SU1146088A1 - Apparatus for fine sieve classification - Google Patents

Abstract

DEVICE FOR TONK CATTLE CLASSIFICATION, containing cylindrical housing, coaxially arranged in the housing cylindrical sieve with a conical bottom, nozzles for pulp and water inlet and sand removal in the lower part of the body, a drain nozzle and an overflow device, a diffuser with a regulator above the pulp inlet, a system water supply to the sieve in the form of a conduit with perforated w tubes arranged parallel to the forming sieve, characterized in that, in order to reduce the labor intensity of the installation and disassembly of the sieve and increase ezhnosti operation Device:-keeping, the latter is provided with annular diaphragms connecting the sieve with a cylindrical housing part, and with a conical bottom, while the drain side Pathrusim located at the bottom of the housing.

Description

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00 The invention relates to the enrichment of minerals and is intended for the separation of materials by size, and can also be used in the ceramic, chemical, food, pharmaceutical and glass industries in the separation of abrasive powders. A device for separating a mixture of bulk material by permeation is known, containing two cones facing each other with large bases, between which there is a sieve, with a nozzle for removing fines and an inlet nozzle for cleaning the sieve in the upper cone, and a pallet in the lower cone for the collection of a coarse separation product CO. The drawbacks of the device are low productivity due to the cyclical action and significant wear of the sieve. The closest to the invention in technical implementation and the achieved result is a device for sieve classification, containing a cylindrical body coaxially arranged in the body of a cylindrical sieve with a conical bottom, nozzles for entering the slurry and into the holes and removing sand in the lower part of the body of the drain nozzle and the overflow device , a diffuser with a regulator for the nozzle of the pulp inlet, a water supply system and a sieve in the form of a conduit with perforated tubes arranged in parallel forming the sieve, with this m rotating conduit is effected by elec tromehanicheskogo actuator C2. A disadvantage of the known device is the laboriousness of replacing the sieve due to the complexity of its mounting system and the maintenance of the conduit drive assembly due to the removal of part of the classification products in the upper part of the device. The purpose of the invention is to reduce the complexity of installation and dismantling of the sieve, increasing the reliability of the device. This goal is achieved by the arrangement for fine sieve classification, comprising a cylindrical body, a cylindrical sieve coaxially located in the body with a conical bottom, nozzles for 88, 2 pulp and water inlet and sand removal in the lower part of the body, a drain nozzle and a overflow device, diffuser with a regulator above the nozzle of the pulp inlet, the water supply system and the sieve in the form of a conduit with perforated tubes arranged in parallel forming the sieve are equipped with ring membranes connecting the sieve to the cylinder -cylindrical body portion and a conical bottom, wherein the spout is located at the bottom of the housing. FIG. 1 shows a diagram of the device proposed in FIG. 2 section A-A in FIG. 1. The device consists of a conical 1 and a cylindrical 2 housing parts 3. The conical part 1 consists of an outer cone 4 and an inner conical bottom 5. A tube 6 passes through the axis of the device to supply water to. flushing. Inside the device, there is a sieve 7, which is connected to the xdglass part 2 and to the conical bottom 5 at the top by means of ring membranes 8 and 9 and the ring shells 10 and 11. distribution tubes 14 and perforated rubber tubes 15 with punched holes 16. Splashes 13 are driven by rotation from a drive 17 mounted on frame 18 by means of a shaft 19 with windows 20. Bearing, node 21 through which passes through 19, is rigidly connected to the water supply 12. The drive housing is closed 21. Within the cylindrical part of the fixed tube 22 and the overflow there is an overflow device 23. The lower housing portion coaxially arranged nozzle 24 for supplying a power source, a branch pipe 25 for removing sand and pipe 26 to remove fines. The pipes 24 and 25 are supplied with additional water through the pipes 27 and 28. The pipes for removing sand 25 and the fine fraction 26 are equipped with taps 29. The pipe 24 introducing the original pulp is installed, with a diffuser 30 with a regulator 31 of its position. The principle of classification in the proposed device is as follows. J, Water is supplied through pipe 6 and the drive 17 is turned on. A rotatable spatter 13 with perforated tubes 15 directs a jet of water to clean the cells on the inner surface of the sieve 7. Bottom through pipe 24 is introduced under the pressure of the original pulp, to be classified according to a given boundary grain. Climbing up the conical part 1, the rate of ascent of the pulp flow decreases, large particles fall out of it, which descend downwards and along the outer cone 4 fall into the sand removal pipe 25. In this case, the coarse fraction is moved n supplied through the pipe 28 with water. Using the diffuser 30, by adjusting the height of the regulator 31, the size of the gap between the cone 4 and the edge of the diffuser 30 and the ratio of the outlets of the small and large fractions, t, e, are adjusted. The efficiency of the classification. Cranes 29 regulating the ratio of the outputs of the divided fractions serve the same purpose. After the coarse grains are deposited, the slurry under pressure is directed to the sieve 7 where the sieve classification is carried out. Particles that pass through the sieve are partially removed through the upper discharge pipe 22, and partly through the nipple 26. To clean the sig 7 cells from clogging grains of the section of material, through the pipes 15, water is fed to the sieve under pressure, which washes away sediment. Depending on the concentration of solids in the pulp, the rotational speed of the squirting 13 and the water consumption for cleaning the sieve 7 can be changed. The number of perforated rubber tubes 15 also contributes to this. When the water is suddenly turned off, the puncture holes 16 in the tubes 15 spontaneously close under the pressure of the pulp outside and the sieve water supply system is prevented from clogging. . The advantages of the invention include reducing the complexity of replacing a worn sieve 7 by squeezing it up without disassembling the sieve cleaning system and the possibility of increasing the working area of the sieve due to a decrease in its weight. In addition, the fastening of the sieve 7 shells 10 and 11 inside the annular membranes 8 and 9 is simple and reliable in operation. When applying the pulp under pressure, the screen 7 is hermetically pressed against the frame. The application of the invention in comparison with the known device will reduce downtime by 15-20%, increase the working surface of the sieve by five times while reducing the cost of manufacturing one device by 8.3 thousand rubles.

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Claims (1)

THIN Sieve Classification Device, comprising a cylindrical housing, a cylindrical sieve coaxially arranged in the housing with a conical bottom, nozzles for introducing pulp and water and removing sand in the lower part of the housing, a drain nozzle and an overflow device, a diffuser with a regulator above the nozzle for introducing pulp, a feed system water to the sieve in the form of a conduit with perforated tubes parallel to the sieve forming, characterized in that, in order to reduce the complexity of mounting and dismounting the sieve and increase reliably As the device operates, the latter is equipped with annular membranes connecting the sieve with the cylindrical part of the housing and with a conical bottom, with a drain pipe located in the lower part of the housing. SU „..1146088 1 1146088, 2