SU1452586A1 - Hydraulic classifier - Google Patents

Abstract

The invention relates to the hydraulic classification of particulate materials in an upward flow of fluid and b. used in the mining, chemical, construction industries. The purpose of the invention is to improve the classification efficiency by improving the JJ regulation of the classification process and ensuring a constant grain composition of a large product. The classifier includes a housing 1, a separation chamber (K) 2, a drain chute 3, a collector 4 installed in the lower part of the housing 1 with a perforated bottom 5 and a pallet 6, installed in the pallet 6 a branch pipe (R) 7 of the water supply, feed P 8, unloading of a large product and a hollow cylinder 10 mounted coaxially to housing 1 and embedded in bottom 5 and tray 6. Under the latter is a cone-shaped soil collector 11 with P 12 and 13 for water supply. Coaxially to housing 1 above cylinder 10 with the formation of an end gap 15, are installed K 16 separations from P 17 for outputting a small product in its upper part. The original pulp according to P 8 enters the classifier, in which the path along "(L et al 00 05

Description

water through P 7 above the bottom 5 creates a fluidized bed of classified material. Drain with a small product enters the chute 3, a large product through the gap 15 -

into cylinder 10 and the soil collector 11. Drain K 16 through P 17 is discharged into a small product. As a large product accumulates in the ground receiver, it is unloaded. 1 il.

one

The invention relates to the hydraulic classification of granular materials in an upstream fluid flow and can be used in the mining, chemical, construction, and other industries.

The purpose of the invention is to improve the efficiency of classification by improving the regulation of the classification process and ensuring a constant grain composition of a large product.

The drawing shows a hydraulic classifier, a vertical section.

The hydraulic classifier comprises a housing 1, a separation chamber 2, a drain chute 3, a collector 4, a perforated bottom 5, a pallet 6, a nozzle 7 for supplying water, a loading nozzle 8 installed using radial plates 9. A hollow cylinder 10 is located axially to the body 1 built into the bottom 5 and the pallet 6. Under the latter there is a cone-shaped soil collector 11 with nozzles 12 and 13 for water supply. Coaxially with the housing 1 above the hollow cylinder 10, an additional cylindrical separation chamber 16 with a nozzle 17 for outputting a small product in its upper part is installed using radial plates 14 to form an end gap 15.

The device for unloading a large product consists of a diaphragm 18, an adjusting cone 19 placed in it, which is mounted on a lever 20 mounted on a hinge 21. The lever is raised to a stop screw 23 by means of a spring 22. On hinges 24 and 25 by means of a hook 26 is suspended Measles electromagnet 27 tons lean type. The body of the electromagnet is rigidly fixed to the supporting metal. The discharging device is sealed with a circular rubber apron 28, lowered on the bottom of tray 29. A piezometric tube 30 with a vessel 31 is welded to the upper point of the soil collector 11 and the upper 32 and lower 33 sensors of the electronic liquid level indicator 34 (ESA) are installed. The original slurry is supplied to the classifier through pipe 35, the flow rates of water are regulated by valves 36 and 37. The hydraulic classifier works as follows.

Ighoppa pulp through pipe 35 through control unit 8 enters the classifier. By

By supplying water through the pipe 7 over the perforated bottom 5, a fluidized bed of the material to be classified is created. The drain of the classifier with the small product enters the drain chute 3. Large product through the end gap 15 enters through the hollow cylinder 10 into the cone-shaped soil collector I. With the help of valves 36 and 37, the water flow is set correspondingly

an additional separation chamber 16 and a soil collector 11. The discharge of an additional separation chamber 16 through the nozzle 17 can be diverted into a small product or into a vat of the initial product. When the hydraulic classifier is put into operation, the sensors 32 and 33 are bare and the ESA 34 turns on the electromagnet 27, the lever 20 raises the cone 19 to the upper position, in which the discharge gap of the diaphragm 18 is designed to pass a large product less than the classifier's performance.

0 As the large product accumulates in the classifier, the liquid level in tube 30 and vessel 31 rises, first reaching sensor 33 and then sensor 32, after which the ESA 34 sends a signal to turn off electromagnet 27. With the help of spring 22, lever 20 lowers the cone 19 into the lower position at which the unloading gap of the diaphragm 18 is designed for unloading a large product more performance classifier. Origin t

0 a decrease in the quantity of a large product in the classifier and a decrease in the level of liquid in the vessel 31. After the sensor 33 is exposed, the ESA sends a signal to turn on the electromagnet. Then the cycle of operation of the hydraulic classifier is repeated.

5 Classifier productivity, pulp costs through the loading nozzle 8 and water through the collector 4 are set so that in case 1 with a low content of fine fractions in the source material in the fluidized bed the specified accuracy of separation into coarse and fine products is ensured, and through nozzle 12 into the primer box set the minimum possible water flow, ensuring the normal operation of the discharge device.

5 With an increase in the content of small classes in the source material in the case, the previously established optimal mode of operation is preserved, but the large product entering the face gap 15 has a natural increase in the content of fines. In order to obtain a coarse product with a predetermined grain composition, its adjustment is performed in the upstream of the additional separation chamber. In the event of an increase in fines content in a large product, the flow of water through nozzles 12 and 13 into the soil collector increases, which provide an upward flow.

Claims (1)

Invention Formula Hydraulic classifier, comprising a housing, a separation chamber, a loading nozzle, a drain chute, a collector installed in the lower part of the housing with a perforated bottom and a tray, a mouth a water supply nozzle in the pallet, a hollow cylinder coaxial to the body and embedded in the perforated bottom and the sump, and a device for unloading a large product, characterized in that, in order to improve the classification efficiency by improving the regulation of the classification process, and ensuring a constant grain a coarse product, it is equipped with a cone-shaped soil collector located under the pallet with nozzles for water supply and an additional cylindrical separation chamber with a nozzle for output of the small product in its upper part, installed coaxially with the housing above the hollow cylinder with the formation of the end gap.