SU1389856A1 - Installation for foam separation - Google Patents

Abstract

This invention relates to the flotation concentration of minerals, and b. used in ferrous and nonferrous metallurgy. The goal is to improve performance and improve the operational characteristics of the installation. The installation body is divided into a pulp feed chamber (K) 1 and K 2 separations. At the junction with K 2 foam generators 3 with aerators 5, the valve 7 is adjustable in height using a rod 8. A conveyor 12 installed in K 2 with a perforated tape 13 upper branch communicates with a vibrator 14. A pallet 15 with compartments is installed under the upper branch of the conveyor 12 16, 17 for collecting the non-mineralized solution and tailings. The compartment 16 by pipe 18 is connected to the foam generator 3. The discharge device consists of a height-adjustable divider 19 of the froth product and outlet boxes 20, 21 installed at the outlet for the froth product and for tails. Axial impellers 22 are installed at the exit of ducts 20, 21. The pulp from K 1 evenly flows to non-mineralized foam, the height of which is set by damper 7. Passage under the compartment 16 of the tray 15, the foam is dehydrated. Passage over the vibrator 14, under the influence of its oscillations, hydrophilic particles enter the compartment 17 of the pallet 15. The concentrate with the top layer of foam from the tape 13 enters the box 20, the tails into the box 21. 3 Il. i (L

Description

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The invention relates to the flotation concentration of minerals and can be used in ferrous and non-ferrous metallurgy.

The purpose of the invention is to increase the separation performance and improve the operational characteristics of the installation.

FIG. 1 shows an installation for foam separation; in fig. 2 - vibrator; in fig. 3 - belt conveyor with a vibrator.

The installation for foam separation includes a housing divided into chambers for supplying pulp 1 and separation 2, a foam generator 3, an air supply device 4 from an aeroto10

The installation is unproductive. The height of the layer of non-mineralized foam is maintained at a predetermined level with the help of a damper 7, adjustable rod 8, based on the condition: the height of the foam at the exit of the generator is 1.6-7 cm, at the entrance to the unloading device 4-5 cm for sulfide ore or by experience.

In the compartment 16 of the pallet 15, the non-mineralized foam was intensively dehydrated and the non-mineralized solution leaked through the cells of the perforated conveyor belt 13 through the flexible pipe 18 returns to the generator 3. The speed of the conveyor belt along which it is loaded 5, the capacity 6 with the non-mineralized 5 foam pulp is also picked up

The installation is unproductive. The height of the layer of non-mineralized foam is maintained at a predetermined level with the help of a damper 7, adjustable rod 8, based on the condition: the height of the foam at the exit of the generator is 1.6-7 cm, at the entrance to the unloading device 4-5 cm for sulfide ore or by experience.

In the compartment 16 of the pallet 15, the non-mineralized foam is intensively dehydrated and the non-mineralized solution leaked through the cells of the perforated conveyor belt 13 through the flexible pipe 18 returns to the generator 3. The speed of the conveyor belt along which the pulp-loaded foam moves also

a solution containing surface-active substances (surfactants) for feeding the foam generator 3. At the output of the generator 3 is installed, the valve 7 is adjustable in height, movable by means of the rod 8.

To the pulp feed chamber 1, it has been dewatered.

experimentally with the help of a step pulley 23 so that the foam at the discharge device, including a height-adjustable flow divider 19 with receiving boxes 20 and 21, has maxines pipelines for supplying pulp 9 and air 10 and an impeller 11. perforated tape 13 (for example, from a mesh nylon mesh size of 2-3 mm), placed in the separation chamber 2, the upper branch interacts with the vibrator 14. The pallet 15 has D.Lay compartments for collecting the flowing non-mineralized solution 16 and tails 17, while the compartment 1 6 is connected via a flexible pipe 18 to a foam generator 3. The discharge device consists of a height-adjustable divider 19 of the foam product flow and receiving boxes for the foam product 20 and for tails 21. Axial impellers are installed at the outlet of each box

25

thirty

Passing over the vibrator 14 and in contact with it, the belt 13 of the conveyor 12 begins to oscillate at a frequency of 40-60 Hz. Vibration contributes to the passage of hydrophilic particles through a layer of foam, as a result of which the quality of the concentrate is improved, hydrophilic particles pass through inter-bubble channels through a layer of foam and fall into the compartment. 17 of the pallet 15. The dehydrated top layer of foam on the moving belt carries a rich concentrate, and the bottom layer of foam contains tails.

When the vibration frequency is below 40 Hz, retention of fine hydrophilic particles in the foam is observed, which degrades the quality of semi22. Conveyor belt speed regulates concentrate. With vibration frequency

with a stepped pulley 23, and a guide groove 24 is provided for guiding the pulp flow to the conveyor 12. The installation works as follows. The pulp feed chamber 1 enters the pulp 9 processed with reagents, and the conduit 10 receives air, the jet of which is broken by an impeller 11, creating favorable conditions for fixing useful minerals to purity

greater than 60 Hz, the foam on the conveyor belt begins to break down and settle, due to which the hydrophobic particles, together with the breaking foam, are also lowered into the compartment 17 of the pallet 15.

The amplitude of oscillation also affects the performance of the separation process. With an amplitude of less than 3 mm, small hydrophobic particles are not completely removed from the aerated pulp, reducing the quality of air concentration, increasing the lifting force. 5 With an amplitude of vibration greater than 8 mm

destruction of air bubbles in the foam is observed. The concentrate, together with the top layer of foam from the conveyor belt 13, is directed to the duct 20 by means of the flow divider 19, and the tails with the bottom layer of foam -

lu last.

From the chamber 1 for feeding the pulp along the guiding chute 24 aerated, treated with reagents pulp is fed to a moving perforated belt 13

conveyor 12 at a speed (matched

empirically), in which it lies evenly on the non-saline foam that enters the conveyor belt from generator 1. At a high feed rate of aerated pulp, the saline foam is forced through the cells of the conveyor belt and the hydrophobic particles are carried away into the chamber product together with the hydrophilic ones. At a low bullet feed rate

Malno dehydrated.

experimentally with the help of a step pulley 23 so that the foam at the discharge device, including a height-adjustable flow divider 19 with receiving boxes 20 and 21, is maxi5

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Passing over the vibrator 14 and in contact with it, the belt 13 of the conveyor 12 begins to oscillate at a frequency of 40-60 Hz. Vibration contributes to the passage of hydrophilic particles through a layer of foam, as a result of which the quality of the concentrate is improved, hydrophilic particles pass through inter-bubble channels through a layer of foam and fall into the compartment. 17 of the pallet 15. The dehydrated top layer of foam on the moving belt carries a rich concentrate, and the bottom layer of foam contains tails.

At a vibration frequency below 40 Hz, retention of fine hydrophilic particles in the foam was observed, which impairs the quality of the concentrate obtained. With vibration frequency

40

greater than 60 Hz, the foam on the conveyor belt begins to break down and settle, due to which the hydrophobic particles, together with the breaking foam, are also lowered into the compartment 17 of the pallet 15.

The amplitude of oscillation also affects the performance of the separation process. At an amplitude of less than 3 mm, small hydrophobic particles are not completely removed from the aerated pulp, reducing the quality of the concentration. - With a vibration amplitude greater than 8 mm

destruction of air bubbles in the foam is observed. The concentrate, together with the top layer of foam from the conveyor belt 13, is directed to the duct 20 by means of the flow divider 19, and the tails with the bottom layer of foam -

 50 in the box 21.

The height of the flow divider 19 is determined by the results of visual observation of the foam product. In order to accelerate the advancement of the dewatered foam along the inner surface of the ducts, centrifugal fans, one in each, are installed in their unloading part, the air flow from which promotes the advancement of the foam downwards to the discharge opening. Foam falling on the fan blades is completely destroyed.

Using the proposed plant, it is possible to obtain a concentrate, the humidity of which does not exceed 30%, and direct it directly to the filtration, by passing a thickener, which releases additional production plants, adi.

Claims (1)

Invention Formula Installation for foam separation, comprising a housing divided into chambers of pulp supply and separation, connected to the separation chamber a foam generator with an aerial device consisting of a height-adjustable flow divider of the froth product and receiving boxes, in order to increase separation rates and operational characteristics of the installation, it is equipped with a height-adjustable damper located at the junction of the foam generator with the separation chamber, the collection compartment of the non-mineralized solution, under the upper branch 0 of the belt conveyor and communicated with the foam generator, a vibrator installed with the ability to interact with the upper branch of the belt conveyor and axial impellers placed on the exhaust pipes, mounted in the chamber section of the receiving boxes, while the belt or belt conveyor, discharge conveyor made perforated. 14 Yy 13 a device consisting of a height-adjustable divider flow divider and receiving boxes, characterized in that, in order to improve the separation performance and operational characteristics of the installation, it is equipped with a height-adjustable damper located at the junction of the foam generator with the chamber of the section R. - neither, the compartment of collecting the non-mineralized solution installed under the upper branch of the belt conveyor and communicated with the foam generator, the vibrator installed with the possibility of interaction with the upper ve twist conveyor belt and axial impellers, placed at the output of receiving boxes, wherein the conveyor belt is perforated. FIG. 2 J (Boc / nbi 17 Fig.Z