SU1676664A1 - Flotation machine - Google Patents

Abstract

This invention relates to the beneficiation of minerals. The goal is to increase the performance of the flotation process by optimizing the conditions for pulp aeration. A loading device 2 is installed in the upper part of the vertical chamber 1 of the machine. A distributor 3 is located below the lower cut of the device 2. In the upper part of the chamber 1 there is a groove 4 for removing the frothy product. In the lower part of the chamber 1 there is a discharge device 5 in which the inlet of the suction pipe 7 is located. The latter is connected to the pump 6 The delivery pipe 12 connects the pump 6 to the aerator 8 located outside the chamber 1 and made of chamber 9 with the nozzle 10 for gas supply and nozzle 11. Chamber 9 communicates with chamber 1 by means of pipe 13 for introducing gas-liquid 2 (L С V V O o ON - &

Description

a mixture located coaxially with the nozzle 11 and the circulation pipe 14 located inside the chamber 1. Inside the chamber 1, a baffle 15 is fixed. The outlet opening of the pipe 13 is located under the baffle 15 and above the center of its inlet. The pulp enters the chamber 1 through the device 2 and the distributor 3 is scattered throughout its cross section. The pump 5 pulp is sucked from the device 5 through the pipe

7, and through the nozzle 12 through the nozzle 11 enters the gas-liquid interface in the chamber 9 created by supplying gas through the nozzle 10. The aerated stream through the pipe 13 enters the chamber 1. Flotation complexes float and are removed into the chute 4. Thanks to the pipe 14 chamber 9 receives a new portion of pulp, the chamber product is discharged through devices 5. 1 sludge.

The invention relates to the enrichment of minerals by the flotation method, in particular, to devices for its implementation, and can be used in the processing of ore or non-metallic raw materials, the purification of stable and industrial waters.

The purpose of the invention is to improve the performance of the flotation process by optimizing the conditions for pulp aeration.

The drawing shows a flotation machine, a vertical section.

The flotation machine consists of a vertical chamber 1 with a loading device 2 in the upper part, below the lower section of which, inside the chamber 1, is located the distributor 3. On the outer side of the chamber 1 in the upper part there is a chute 4 for removing the frothy product. At the bottom of the chamber 1 there is a discharge device 5 in which the inlet of the suction pipe 6 of the pump 7 is placed. Outside the vertical chamber 1 there is an aerator 8 made of chamber 9 with a gas inlet 10 and nozzle 11 connected to the discharge pipe 12 of pump 7 The vertical chamber 1 communicates with the chamber 9 of the aerator 8 by means of a pipe 13 for introducing a gas-liquid mixture and a circulation pipe 14. In this case, the pipe 13 is located coaxially with the nozzle 11, and its outlet opening is located above the center of its inlet Wrists and under the baffle 15. The circulating pipe 14 is made with a cross-sectional area not less than the cross-sectional area of the pipe 13 for introducing a gas-liquid mixture and is placed inside the chamber 1. A pipe 10 for introducing gas is connected to the pressure gas pipeline 16.

Flotation machine works as follows.

The original pulp is fed into the flotation machine from the top through the device 2. Reflected from the distributor 3, the pulp is evenly distributed over the cross section of the chamber 1. Gas ((air) is fed into the chamber 9 of the aerator 8 through the nozzle 10)

required level of gas-liquid interface. A pulping jet is fed to this surface from the nozzle 11, which is sucked by the pump 7 from the discharge device 5 through the pipeline 6 and is fed under pressure to the nozzle 11 through the pipeline 12. Strut, striking the gas-liquid interface, ejects the aerator 8 in the chamber 9 gas. The aerated stream rushes into tube 13, where

additional dispersion of gas bubbles occurs due to turbulent flows. Next, the aerated stream, after exiting the tube 13, hits the baffle 15 and is scattered throughout the chamber cross section.

1, when the flow of the gas-liquid mixture hits the barrier 15, additional crushing of air bubbles occurs. The gas-liquid interface is maintained in chamber 9 of the aerator 8.

the continuous supply of pulp there through the circulation pipe 14. Air bubbles, rising upward along the chamber to the level of the lower edge of the loading device 2, are mineralized, and, rising upward to the upper edge of chamber 1, are freed from randomly adhering particles that cannot be transferred to foam product. Mineralized gas bubbles, floating on the surface, form a foamy

a layer that is led out through the discharge device 5.

The location of the outlet of the pipe 13 above the center of its inlet ensures the occurrence of

differences in pulp densities in chamber 1 and gas-liquid mixture in pipe 13 of the airlift effect, which promotes the movement of gas-liquid mixture through pipe 13. The location of the circulation pipe 14 inside the flotation chamber 1 makes it possible to make it short and with a large cross section circulating fluid movement, the airlift effect and the minimum hydraulic resistance during circulation ensure efficient use of the energy of the working jet directly on ejection of gas and fragmentation, which leads to an increase in the amount of gas is involved in the process, improve its dispersion STI, which in turn increases the technological characteristics of flotation. The opposite direction of the feed and gas-liquid mixtures leads to mutual cancellation of the velocity head and providing a uniform velocity profile of the liquid over the cross section of chamber 1. The pulp intake to form the working jet from the discharge device 5 prevents the pulp velocity asymmetry from creating in the chamber 1 and part of the bubbles in the pump which could reduce the pressure of the working jet. The uniform, symmetrical profile of the pulp velocity eliminates the premature removal of a part of the material from the zone of mineralization of the bubbles and thereby enhances the extraction of the valuable component. Improving the technological performance of the flotation machine is also ensured by the minimum time it enters the normal mode.

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aeration Since, due to the location of the inlet of the suction pipe 7 in the discharge device 5, the working jet can be supplied immediately after the power is applied.

Claims (1)

Invention Formula 5Flotational machine, including a vertical chamber with a loading device located in its upper part and a discharge device located in its lower part, a chute for discharging foam product, a pump with suction and discharge pipes, an aerator located outside the vertical chamber and made of a chamber with a gas inlet and a nozzle, a baffle mounted in the chamber, a pipe co-axially attached to the nozzle for introducing the gas-liquid mixture and a circulation pipe communicating the chamber of the aerator with a vertical chamber, characterized in that increase the performance of the flotation process by optimizing the conditions of pulp aeration, the machine is equipped with a distributor located under the loading device, the outlet 10 pipes for introducing the gas-liquid mixture are located under the baffle and above the center of its inlet, the circulation pipe is located inside the vertical chamber, and the inlet 15 suction pipe is located in the discharge device.