolls, is crushed by them due to the pressing force F. The crushed material is picked up by the air flow pumped through the mill from the bottom up (shown by arrows) and enters the separator 7, where particles that have reached the required dispersion are removed from the mill with the pumped air flow, and larger ones fall back onto the grinding plate.

An increase in the productivity of a wave mill is achieved due to the fact that torsional vibrations are additionally superimposed on freely rolling rolls relative to their rolling axis. 1 fig.

Description

The utility model relates to means for grinding material such as petroleum coke, cement raw materials and other similar materials.

Known roller mill containing a housing inside which is placed a horizontal grinding plate, kinematically connected to a rotation drive, mounted on the axes of the rolls, each of which is adapted to rotate around the axis when mating with the surface of the grinding plate, and the system for supplying and discharging feedstock (RF Patent No. 2508943, IPC B02C 15/00, 2009).

The raw material is sent to the grinding table through the raw material supply unit. Each roller is pressed against a rotating grinding table and thus rotates around the axis of the shaft on which it is mounted. Grinding of raw materials is carried out due to its interaction with the surface of the rolls. The grinding product is discharged by a draft device through a separator and an outlet pipe in the upper part of the mill body.

This device, in terms of technical essence and the achieved result, is closest to the proposed one and, therefore, is accepted as its prototype.

The disadvantage of this device is its low performance.

The objective of the development is to increase the productivity of the roller mill.

The solution to this problem is a roller mill, containing a housing, inside which there is a horizontal grinding plate, kinematically connected to a rotation drive, rolls mounted on axes, each of which is adapted to rotate around the axis when mating with the surface of the grinding plate, and a system for supplying and discharging feedstock , while the device is additionally equipped with torsional vibration drives, each of which is kinematically connected to the axis on which the roll is installed.

Figure 1 shows a schematic diagram of a roller mill.

Roller mill (figure 1) contains a housing 1, inside which is placed a horizontal grinding plate 2, kinematically connected to the rotation drive 3, installed on the axes 4 rolls 5, feed system 6 feedstock and removal of the finished product through the separator 7, torsional vibration drive 8 .

The device works as follows.

The material to be ground through the supply system 6 is metered into the body 1 and enters the grinding plate 2, which is driven into rotation by the drive 3. Scattering on the grinding plate from the center to the edges, the material falls under the rollers 5, which roll freely on the surface of the grinding plate, pressed by their own weight and forces F of clamping systems. Additional drives of torsional vibrations 8 installed on the axis 4 of rotation of the rolls do not interfere with the overall rotation of the rolls, but only impose additional torsional vibrations, the frequency of which for each material is set experimentally. The material, falling under the rolls, is crushed by them due to the pressing force F. The crushed material is picked up by the air flow pumped through the mill from the bottom up (shown by arrows) and enters the separator 7, where particles that have reached the required dispersion are removed from the mill with the pumped air flow, and larger ones fall back onto the grinding plate.

An increase in the productivity of a wave mill is achieved due to the fact that torsional vibrations are additionally superimposed on freely rolling rolls relative to their rolling axis.

Due to additional vibrations of the rolls, it is possible to increase the productivity of the mill by up to 60% while increasing the total energy consumption by only 20%.

Claims (1)

SUBSTANCE: roller mill contains a housing, inside of which there is a horizontal grinding plate, kinematically connected to a rotation drive, rolls mounted on axes, each of which is adapted to rotate around the axis when mating with the surface of the grinding plate, and a system for supplying and discharging feedstock, characterized in that that the device is additionally equipped with torsional vibration drives, each of which is kinematically connected to the axis on which the roll is mounted.

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