RU2231387C2 - Single-roll toothed grinder - Google Patents

Abstract

FIELD: agglomerate grinding equipment used in agglomeration plants.

SUBSTANCE: single-roll toothed grinder has casing, feeding plate mounted in casing, roll with teeth inclined in direction opposite roll rotation direction. Teeth working surfaces have widened portion arranged at tooth base. Grates are made in the form of plates with two working parts, whose working surfaces are arranged at an angle of 90-140 deg with respect to one another. Grates rest upon box-shaped beam, which is arranged in grinder casing in parallel with toothed roll, and are fixed on said beam through U-shaped plates and stops. Grate working surfaces are made in the form of wedge. Width of grate working part in cross-section is reducing in direction of falling of ground material.

EFFECT: increased grinding efficiency, reduced labor intensity during repair works and operation of grinders and reduced downtime of equipment.

5 dwg

Description

The invention relates to the field of metallurgy and can be used for crushing sinter in sinter plants.

Closest to the invention in technical essence is a single-roll crusher for crushing hot sinter, containing a housing, a receiving plate placed therein, a roller with teeth, grates (KLUSHANSEV B.V., KOSAREV A.I., MUYZEMNEK Yu.A. Crushers. Design. Calculation. Features of operation. M .: Mashinostroenie, 1990, p. 179).

The disadvantage of the crusher is that the grate is located under the rollers with teeth, which causes their increased wear under the spacer rings, while the sinter, getting between the spacer rings and grates, is crushed, which increases the percentage of fines in it, reducing the percentage of usable agglomerate and lowering it quality. Due to the high temperature of the agglomerate, grate bars of large length located under the roll with teeth are deformed, broken, or pushed out of the nests by the teeth of the roll, which leads to large downtime of sinter crushers and sinter machines; in addition, grate bars can be used once, their resistance is low due to their increased wear under the roll. The mass of grates is large, and the percentage of use of the metal from which they are made is small. The shock working side of the roll teeth is concave, and the agglomerate is scattered inside the housing, causing the need to increase the volume of the lining inside the housing, reducing the durability of the housing, its lining, the teeth of the roll.

 The objective of the invention is to increase the efficiency of crushing, reduce temperature deformations of grates, reduce labor costs during repairs and operation of sintering machines, increase reliability, reduce downtime of sintering machines and sinter machines during operation, the possibility of developing sintering machines with optimal resistance for sinter machines of different capacities

 The task is achieved in that the single-roll crusher contains a housing, a receiving plate placed therein, a roller with teeth, grates, while the teeth of the roller are made with an angle of inclination opposite to the direction of rotation of the roller, and the working surfaces of the teeth are made with broadening to the tooth base relative to its axis , the grid-irons are made in the form of plates containing two working parts, the working surfaces of which are located at an angle of 90-140 ° to each other, the grid-irons are supported by a box-type beam located in the crusher casing the rolls with teeth, and are fixed on the beam for a predetermined step by means of U-shaped plates and stops, while the working surfaces of the grates are made in the form of a wedge, and the width of the working part of the grates in the cross section decreases in the direction of incidence of the crushed material.

Figure 1 shows a single-roll gear crusher;

figure 2 is a top view of figure 1;

figure 3 is a section aa in figure 1;

figure 4 is a cross section CC in figure 3;

figure 5 is a cross section DD in figure 3.

The device comprises a housing 1 with a roll 2 with teeth placed in it, grid-irons 3 in the form of plates containing two working parts, the working surfaces of which are located at an angle of 90-140 ° to each other, U-shaped plates 4, a box-type beam 5 of the receiving plate 6, lined with plates. The grate rests on a box-type beam 5, placed parallel to the roll with teeth, and fixed on the beam at a predetermined step by means of U-shaped plates and stops 8 from the side of the rear wall of the housing.

The length of the working parts of the grate, located under the roll with teeth, is reduced to the minimum possible value, which dramatically reduces the temperature deformation of the grate during crushing of heated materials.

When one of the working parts of the grate is worn, they are turned over and the second working parts are used. To capture the grate with slings when they are turned over and replaced, each of them has two grooves. U-shaped plates located between the grates have two functions - they form a step between the grates and close the gaps between them to prevent crushed material from entering the crusher body area located behind the grates.

The teeth of the roll are made with a broadening to the base of the tooth relative to its axis and, rotating, crush the material with convex surfaces. Crushing the material by the convex surfaces of the teeth, inclined to the side opposite to the rotation of the roll, allows for the gradual entry of the teeth into the crushed material and smooth grinding, free loss of material from the space between the teeth, which eliminates the spread of it inside the housing, increasing the durability of the housing, its lining and the teeth of the roll .

The crusher works as follows. The drive of the roll 2 of the crusher is turned on, and through the receiving plate 6 they begin to feed the material for crushing into its working space. When the roll rotates with teeth, it breaks and pushes the crushing material between the grates 3, crushing is performed.

When one row of working parts of the grate is worn, they are rearranged by 180 ° and the 2nd working part is used.

The use of the described crusher allows you to increase the resistance of the grate by 2.5-3 times, the resistance of the teeth of the roll by 2-2.5 times, reduce the percentage of fines in the crushed material, thereby increasing the output of materials after crushing by 5-10%, reduce downtime of crushers and equipment 2-2.5 times, create crushers of different capacities and optimal durability.

Claims (1)

A single-roll gear crusher containing a housing, a receiving plate placed therein, a roll with teeth, grates, characterized in that the teeth of the roll are made with an angle of inclination opposite to the direction of rotation of the roll, and the working surfaces of the teeth are made with a broadening to the tooth base relative to its axis, grates made in the form of plates containing two working parts, the working surfaces of which are located at an angle of 90 ÷ 140 ° to each other, the grates are supported by a box-type beam placed in the crusher body parallel to the roll with slaughter and fixed on the beam at a predetermined step by means of U-shaped plates and stops, while the working surfaces of the grate are made in the form of a wedge, and the width of the working part of the grate in the cross section decreases in the direction of incidence of the crushed material.

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