SU1722599A2 - Pneumatic flotation machine - Google Patents

Abstract

The invention relates to the field of enrichment. The goal is to increase the recovery of the beneficial component in the foam product by uniformly distributing the enriched material. A pneumatic flotation machine consists of chamber 1, in the lower part of which aerators 2 are located. Above the chamber along its entire length there is a loading device 3, made in the form of a rotating perforated drum with perforations along its entire length. At the bottom of the chamber 1, a device 4 is disposed for unloading the chamber product. Under the device 3 along the entire length of the chamber 1 in the upper part of it there is a divider 7 of the foam layer. The latter is designed to move across the width of the chamber 1. The pulp, treated with reagents, from the attachment. 3 enters the chamber 1 on the foam layer created by air bubbles leaving the aerator. The useful component is discharged into the foam chute 6. The chamber product is removed through the fixture 4. As the load on the feed changes, the distribution of material along the loading front changes. To align it, the divider 7 is moved to one side or the other along the width of the chamber 1. Zil. B (Foamy product zOZUCH & VJ GO N3 CL 43 43 N3

Description

The invention relates to the flotation enrichment of minerals, namely to the structures of pneumatic flotation machines, and is an improvement of the known pneumatic flotation machine according to the author. No. 1510938.

The known machine includes a chamber, in the upper part of which there is a loading device made in the form of a rotating perforated drum, as well as devices for unloading foam and chamber products.

A disadvantage of the known machine is the impossibility of ensuring uniform specific load across the loading front, as a result of which the extraction of the useful component into the concentrate is reduced. This uneven specific load across the loading front is due to the fact that the enriched material is fed unevenly onto the foam layer in the machine chamber through the drum loading device. The uneven feed of the source material occurs due to the fact that the enriched material is distributed not symmetrically relative to its longitudinal / axis, i.e. from the oncoming side of the loading device, the amount of enriched material will always be greater than from the side running down it.

The purpose of the invention is to increase the extraction of the useful component into the foam product by ensuring the constant specific load along the loading front with an even distribution of the enriched material.

The essence of the developed device is that the machine includes a chamber with aerators in its lower part and a device for unloading the chamber product, while the loading device in the form of a rotating drum with a perforated surface is installed above the camera of the machine.

The holes of the drum are made of different diameters, which increase in the course of the movement of the material from the place of its loading to the discharge device of the foam material. The device further comprises a foam layer divider installed under the loading device in the upper part of the machine chamber along its entire length, as well as a device for moving the divider. The divider of the foam layer is designed to move across the entire chamber of the machine and is connected to a device for moving it.

Figures 1-3 show a pneumatic flotation machine.

The device contains a camera 1, in the lower part of which aerators 2 are installed,

the loading device 3, made in the form of a rotating drum with perforations along its entire length and installed above the camera 1 of the machine along its entire length. In the bottom of the chamber 1 is located fixture

0 4 for unloading the chamber product, on the discharge side of the foam product there is a foam chute 5, above which the discharge device 6 of the foam product is installed, in the chamber of the machine 1 under

5, a loading device 3 along the entire length of the chamber is equipped with a divider 7 of the foam layer, kinematically connected with the device 8 to ensure its transverse movement in the chamber of machine 1.

The operation of the device is as follows.

The original pulp, pretreated with reagents, is fed into the loading device 3, in which the enriched material is classified at the same time as the size of the enriched material and the classified material is fed to the foam layer in

0 camera machine 1, created by supplying air through the aerators 2.

The mineral particles entering the foam layer from the charging device 3 are subjected to flotation enrichment.

5 The useful component in the form of a foam layer is discharged through the discharge device 6, and the chamber product is discharged through the device 4. Performing a loading device in the form of a drum with perforations along its entire length of different diameters ensures that the flotation time (foam separation) of the mineral particles is of their size due to feeding the size-graded material along the entire length of the foam layer into the chamber of the machine 1.

However, when loading mineral particles on the foam layer from the drum loading device 3

0 to ensure the uniformity of the specific load when the performance of the machine varies, as a result of which the extraction of the useful component into the froth product (concentrate) is reduced. This unevenness

5, the loading of the enriched material onto the foam layer is caused by the fact that the starting material inside the drum of the loading device 3 is unevenly distributed: it is more on the incident side and less on the downstream side. This unevenness increases even more with changes in machine performance.

In the proposed machine, under the loading device 3 in the chamber along its entire length a divider 7 of the foam layer is installed. If the specific load on the front of the load becomes uneven, then the divider 7 by means of the device 8 for its lateral movement in the chamber of the machine 1 ensures the division of the foam flow into unequal parts , each of which is proportional to the amount of enriched material supplied to the foam layer.

The offset of the divider 7 relative to the longitudinal axis of the loading device 3 and the camera of the machine 1 ensures the division of the foam layer, as a result of which the uniform load is achieved along the loading front of the camera of the machine 1.

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five

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Studies of the proposed machine with the enrichment of manganese ores have shown that as a result of ensuring uniform loading on the front of the chamber of the machine, an increase in extraction of the useful component in the concentrate by 0.28% was achieved,

Claims (1)

Claims of the invention Pneumatic flotation machine, auth.St. No. 1510938, characterized in that, in order to increase the extraction of the useful component into the foam product due to the uniform distribution of the enriched material, it is provided with a foam layer divider located under the loading device in the upper part of the machine chamber along its entire length and capable of moving along the width of the camera. - & XL / - ig eight FIG. g Q x ir - V -: tshch / 7777 Lsch -  "I U- / 7 ff /// fi // j ,one. .--