SU1741914A1 - Pneumatic column flotation machine - Google Patents

Abstract

Usage: mineral processing. SUMMARY OF THE INVENTION: The machine consists of a chamber 1 with aerators 2 at the bottom. In the upper part of chamber 1, an expander 4 is fixed on its end face in the form of an inverted truncated pyramid. The two opposite side walls 5 of the expander 4 are adapted to vary their installation angle with respect to its smaller base. When changing the load on the machine by changing the angle of inclination of the walls 5, the surface area of the foam layer in the expander 4 is adjusted. 2 Il.

Description

The invention relates to the enrichment of minerals by the flotation method, and more specifically to the structures of pneumatic column flotation machines.

A known design of a pneumatic column of a flotation machine, comprising a chamber with air dispersants installed in its lower part, discharge devices for foam and chamber products.

A significant drawback of the known design of the flotation machine is the relatively low recovery of the useful component into the concentrate due to the impossibility of providing the required specific surface of the foam layer to the pulp flow entering the flotation.

The known design of a pneumatic column of a flotation machine, including a chamber with aerators, in the upper part of which, in the cleaning zone, is an expander in the form of an inverted truncated cone.

A significant disadvantage of this machine is the relatively low extraction of the useful component into the concentrate due to the impossibility of providing the required specific surface of the foam layer to the pulp flow entering the column flotation.

The purpose of the invention is to increase the recovery of the useful component in the concentrate.

The goal is achieved by providing the required specific surface of the foam layer to the pulp flow entering the flotation.

The column of the flotation machine includes a chamber with aerators, in the upper part of which, in the cleaning zone, an expander with double-sided foaming of enriched material is designed as an inverted truncated pyramid

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changing the installation angle of the side walls (two opposite side walls on the side of foam removal) of the expander relative to the smaller base of the expander, while the two opposite side walls of the expander are made with the possibility of changing their installation angle relative to the smaller base of the expander and are kinematically connected with the device for changing their installation angle

FIG. Figure 1 shows the pneumatic column of the flotation machine in FIG. 2, an axonometric image of the expander coupled to the cylindrical chamber of the machine.

The device includes a chamber of the machine 1 with aerators 2 installed in its lower part, an unloading device for chamber product 3 at the outlet of the chamber of machine 1, an expander 4, made in the form of an inverted truncated pyramid in the upper part of the chamber of machine 1, two side opposite walls of which are made the ability to change the angle of the installation relative to the smaller base with the help of the device 6.

The operation of the column machine is carried out as follows.

The pulp preprocessed with reagents is fed to the enrichment in the upper part of the chamber. 1, air flows out of the aerators 2 from the bottom in the form of bubbles, in which case a counter-current flotation column process takes place, as a result of which the frothy enriched material is discharged through the side walls 5 of the expander 4, and the chamber product is removed through the device 3. the component in the column machine has a specific surface of the foam layer, i.e. the ratio of the area of foam layer to the volume of the machine chamber: m / m.

When the flotation machine is operating, the pulp flow rate for enrichment does not remain constant over time. Hence the need for all changes in the flow rate of the pulp entering the flotation to provide the required specific surface of the foam layer. For this, during the operation of the machine, the consumption of the pulp supplied to the flotation is determined, and depending on its change from the nominal value, i.e. increase or decrease

change the surface of the foam layer in the expander 4. This is achieved by changing the installation angle of the two opposite side walls of the expander 5 using the tool B. Fixture b, changes the installation angle of the side walls 5 relative to the smaller base of the expander 4. larger) base extender 4, i.e. area changes

the surface of the foam layer. At the same time, the volume of the machine chamber also changes; however, the volume of the machine chamber varies very little, i.e. by changing the installation angle of two opposite side walls

5, the expander 4 achieves a significant change in the specific surface of the foam layer in the expander 4, which ensures an increase in the efficiency of the flotation process. Thus, the device allows for all changes in the pulp flow rate as in

in the direction of increasing, and in the direction of decreasing it, to ensure the constancy of the specific surface of the foam layer.

To determine the effectiveness of the developed device in comparison with the prototype, comparative studies were carried out in the enrichment of manganese ores. The results of the studies showed that the developed pneumatic flotation column

The machine, by providing the required specific surface of the foam layer, allows to increase the extraction of manganese in the concentrate by 0.65%.

Claims (1)

Invention Formula A pneumatic column flotation machine, comprising a chamber with aerators and an expander mounted on the upper end of the chamber and made in the form of an inverted truncated pyramid, characterized in that, in order to increase the extraction of the useful component, the two opposite side walls of the expander are capable of changing their angle installations 0 relative to its smaller base. a / 5 - - .-. - - - - - / - / U Editor A. Ber “IR. 2 Compiled by V.M. Ioffe Tehred M. MorgentalKorrektor A.Osaulenko product Chamber product