RU2560988C1 - Drum ball crusher - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: crusher contains loading and unloading devices, crushing bodies, drive drum installed on the supports, inside it a shutter with holes is installed. The internal drum volume is divided to sections using the shutters installed in pairs with possibility of rotation. On the shutter surfaces along the concentric circles the square holes are made, one of diagonal is located radially. In each section on the drum internal surface the blades with windows are secured.

EFFECT: high efficiency of crushing.

4 dwg

Description

The present invention is intended for use in the chemical industry, agriculture, the production of building materials and other industries.

Known drum ball mill [RF Patent 2279923], containing loading and unloading devices, lattices, which are motionlessly connected to the housing, the wear-resistant lining elements of which are hollow and arranged in rows along a helical line. The lining element of each row has openings on the outside. Perforated ellipse segments are mounted in the housing motionless parallel to each other, which are inclined to the longitudinal axis of the body and closed on opposite sides by lids parallel to them and repeating their shape to form closed cavities between the ellipse segments and the covers, in communication with the screw channels. The direction of the curvilinear generatrix is opposite to the direction of the screw of the channels and coincides with the direction of rotation of the housing.

The disadvantages of this mill are the complexity of the design and the low degree of grinding.

Closest to the proposed invention is a ball drum mill with an unloading device [RF Patent 126629], containing loading and unloading devices mounted on the supports of the drive drum, grinding media. In the inner volume of the drum there is a shutter with holes and a discharge cone with a central cone-shaped hole and discharge blades.

The disadvantages of this apparatus are the design complexity and a low degree of grinding.

The objective of the invention is the creation of a drum ball mill of less complex design and with a high degree of grinding.

The problem is achieved in that in a drum ball mill containing loading and unloading devices, grinding media, a drive drum mounted on supports, inside which a damper with holes is installed, the inner volume of the drum is divided into sections using dampers installed in pairs with the possibility of rotation, into the surface of the shutter is made square holes arranged in concentric circles, and one of the diagonals of the holes is installed radially, and in each section on the inner surface The surface of the drum fixed blades with windows.

Figure 1 presents a diagram of a ball mill.

Figure 2 shows a section aa.

Figure 3 shows a section bB.

Figure 4 shows a blade with a window.

The drum ball mill contains devices for loading material 1 and unloading 2, an inclined drum 3. The drum is divided into sections by means of damper 4 mounted in pairs with the possibility of rotation relative to each other and having square-shaped openings 5 arranged in concentric circles. The drum is mounted on bearings 6. On the inner surface of the drum 3, in each section, blades 8 are fixed with windows 9. The drum is driven by an electric motor 7.

Drum ball mill operates as follows. The materials to be crushed come from the loading device 1 into the internal volume into the first section of the drum 3, filled with grinding media (balls). When the drum rotates, the material is crushed. In order to intensify the grinding process on the inner surface of the drum 3, in each section, blades 8 with windows 9 are fixed. Grinding bodies and large pieces of material are captured by the blades, rise and fall from the top of the drum, and small particles pass through the holes. Thus, grinding of the material occurs both due to abrasion by grinding bodies, and upon impact (falling) of the balls. In order to separate the material crushed to a certain particle size in the shutters 4, holes 5 are made through which the particles enter the next section along the way. The presence of pairwise installed dampers 4 having square openings allows you to adjust the size of the through holes by turning the dampers. The holes 5 in the shutters are arranged in concentric circles matching the contacting shutters, one of the diagonals of the holes being installed radially. Thus, when changing the size of the passage opening, their square shape is preserved.

In the following sections, the process is repeated. The finished product is unloaded into the unloading device 2.

Dividing the drum into sections allows for gradual grinding from coarse in the first section to fine in the subsequent ones. At the same time, grinding sections of different diameters are used in different sections. The size of the passage holes between the sections decreases along the movement of the material from the loading point. Such an organization of the process improves the quality of grinding, reduces the cost of time and energy.

The proposed drum ball mill has a simple design and high grinding efficiency.

The dimensions of the square holes in all the dampers are the same. The installation of through holes is carried out by turning the dampers relative to each other. The cross-sections in the dampers are reduced along the movement of the material.

Claims (1)

A drum ball mill containing loading and unloading devices, grinding media, a drive drum mounted on supports, inside of which a damper with holes is installed, characterized in that the inner volume of the drum is divided into sections by means of dampers mounted in pairs with the possibility of rotation, on the surfaces of the dampers holes of a square shape arranged in concentric circles, one of the diagonals of the holes being installed radially, and in each section on the inner surface of the drum Replays of the blade with the windows.

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