SU1618464A1 - Cylinder screen - Google Patents

Abstract

The invention relates to a technique for the classification of materials by size and m. used in the mining, metallurgical, construction, and other sectors of the national household. The goal is to increase the efficiency of screening by pre-separating the coarse and fine fraction on the inner surface of the screening drum (PB) 2. To do this, on the inner AA surface of the PB are fixed radially and uniformly around the perimeter of PB 2 perforated longitudinal baffle plates 8. Inside PB 2 is tilted with respect to the plate 8 with gaps 10 and 11 relative to it and the inner surface of PB 2, additional longitudinal plates 9 are located. The height of the plate 9 is greater than the height of the plate 8. The gap 11 of the plate 9 is relative The inner surface 2 of the PB 2 is made not more than the height of the plate 8 and not more than the gap 10 relative to the latter. The size of the holes of the plate 8 is made equal to the size of the holes of PB 2. The plates 8 are located in front of the plates 9 in the course of the rotation of PB 2. By forming the buckets in this way, the plates 8 and 9 allow pre-separating coarse and fine materials on the inner surface of PB 2. This reduces the penetration of the screeners holes and increases the residence time of the material on the surface of the PB 2. 1 hp f-ly, 2 ill. J

Description

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The invention relates to a technique for classifying materials according to size and can be used in the mining, metallurgical, construction, and other areas of the national economy where it is necessary to classify the material.

The purpose of the invention is to increase the efficiency of screening due to the preliminary separation of coarse and fine fraction on the inner surface of the drum.

FIG. 1 shows a drum screen, a longitudinal section; in fig. 2 is a section A-A in FIG. one.

The drum screen is a cylindrical body 1, a screening drum 2, several staves made of splat sieves. Head 3 and tail 4 corps 1 deaf with interchangeable armor plates. To the blind parts 3 and 4 of the cylindrical body 1 there are attached two bands 5 supported on four rollers 6, two of which are driving. Drive 7 drum screen contains an electric motor, gearbox and clutch. On the inner surface of the cylindrical drum 2 along the axis of rotation of the drum 1, uniformly around the perimeter are fixed radially rectangular perforated breaker plates 8, above each of which additional plates 9 are located inside the drum with a slope relative to the perforated radial plate 8 with a gap 10 relative to the last and with a gap 11 relative to the inner surface of the drum 2. The height of the additional plate 9 is made larger than the height of the radial baffle plate 8. The gap 11 is inclined plastic Tina relative to the inner surface of the drum is made not more than the height of the radial fender plate 8 and not more than Gap 10 relative to the latter. The size of the holes of the plate 8 can be made equal to the size of the screening holes of the drum.

This is especially necessary in the case of processing of very thinned pulps, since the perforated baffle plates 9 in this case will be used as an additional source of preliminary classification of material.

The plates 8 are located in front of the plates 9 in the direction of rotation of the drum (Fig. 2). Plates 8 and 9 thus form buckets, allowing pre-separation of coarse and fine material on the inner surface of the drum (which reduces clogging of the screening holes, increases the residence time of the material

on the surface of the drum, improves screening efficiency.

Drum rumble works as follows.

When the drum 2 rotates, the material is carried by the fender plates 9 to a certain height and flows into the buckets with drain gaps 10 and 11. At the same time, the largest particles will be trapped on the fender wall 8, not directly falling into the bucket. The material being processed that has fallen into the bucket will be represented by that class of material that should participate in the direct classification

5 groove sieve drum 2, consisting of a liquid phase and fine granular material. Raised to a certain height, coarse-grained material with further rotation of the body 1 of the screen is dropped

0 past the buckets to the bottom of the cylindrical housing 1. Thus, the coarse grains of the material being processed will not prevent the passage of small grains of material through the sieve surface 2. Moreover, the baffle plates 8 allow the processed material to be raised to a greater height and, consequently, , use a large area of the sowing surface 2 screens.

This circumstance also leads to an increase.

0 screening efficiency.

Claims (2)

1. Drum screen, including a screening drum, on the inner surface of which is fixed radially 5 and evenly around the perimeter of the drum, perforated longitudinal baffle plates, a rotational drive associated with the drum, in order to increase screening efficiency by preliminarily separating the coarse and fine fraction on the inner surface of the drum, the rumble is provided with additional longitudinal plates, each of which is located inside the ba5 Raban with an inclination relative to the perforated radial baffle plate with a gap relative to the latter and relative to the inner surface drum, wherein the height plate further 0 is made greater than the height of the radial baffle plate, and the gap of the inclined plate relative to the inner surface of the drum is made not more than the height of the radial baffle plate and not more 5 gap relative to the latter. 2. The screen according to claim 1, characterized in that the size of the holes of the perforated radial breaker plate is made equal to the size of the holes of the screening drum.