SU1606197A1 - Centrifugal pneumatic flotation machine - Google Patents

Abstract

This invention relates to the beneficiation of minerals. The goal is to increase the performance of the flotation process by optimizing its hydro and aerodynamic conditions, as well as improving the reliability of operation. The housing 1 of the photomachine consists of a cylindrical 2, a cylindrical 3 and a conical 4 parts. Inside part 3 there is an inner perforated wall 8, forming together with its outer wall an air chamber 11. Inside chamber 11 a porous partition 12 is placed. In part 2 of case 1 there is a pipe 7 for removing the foam product and the inlet tangential nozzle (P) 5, in the horizontal plane having the shape of an arc of a circle. Inside P 5, a curvilinear partition 6 is movably disposed. Wall 8 is assembled from grates (K) 9 made of wear-resistant material. With their ends, K 9 is fixed in recesses made in the end rings 10 fastened to the flanges 13 of part 2 of housing 1. In cross section, K 9 are in the form of a combination of a trapezium and two rectangles, the large sides of which are perpendicular to each other. Between themselves K 9 form a gap having a zigzag section. The initial pulp according to claim 5 enters part 2 of body 1, is twisted, after which the flotation complexes float and are removed through pipe 7. The remaining part of the pulp descends in a spiral downward and in part 2 of case 1 is aerated with air bubbles exiting through the partition 12 and the gap between K 9. Flotation complexes float, moving to the axis of the machine, and the remaining pulp enters part 3 of housing 1, where it thickens and is removed from the machine. 1 hp ff, 3 ill.

Description

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of cylindrical 2, cylindrical 3 and conic 4 parts. Inside part 3 there is an inner perforated wall 8j forming an air chamber 11, which forms together with its outer wall. Inside chamber 11 there is a porous partition 12. In part 2 case 1 there is a pipe 7 dp of removing the foam product and an inlet tangential nozzle (P) 5, in a horizontal plane and having the shape of an arc of a circle. Inside P 5, a curvilinear partition 6 is movably disposed, Wall 8 is assembled from grates (KJ 9 made of wear-resistant material. With its ends K 9 fixed in j recesses made in end rings 10 fastened with flanges

13 parts 2 of housing 1. In cross section, K 9 is in the form of a combination of TpjineiuiH and two rectangles, the large sides of which are perpendicular to each other. Between themselves K 9 form a gap having a zigzag section. The original slurry according to claim 5 enters part 2 of the body, twists, after which the flotation complexes float and are removed through pipe 7. The remaining part of the pulp descends in a spiral and in part 2 of case 1 aerates air bubbles exiting through the partition 12 and the gap between K 9. Flotation complexes float, moving to the axis of the machine, and the remaining pulp enters part 3 of housing 1, where it thickens and is removed from the machine. 1 3.P. 3 il.

The invention relates to the enrichment of minerals, in particular to flotation machines, and can be used in the processing of ore and non-metallic raw materials,

The purpose of the invention is to improve the performance of the flotation process by optimizing its hydro and aerodynamic conditions and increasing the reliability of operation.

Figure 1 shows a centrifugal pneumatic machine, a frontal axial slit; figure 2 is a section A-A in figure 1; on fig.Z - y: green I in figure 1 (top view on an enlarged scale).

The centrifugal pneumatic flotation machine consists of a cylindrical conical body 1 consisting of an upper cylinder-1 conical part 1, a middle cylindrical conical part 3 and a lower conical part 4. To the upper cylindrical conical part 2 of the housing 1 there is a tangentially attached inlet 5-Rectangular transverse section 5 having in the horizontal plane the shape of the arc of a circle. A curvilinear partition 6 is movably mounted inside the inlet nozzle 5. A perforated tube 7 is located along the axis of the housing 1 in the upper cylindrical part 2 to remove the frothy product.

The cylindrical part 3 of the housing 1 comprises an outer solid wall and

an inner perforated wall 8 coaxially and with a gap relative to it, assembled from grates 9 having a complex cross section — a combination of a trapezoid with two rectangles, the large sides of which are perpendicular to each other. On the side surface of the grates 9, the tides are made, with which they abut one another, forming a gap along their entire height during assembly. Moreover, in the horizontal plane, this gap has a zigzag section.

The end walls of the grate 9 are profiled along a circular arc. The end of the grate 9 has a square cross section and is fixed in square recesses made in the end rings 10 located between the cylindrical part 3 of the housing 1, the conical part 4 and the cylindrical conical part. In assembly, the grate bars 9 and the end rings 10 form a grateless grid.

Between the outer wall of the cylindrical part 3 of the housing 1 and its inner perforated wall 8 there is an air chamber 11, in which a porous partition 12 is located coaxially with the housing 1. Parts 2–4 of the housing 1 are fastened to each other and with the end rings 10 by means of flanges 13, between which are placed gaskets 14, and bolted connections.

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Gaskets 14 seal the ends of the air chamber 11. From the outer part of the housing 1 to its cylindrical part 3 is attached a pipe 15 for supplying compressed air, communicated with the air,. 11 camera.

Grate bars 9. are made of wear-resistant material, such as manganese steel, by casting in a way for -. Formed a molded box under pressure, the Cylindro-conical and conical parts 2 and 4 of the housing 1 are lined with slabs of silicon or silicon carbide. In the lower part of the conical part .4 of the set I, a sand-core 16 is fixed.

A centrifugal pneumatic flotation machine operates as follows.

The pulp treated with reagents and saturated with air bubbles through jO inlet 5 enters inside the housing 1. Curvilinear partition 6 divides the pulp flow into two streams, one of which, the inner one, contains mineralized bubbles, and 75 the other, the outer one - uncompensated particles. In this case, the first one is fed closer to the axis of the photomachine, and the other is closer to its walls. Airy

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the bubbles with particles fixed on them along with the drain are removed into the perforated pipe 7 to remove the frothy product. Non-floated slurry spirals down into the cylindrical part 3 of the housing 1, where it is aerated by air bubbles coming there from the air chamber 11 through the porous material partition wall 12 and the inner perforated wall 8.

The flotation complexes formed as a result of the meeting of air bubbles minerapiadmi particles, the surface float away through the tube 7. Unflated particles settle in the conical part 4 of the housing 1 and are removed from the 5-ud through the sand nozzle 16.

Centrifugal flotation machine can be installed vertically

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or obliquely. The feed of the pulp to the flotation machine can be carried out by gravity or by means of a pump.

Making the perforated wall 8 in the form of a grating without grid from the grate 9 prevents the pulp from entering the porous partition 12 and clogging it.

Claims (2)

1. A centrifugal pneumatic machine, comprising a cylindrical housing with flanges, located in its cylindrical part of an outer and inner perforated wall, forming an air chamber in which a porous partition is placed, a pipe for removing the frothy product and an inlet connection that differs in that, with the aim of wiping off the indicators of the flotation process by optimizing its hydro and aerodynamic conditions, the inlet port is made in the horizontal plane in the form of an arc of a circle with a partition oh mounted movably, the inner apertured wall of the end rings formed with recesses and grate made of wear-resistant material, the grate bars are fixed at their ends in recesses of end rings and the end rings are connected to the flanges of the cylindrical body portion. 2. A flotomachine according to claim 1, about tl and - so that, in order to increase reliability in operation, the grate in cross section is made in the form of successively conjugated trapezoids and two rectangles, the large sides of which are mutually perpendicular, with This the grate is installed with the formation of a slit with a zigzag section. FIG. 2 FIG 3 A- A - five