RU2524062C1 - Classifying roll disintegrator - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: classifying roll disintegrator two inclined adjustable surfaces mounted at the frame to make lengthwise adjustable slot, intake and discharge devices. Said two inclined surfaces are composed of rolls arranged with clearance to run in opposite directions. One roll rpm is lower that that of the second roll. Ring-like rings are made on roll surface over its length and arranged in staggered order. Irrigation system is mounted between said rolls above said clearance.

EFFECT: higher efficiency, intensified disintegration.

4 dwg

Description

The invention relates to mineral processing, in particular, to plants for disintegration and classification by size of material, and can be used in the processing of ores and sands of placer deposits.

Known installations that combine the process of disintegration - the destruction of cemented material and its separation into separate particles to release grains of valuable minerals from each other and from waste rock - and screening - separation of large material that does not contain valuable minerals, followed by its removal into the dump ( Polkin S.I. Enrichment of ores and placers of rare and precious metals, M .: Nedra, 1987, 428 pp.). The plants use various elements of influence on the processed material: rotation of the screening surface, sieve, rotor, vibration, etc.

These plants are applicable to the processing of medium- and easily washed ores and sands, are not economical, require high water consumption, and are energy and metal-intensive.

Known screens for the primary processing of clay material using vibration exciters (O.S. Bogdanov. Guide to ore dressing. M: Nedra, 1972, v.1, p. 46-62).

These installations have low productivity, reliability, wear resistance and efficiency.

A roller sieve is known, which is a block of inclined rollers of variable cross section, decreasing from top to bottom, on which the size of the starting material is classified and then the fractionated material is unloaded into hoppers located under the roller sieve. The roller working bodies are informed of the rotational movement with the same angular velocity so that each subsequent roller rotates in the opposite direction compared to the previous one (Copyright Certificate No. 287513 of 07.10.69, B07B 1/12).

A disadvantage of the known sieve is the insufficient efficiency of disintegration and classification of the material and low productivity, due to the fact that to prevent jamming of material particles between adjacent rollers rotating towards each other from the side of the working surface, their slotted holes are blocked, which leads to a decrease in productivity.

A device for separating lump clay from minerals is known, including a loading device, roll working bodies mounted on the frame, a device for changing the angle of inclination of the frame in two mutually perpendicular directions, the rolling working bodies are grouped in tiers located one below the other, consisting of several successively installed blocks of two or more rolls, while the rolls in each block are made with a diameter increasing in the direction of rotation of the rolls, and with spiral ribs on the surface (RF patent No. 20111439 from 04.16.1991, B07B 13/00).

A disadvantage of the known device is the design complexity, high energy consumption, limited maximum particle size of the processed material and the insufficient efficiency of disintegration and classification of clay material.

A known vibrating screen, comprising two inclined surfaces in the form of two steel sheets, forming a V-shaped tray, between the lower edges of which there is a longitudinal slot, the width of which can be adjusted. Sheets are installed with a slope, adjustable using a stepper device. The sheets are freely laid on pedestals moving around the frame with a screw device. Vibration exciters are attached to the sheets below (A.Ya. Tishkov, L.I. Gendlina, S.Ya. Levensok, Yu.I. Eremenko, R.G. Tishkova. Slotted vibrating screen, Institute of Mining SB RAS, Novosibirsk, in the collection “Scientific and practical aspects of the extraction of non-ferrous and precious metals” (reports of an international meeting), Vol. 2, Khabarovsk, 2000).

The disadvantages of the screen are the low efficiency of the disintegration and classification of clay material, and a decrease in productivity in the processing of coarse-grained material, high energy consumption.

The objective of the invention is the intensification of the destruction of clay rocks, increasing the efficiency and productivity of the process, increasing the maximum size of the processed material.

The technical result is the creation of conditions for improving the disintegration of the material and the efficiency of the classification process.

The problem is achieved in that in a roll disintegrator-classifier (VDK), which includes two inclined surfaces mounted on the frame with the ability to control the angle of their inclination and forming a longitudinal adjustable gap, receiving and unloading devices, two inclined surfaces are made in the form of rolls installed with a gap and rotating in opposite directions, and the speed of rotation of one roll is less than the speed of rotation of the second roll, while on the surface of the rolls, along their length, ribs are made in the form of rings, installed staggered, and between the rolls above the gap mounted irrigation system.

These design features of the apparatus compared to the prototype prevent clogging of the screening surface (longitudinal slit) by rock particles, provide rotation of the material located on the surface of the rolls and their abrasion on the roll surface and between each other, the effect of water jets of the irrigation system on the entire surface of the particles, which contributes to disintegration of clay material and increase the efficiency of its classification. At the same time, the maximum size of the processed material is limited by the diameter of the roll, which makes it possible to process material containing boulders with a particle size of up to 1 meter or more at VDK without industrial preparation for size. Roll disintegrator-classifier is shown in the drawings.

Figure 1 is a front view; figure 2 is a top view; figure 3 is a side view, figure 4 is a General view of the VDK.

The roll disintegrator-classifier includes a frame 1, a receiving device for the processed material 2, a receiving device for the under-sieve product 3, a device for unloading the sieve product 4, two inclined surfaces 5 made in the form of rolls rotating in opposite directions, and the rotation speed of one roll is less than the rotation speed the second roll, with the possibility of adjusting their slope, between which there is a longitudinally adjustable slot (gap) 6, an irrigation system 7, each roll has its own turn Nost ribs in the form of rings 8 mounted along their length in a checkerboard pattern.

VDK works as follows:

The source material is fed into the receiving device 2, from which it enters the rolls 5 rotating in opposite directions, mounted on the frame 1 at an angle to the discharge side of the material, the value of which is determined by the type of material being processed. Between the rolls a gap is established (a longitudinal slit of a certain width) 6, through which a fraction of the processed material is discharged into the receiving device 3 with a grain size smaller than the width of the installed slit (gap) 6 (sublattice product). The width of the slit depends on the specified size of the sublattice material. A fraction larger than the width of the installed slit (gap) 6 is unloaded through the device 4 into the dump.

When the material passes along the rollers 4 rotating in opposite directions at different speeds, it intensively rotates and the mineral grains and clay-gravel-sand fractions contained in this material interact with each other while the surface of the material rotating on the rollers is eroded by water jets coming from the irrigation system 7, which ensures effective disintegration and classification of the processed mineral raw materials with obtaining the required size of the under-sieve product, for example health resources to further processing. In this case, when the material passes along the rolls, particle segregation occurs, during which heavier valuable rock particles are concentrated in the roll space, displacing lighter rock grains from there, and these heavy valuable rock particles first enter the sublattice product for further processing.

The design of the inventive roll disintegrator-classifier in comparison with the prototype allows you to:

- to intensify the process of destruction of clay rocks due to abrasion of particles of material on the surface of the rolls and between each other and irrigation with water;

- increase the efficiency of classification;

- increase the productivity of the process as a whole;

- increase the maximum size of the processed material.

Claims (1)

Roll disintegrator-classifier, including two inclined surfaces mounted on the frame with the possibility of adjusting the angle of their inclination and forming a longitudinal adjustable gap, receiving and unloading devices, characterized in that the two inclined surfaces are made in the form of rolls installed with a gap and rotating in opposite directions moreover, the speed of rotation of one roll is less than the speed of rotation of the second roll, while on the surface of the rolls along their length ribs are made in the form of rings mounted in a checkerboard order, and between the rolls above the gap mounted irrigation system.

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