SU753470A1 - Apparatus for conditioning flotation pulp - Google Patents

Description

The invention relates to the field of mineral processing, in particular, to devices that prepare the enriched material for the flotation process.

A known apparatus for conditioning the flotation pulp, made in the form of a cylindrical body, inside of which is installed a mixer with pulp reducers and a reamer 1.

A significant drawback of such an apparatus is the supply of reagents into the volume of flotation polydisperse pulp. Due to the fact that under the conditions of modern water-sludge schemes of coal preparation plants, the flotation feed density decreases sharply from 180 to 80 g / l, the reagent consumption increases. In this case, the probability of a solid particle colliding with a drop of insoluble apolar-heteropolar reagents is reduced.

As the consumption of reagents increases, their residual concentration in flotation waste increases, which in turn causes pollution of the environment.

Of the known apparatus for conditioning the flotation pulp, the closest to the technical essence is a device that includes a cylinder-conical body with a tangential mouth, an updated pipe for feeding the original pulp and a discharge pipe inside which the reagent sprayer 2 is located.

The aim of the invention is to intensify the conditioning process of dense 10 pulps.

It is achieved due to the presence of a chamber mounted concentrically to the housing with a gap and a mixer placed in the lower part of the device, as well as due to the presence of ribs on the inner surface of the conical part of the chamber.

FIG. 1 is a general view of a conditioning apparatus; FIG. 2 - section A-A of FIG. one.

The device consists of a body 1, to the cylindrical part of which the nozzle 2 is tangentially connected to supply the initial pulp. In the lower part of the device are the discharge nozzles 3.

A reagent is supplied to the conical part 4 of the device body via a pipe 5, at the end of which a reagent sprayer 6 is installed. On the inner surface of the cone part of the body there are fins 7. The device is equipped with a chamber 8 installed with a gap 9 relative to the body 1, and a mixer 10, from where through the outlet, an adjustable non-pressure valve 11 pulp enters the discharge nozzles 3. In the lower part of the body 1 there is a nozzle 12 for emergency discharge of pulp, in the upper part of the body there is a glass 13 for thin x pulp fractions.

The conditioning apparatus operates as follows.

Through the tangential nozzle 2, the original pulp is fed to the inner cylindrical part of the housing 1. Due to the tangential supply of the coarse-grained part of the pulp is pressed against the cylinder walls and lowered into the conical part 4 of the chamber 8, on the walls of which there are radial ribs 7. The presence of the ribs contributes to the removal and division of the coarse-grained Separate jets to which reagents are fed through pipe 5 and through sprayer 6. Dividing the flow into separate jets intensifies the process of treating the surface of particles with reagents.

The thinner part of the pulp due to centrifugal forces developed at the time of the initial pulp feed is discharged through the cup 13 into the annular gap 9, and together with the coarse-grained part enters the mixer 10. The lower part of the mixer 10 is made in the form of a multifaceted truncated pyramid. The number of faces is equal to the number of outlets 3. In the mixer 10, the streams are moved, fine particles adhere to the large minerals of the carrier, which is the coarse-grained part of the pulp formed by the reagents.

The prepared pulp through outlet openings adjustable by a free-flow valve 11 enters the discharge pipes 3 and further into the flotation machines. For emergency release of pulp from the device, a nozzle 12 is provided.

The use of such a device makes it possible to reduce by 1.5–2 times the consumption of reagents, reduce their residual concentration in flotation waste and thereby reduce the pollution of water bodies and the environment, increase the upper limit of the size of the floatable material and improve technological performance. The concentrate yield increases by 0.5 ° / o, the ash content of the waste increases by 3-4% and the ash content of the concentrate decreases.

by 0.2-0.3 "/ o.

Claims (2)

1. A device for conditioning the flotation pulp 0 comprising a body cylinder-conical shape with a tangentially installed pipe for supplying the original pulp and a discharge pipe inside which the reagent dispenser is located, characterized in that, in order to intensify the process of conditioning dense pulps, it is equipped with a chamber installed concentrically with the housing with a gap and a mixer located at the bottom of the case . O 2. A device according to claim 1, characterized in that the inner surface of the conical part of the chamber is provided with fins. Sources of information taken into account in the examination of S 1. USSR Copyright Certificate No. 430893, cl. B 03 D 1/14, 1973. 2. USSR author's certificate number 492307, cl. B 03 D 1/14, 1974.