SU1253666A1 - Flotation machine - Google Patents

Description

 The invention relates to devices for flotation of various materials and can be used in the enrichment of mineral raw materials, purification of waste and industrial water, ion flotation, etc.

A flotation machine is known, comprising a flotation chamber with means for withdrawing foam and chamber products and an aerator, made in the form of an impeller, closed on the shaft.

Flotation mappings of this type are characterized by significant energy consumption, the presence of a rotating device, a chute for a foam product, a discharge pipe, a pump and an aerator, installed outside the housing, a pipe for introducing a gas-5 liquid mixture, the machine is equipped with a vertically installed flue, the height is less the height of the chamber separating the latter into flotation and sludge compartments, and a circulation pipe, while the aerator consists of a chamber, a branch pipe for gas and gas, and a nozzle installed with a pipe for introducing g zozhidkos cold mixture, wherein the circulating T

from parts within the flotation chamber, 5 ba is connected to the aerator chamber and

which reduces the reliability of the Maomjai and increases the wear of the aeration block,, and a relatively low ejection coefficient, not exceeding t, -0, which reduces the flotation efficiency due to the limited gas-liquid interface in the chamber. On the other hand, the size of air bubbles produced by using an impeller type aerator, without the use of surfactants, averages 3-4 mm.

A flotation machine is also known, comprising a flotation chamber with a chute for discharging the frothy product and a discharge pipe at the bottom of the chamber, a device for loading into the feed chamber, a pump and an aerator installed outside the chamber and in communication with the tube for introducing a gas-mixture into the chamber.

However, the operation of this machine is characterized by a relatively low amount of air drawn into the flotation chamber, insufficient dispersion of its bubbles, which limits the performance of the machine. On the other hand, the latter cannot ensure the repeated involvement of unplanted particles of the useful component in the flotation process. All this reduces the flotation efficiency.

The aim of the invention is to increase the extraction of the useful component and the productivity of the device by increasing the amount of gas entrained in the chamber, increasing the dispersion of the bubbles of the latter, providing favorable conditions for the contacting of the floated particles with the bubbles and re-engaging the non-floated particles in the flotation process.

The goal is achieved by the operation of turning on the chamber, loading and unloading pipe, and the pump in communication with the nozzle and the sludge compartment.

FIG. 1 shows flotation on maigina, vertical section;

20 of FIG. 2 - the same, top view.

The flotation machine consists of a chamber 1 with a groove 2 for removal of the foam product and a discharge pipe 3 at the bottom of the chamber,

5 4 for loading into the feeding chamber, nos 5, the chambers of the aerator 6 with the nozzle 7, the nozzle 8 for introducing gas into the chamber, the tube 9 for introducing the gas-liquid mixture into the flotation chamber and

30 to.

The flotation chamber 1 is equipped with an overhang installed vertically with a height less than the height of the chamber and destroying it on the flotation 11

35 slurry 12 compartments. The nozzle 8 is connected to a pressure gas duct 13, which in turn is connected to a 1shi blower by a compressor. The circulation pipe reports the aerator chamber 6

40 discharge pipe 3, and the nozzle 7 is in communication with the pump 5 and the pump is in communication with the slurry compartment 12 pipe 14. The flotation chamber can also be equipped with a baffle 15 stream

45 installed under the outlet bore of the pipe 9. A vertical discontinuity 16 is installed in such a way that there would be a gap between its lower end and the bottom, and the drain threshold

50 of the flotation cell was located above the upper end of the indicated partition.

The flotation machine works in the following way.

 When materials float into the chambers of the aerator 6, the gas, in particular air, is supplied through the nozzle 8, and the level 17 of the gas is set in it.

53666

device, chute for removal of frothy product, discharge pipe, pump and aerator installed outside the housing, pipe for gas-liquid mixture 5 inlet, the machine is equipped with a vertically installed partition, less than the height of the chamber and separating the latter into flotation and sludge compartments, and a circulating tube, the aerator consists of a chamber, a gas inlet nozzle and a nozzle, installed with the tube for introducing a gas-liquid mixture, the circulation tube being connected to the aerator chamber and

discharge pipe, and the pump is in communication with the nozzle and the sludge compartment.

FIG. 1 shows a flotation maigina, vertical section; on

ig. 2 - the same, top view.

The flotation machine consists of a chamber 1 with a groove 2 for removal of the froth product and a discharge pipe 3 at the bottom of the chamber,

4 for loading into the feed chamber, the pump 5, the aerator chamber 6 with the nozzle 7, the nozzle 8 for introducing gas into the chamber, the pipe 9 for introducing the gas-liquid mixture into the flotation chamber and

circulation pipe to.

The flotation chamber 1 is provided with a partition mounted vertically with a height less than the height of the chamber and destroying it on the flotation 11 and

slurry 12 compartments. The pipe 8 is in communication with the pressure gas duct 13, which in turn is communicated with the blower 1shi compressor. The circulation pipe informs the aerator chamber 6 s.

discharge pipe 3, and the nozzle 7 is in communication with the pump 5 and the pump is in communication with the slurry compartment 12 by the pipeline 14. The flotation chamber can also be equipped with a flow screen 15,

installed under the outlet of the pipe 9. The vertical partition 16 is installed so that there is a gap between its bottom end and the bottom, and the drain threshold

camera flotation was located above the upper end of the specified partition.

The flotation machine operates in the following way.

During the flotation of materials into the chamber of the aerator 6 through the pipe 8 serves a gas, in particular air, and set the level 17 of the gas liquid in it. In this section, nozzle 7 is supplied with a jet of liquid, which is sucked in by pump 5 from the slurry compartment 12 and is supplied under pressure to the nozzle through conduit 14. Str, striking the gas-liquid section, ejects the gas in the aerator chamber 6 into pipe 9, where additional dispersion of gas bubbles occurs due to the presence of turbulent flows in said pipe. Further, the aerated stream, after exiting the pipe 9 in the flotation compartment, strikes against the barrier 15 and disperses over the entire area of the flotation compartment, with the active mineralization of gas bubbles. Power is supplied to the machine from the top through P1} D. The impact of the high-speed flow coming out of the pipe 9, on the bump stop 15, eliminates the additional dispersion of the gas In the flow. Mineralized gas bubbles float to the surface and form a foam layer, which is discharged through chute 2. We went to the sludge compartment 12, from which we are continuously taken by pump 5 to nozzle 7. Sands and part of the non-sputtered particles of the useful component enter the discharge pipe 3 and due to the higher pressure of the liquid column in the chamber (compared with the liquid column in the aerator), their significant amount

through the circulation pipe 10 to the aerator chamber, where they are jetted and through pipe 9 are again sent to flotation. Due to this, the non-floated particles of the useful component are repeatedly involved in the flotation process. Due to the fact that the liquid enters the nozzle from the psham compartment 12, the pump and nozzle wear is negligible. On the other hand, the nozzle and pump elements can be made of polyurethane compositions possessing high wear resistance. Thus, in the flotation machine, the aerator operates in a closed circuit, which does not require additional water consumption.

In order to compensate for the gas losses in the aeration chamber due to gas ejection by the jet and keeping the gas-liquid level constant, gas is constantly injected into the aerator chamber through the pipe 8. The design described allows aeration using free pressure jets, in which the ejection coefficient exceeds 3, .5,

Tests have shown that the proposed flotation unit on a machine, as compared with a pneumomechanical machine with the same chamber volume, allows an increase in flotation productivity by 45-55% and an increase in phosphate extraction by 2.5-3.8%.

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Editor M.Kelemes Order 4662/12

 fpy. g

Compiled by A. Antonova

Tehred L. Serdyukova 1 (director of clerk V.Sinitska

Circulation 514Subscribe

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Design, 4.

Claims (1)

A FLOTATION MACHINE, including a chamber, a loading device, a chute for the removal of foam product, an unloading pipe, a pump and an aerator installed outside the housing, a pipe for introducing a gas-liquid mixture, characterized in that, in order to increase the recovery of useful component and the productivity of the device by increasing the amount involved into the gas chamber, increasing the dispersion of the bubbles of the latter, providing favorable conditions for the contact of flotated particles with bubbles and re-involvement of non-flotated particles of particles in the flotation process, the machine is equipped with a vertically mounted partition, a height less than the height of the chamber and dividing the latter into the flotation and slurry compartments, and a circulation pipe, the aerator consists of a chamber, a gas inlet nozzle and a nozzle installed coaxially with the gas-liquid mixture inlet pipe moreover, the circulation pipe is connected to the aerator chamber and the discharge pipe, and the pump is in communication with the nozzle and sludge compartment. SU, .., 1253666 (put L