SU1002036A1 - Three-product hydraulic cyclone - Google Patents

Description

The invention relates to the enrichment of minerals and can be used in the classification of ore pulps and flotation products, as well as in other areas of the mine-digesters .. industry. A three-product hydrocyclone is known, including a cylindrical body, a tangentially located inlet, a sandbag and two concentrically located drainage pipes with spiral grooves Cl3. The main disadvantage of the known device is that when pulp pressure fluctuates at the entrance of a cyclone, depending on volume pulp, density, condition of the pump. The removal of fine particles through the external discharge pipe increases. The closest in technical essence and the achieved result to the invention is a three-way / cyctivic hydrocyclone, which includes a cylindroconical case, a tangentially located supply nozzle, a sand nozzle and concentrically located external and internal drain nozzles 2. The disadvantage is the low classification efficiency due to the fact that under-roof flow of unclassified material at the entrance to the outer drain pipe goes into the internal drain pipe, which leads to dispersing finer drain which is recovered by pnutrenny through the spout, the large particles. The purpose of the invention is to improve the efficiency of classification by eliminating the ingress of large particles from the podflow flow into the internal discharge nozzle. The goal is achieved by the fact that in a three-product hydrocyclone, including a cylindrical body, a tangentially located supply nozzle, a sand nozzle and concentrically located outer and inner drain nozzles, an opening is made in the wall of the outer nozzle and the center line of which is located at a distance equal to 0.08-0.085 D, the total area of the holes is 0.08-0.09 O, where D is the diameter of the hydrocyclone.

There are at least two holes.

The drawing shows a three-product hydrocyclone.

The three-product hydrocyclone includes a tangentially located supply pipe 1, a cylindrical body 2, a sand hole 3, an external 4 and an internal 5 drain pipe coaxially located. In the wall of the outer drain-, the nozzle is made symmetrical holes b for outputting the scaffold stream.

Three-product hydrocyclone works as follows.

The pulp through the tangentially disposed supply nozzle 1 enters the body 2, where under the action of centrifugal forces material separation occurs according to size, the largest particles are discharged through the sand hole 3. Medium size particles are discharged through the external nozzle 4. and the smallest particles - through the external drain pipe 4.

The underflow flow moves along the walls of the external drainage pipe and is removed through the openings 6. The efficiency of the classification is increased by eliminating ingress and under-roofing flow into the internal drainage pipe. This is possible when removing the subsurface flow through the holes in the external drain pipe. The parameters of openings that allow for the removal of the underfloor flow are determined by the following calculations.

1. Experiments on the model found that the vertical velocity of the under-roof flow moving in from along the outer drainage rail becomes constant at a distance of 0.08-0.085 D from the lower edge of the nozzle, while the velocity is 1 / 16 of the speed at the entrance to the hydrocyclone.

2. The volume of the under-flow is 0.1-0.15 of the volume of the feed.

3. For existing sizes of hydrocyclones, the ratio of the diameter of a hydrocyclone D to the equivalent diameter of the supply nozzle can be taken equal to

4.8

.eq pit

4. In order to eliminate the disturbance of the hydrodynamic regime in the hydro cyclone, the holes in the discharge pipe should be symmetrically located, and their number should be at least two.

Taking into account the fact that the holes in the drain pipe should provide

the output of the total amount of subsurface flow, the area of the holes is calculated as follows:

 0,.

where V is the velocity of the subsurface flow at the level of the holes in the discharge nozzle, / 2 is the flow velocity in the supply nozzle 0

S is the target area of the holes in the drain pipe,

S - the hole area of the supply pipe;

0.15 - the proportion of the podkrivyechnogo flow of the volume of food,

eq

, eq D

With this in mind, we make up the equation;

one . Vf 16,

S 0.15-16-1 (D) 2,

2

those. S 0.0820.

The application of the proposed hydrocyclone allows to increase the classification efficiency up to 15%.

Claims (2)

1. Three-product hydrocyclone, including a cylindrical body, tangentially located supply nozzle, sand nozzle and concentrically located external and internal drain nozzles, distinguishing so that, in order to increase the efficiency of classification by eliminating the mass flow of large particles from the podskhechny flow into the internal discharge nozzle, in the wall of the outer the drain nozzle has holes, the axial line of which is located at a distance from the lower edge of the nozzle equal to 0.08-0.085 O, the total area of the holes is 0.080, 09 D, where P is the diameter of the hydrocyclone. 2, a hydrocyclone according to claim 1, characterized in that at least two holes are made. Sources of information taken into account in the examination 1. USSR author's certificate 604587, cl. B 04 C 5/12, B 03 B 5/34, 1976. 2. USSR author's certificate 770550, cl. B 04 C 5/12, B 03 B 5/34, 1979 (prototype).