RU144721U1 - VERTICAL VIBRATION MILL - Google Patents

Abstract

A vertical vibration mill, comprising a housing divided by partitions into separate chambers filled with grinding elements, a lid, a supply and a drain pipe, characterized in that at least one of the chambers is divided by a cylindrical insert into two concentric cavities hydraulically interconnected by windows made in the insert at the place of its attachment to the partition, while the surface of this partition is made continuous, and drain troughs, hydraulics are installed outside the external concentric cavity Eski associated with an internal cavity nizheustanovlennoy chamber, the inner wall of the drainage gutter is perforated.

Description

The invention relates to equipment for grinding solid materials using the principle of vibration grinding with the use of grinding elements, mainly balls. The invention can be used in coal, mining, construction and other industries.

Known vibration mills, consisting of a vibro-chamber with a vibrator placed inside (see 1. Internet resource: oszb.ru, ozsb.ru/vibmill.htm).

The disadvantage of these designs of vibration mills is their low productivity with high specific energy consumption.

The closest technical solution to the claimed design in terms of technical nature and the result obtained is a vertical vibratory mill (see 2. Catalog of vibrating transporting technological machines. Ministry of Atomic Energy. State Research and Development Enterprise “Vibrotehnika”, M. 1993, p. 61 -61).

A disadvantage of the known designs of vertical vibratory mills is that these designs are not adapted to work in the wet grinding mode.

The aim of the invention is to eliminate the disadvantages inherent in the analogue and the prototype, and to ensure the possibility of the vertical vibrating mill in wet mode while reducing specific energy consumption for grinding material.

To achieve the goal in the proposed design of the vertical vibratory mill with two concentric cavities, separated by cylindrical inserts and hydraulically connected by windows, made in the insert at the place of attachment of the latter to the partition, it is possible to create the required buffer volume in which the incoming material and the liquid phase are mixed at the same time wet grinding. In this case, the liquid phase cannot be removed from the grinding chamber through the partition between the chambers, which is continuous. Thus, the proposed design of at least one of the chambers provides a uniform pre-crushed fluid mass in it, which is fed to further grinding through the drain troughs installed outside the external concentric cavity and hydraulically connected to the internal cavity below the installed chamber. The implementation of the inner wall of the perforated drain channels allows you to adjust the level of discharge of the flowing ground mass in the chamber.

The design of the proposed vertical mill is shown in the figure.

The vertical vibrating mill consists of a housing 1, divided by partitions 2 into separate chambers 3, filled with grinding elements 4. The mill housing is mounted on a frame 5 with vibration mounts 6. The motors are driven by electric motors 7. The upper chamber is closed by a cover 8 with a supply pipe 9. The lower chamber has drain pipe 10. A cylindrical insert 11 is mounted in the upper chamber, mounted on a partition 2 with windows 12. The insert divides the chamber into two concentric cavities hydraulically interconnected by said windows E 12. Inside the outer concentric cavities mounted discharge troughs 13 which are connected through channels 14 with an internal cavity nizheustanovlennoy chamber. In this case, the inner wall 15 of the drain channels is perforated.

Vertical vibratory mill works as follows.

The source material and the liquid phase (water) through the supply pipe 9 is fed into the inner concentric cavity of the upper chamber of the vibratory mill, filled with a grinding medium. Due to the impact of the vibrating grinding medium, the incoming products are mixed and the wet particles are preliminarily ground. Pre-crushed material through the windows 12, equipped in a cylindrical insert 11, enters the outer chamber cavity, also filled with a grinding medium, under the influence of which wet grinding of solid particles continues. Given the different sizes of solid particles of material in the inner and outer concentric cavities, the size of the grinding medium (usually balls) in the outer cavity is smaller than in the inner one.

The crushed product from the external concentric cavity through the perforated inner wall 15 of the drain grooves 13 through the channels 14 is discharged into the inner cavity of the next chamber of the vibration mill.

Thus, due to the constructive implementation of at least one of the chambers according to the proposed option, it is possible to implement a wet method of grinding material in a vertical vibratory mill. Moreover, due to prolonged contact of the material being ground and the liquid phase, efficient grinding is ensured at low specific energy costs.

Tests of the layout of the vibrochamber at the experimental stand confirmed the effectiveness of the proposed technical solutions (see the appendix).

Table - The results of studies on wet grinding of ash and slag materials in a vibro chamber. The ratio of the mass of the balls to the volume of the vibrochamber was 1.8 kg / l Experience number Initial test capacity, l / h Overflow threshold height, mm The particle size, microns +200 -71 Angarsk CHP Belovskaya state district power station Kuznetsk TPP Tom-Usinsk State District Power Station South Kuzbass Thermal Power Plant Angarsk CHP Belovskaya state district power station Kuznetsk TPP Tom-Usinsk State District Power Station South Kuzbass Thermal Power Plant one 2 3 four 5 6 7 8 9 10 eleven 12 13 0 - - 0.02 84.1 5.8 0.02 61,4 96.3 7.3 64.7 93.7 10.3 one twenty twenty 0 4.6 2.1 0 3.3 99.1 57.7 83,2 98.8 63.3 2 thirty 0 4.9 2,5 0 3.8 99.3 58.0 83.6 99.1 63.7 3 40 0 5.5 2,8 0 4.1 99.7 58.5 84.1 99.6 64.1 four thirty twenty 0 5,6 3,1 0 4.2 98.0 52.8 79,4 96.3 60.1 5 thirty 0 5.9 3.3 0 4.7 98.3 53,4 79.8 96.6 60.5 6 thirty 40 0 6.4 3.6 0 5.1 98.7 53.8 80.3 97.1 60.9 7 40 twenty 0 6.3 5.2 0 5,4 97.2 48.7 74.6 94.0 55.9 8 thirty 0 6.5 6.4 0 5.7 97.5 49.0 74.8 94.7 56.3 9 40 0 6.9 8.7 0 6.1 97.7 49.2 75.1 94.9 56.8

Claims (1)

A vertical vibration mill, comprising a housing divided by partitions into separate chambers filled with grinding elements, a lid, a supply and a drain pipe, characterized in that at least one of the chambers is divided by a cylindrical insert into two concentric cavities hydraulically interconnected by windows made in the insert at the place of its attachment to the partition, while the surface of this partition is made continuous, and drain troughs, hydraulic are installed outside the external concentric cavity Eski associated with an internal cavity nizheustanovlennoy chamber, the inner wall of the drainage gutter is perforated.