SU1258490A1 - Method of flotation of materials - Google Patents

Description

"1258490

The invention relates to the flotation of various materials and can be used in the enrichment of useful materials, as well as in chemical engineering processes.

The purpose of the invention is to increase the efficiency of flotation of particles of ordinary and increased size by optimizing the hydrodynamic mode of the process and reducing its energy intensity.

FIG. 1 is a schematic diagram illustrating the method; in fig. 2 is a diagram illustrating a variant of the method when operating multiple jets.

The method is illustrated by the example of flotation of sylvinite with particles of increased particle size. In the flotation cell I subshatter is powered with a Solid content up to 90% and a layer 2 of material to be separated is formed on the bottom of the chamber. The height of this layer is chosen so that the nozzle 3, in which quality the ejector can be used, is buried in the material. Through the nozzle 3, a liquid-liquid jet 4 is introduced into the layer of material with the formation of a diffusion zone, i.e., the zone of weighing and moving the material along a closed trajectory. In the fusional operation mode of the gas-liquid jet 4, sylvinite is floated.

The parameters for maintaining the hydrodiffusion mode of the jet are determined according to well-known methods from the field of hydrotransport and erosion of rocks, empirically, for specific conditions.

In the volume of the diffusion zone, aerofokules are formed, which emerge: On the surface of the layer of material and as new bubbles attach, they begin to float to the surface. liquids in chamber I. At the end of flotation, air puffs leave the diffusion zone through the layer of the remaining hydrophilic particles, without being delayed.

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Above the diffusion zone in the pulp volume, quiet ascending pulp-air flows are observed, which contribute to the injection of mineralized bubbles into the foam layer without detaching the floated particles from the bubbles, which significantly intensifies the flotation process, since the known hydrophobic particles from the bubbles in the known flotation methods slow the process. These phenomena contribute to the flotation of particles of increased size.

In the event that the size of the zone

diffusion with a single jet does not ensure the flotation front over the entire chamber area; it is advisable to introduce several gas-liquid submerged jets into the pulp volume, however

the distance between the indicated jets should be taken, as a result, from the condition i R1 + Rg the distance between the jets 5, 6 (adjacent jets); R (is the radius of zone 7 of the diffusion of the jet 5;

R is the radius of the diffusion zone 8, page 6. The fulfillment of this condition makes it possible to spray the entire area of the layer of material being separated, which prevents the loss of useful

component in the chamber product, i.e. all separated material passes through diffusion zones.

In order to gradually move the layer of material being separated from the loading zone to the dispensing nozzle, the bottom of the chamber may have a small slope or the nozzles may have a slight angle to the bottom of the chamber 1. The bottom should be sloped towards

A spigot tube for the chamber product.

As flotation proceeds, the separated material passes through diffusion zones and is freed from hydrophobic particles, which, together with the bubbles, enter the foam layer, and the hydrophilic particles come out of the chamber through the branch pipe.

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Claims (2)

1 . METHOD FLOTATION METHOD-, BW, including the introduction of a gas-liquid flooded stream into the pulp volume from the nozzle in the direction of the chamber bottom, the supply of material to the chamber and the removal of foam and chamber products, which is characterized by the fact that, in order to increase the efficiency of flotation of particles of ordinary and increased particle size due to optimization the hydrodynamic regime of the process and reducing its energy intensity, a layer of material is formed and constantly supported on the bottom of the chamber, and the jet is flooded into it. 2. The method of pop. 1, it is distinguished by the fact that a stream is introduced into the pulp volume by at least two streams, while the distance between the streams is taken on the basis of the following condition: E έ R ₍ + R ₂ , where £ is the distance between streams, R ₍ - diffusion zone radius of the first stream, _R? diffusion zone radius of the second stream. 1 1258490 ²