SU1671355A1 - Method for lump separation of raw materials - Google Patents

Abstract

The invention relates to methods of raw material separation by-bite, can be used to enrich ores and mining chemical raw materials during bite-separation and allows to increase the reliability of the separation of lumps by improving the hydrodynamic properties of the fluid. When implementing this method, water or an aqueous suspension is used as a diverting agent. A jet of diverting agent is continuously fed from the source of the diverting agent towards the separation zone. In this case, the flow of the diverting agent jet into the separation zone is stopped in the air gap, and the jet stream reflected from the partition wall is diverted along its surface to the sides of the separation zone. 1 pf-ly, 2 ill.

Description

The invention relates to methods of raw material separation by-bite and can be used for enrichment of ores and mining and chemical raw materials during bite-separation.

The purpose of the invention is to increase the reliability of separation of the pieces by improving the hydrodynamic properties of the fluid.

Figure 1 and 2 shows a diagram of the device that implements this method.

A flowable diverting agent is supplied to the source 1 of the diverting agent by a centrifugal pump, the jet 2 of which is supplied continuously in the direction of the separation zone 2. Due to the conoidal profile, the nozzle 4 forms a flat continuous jet 2 along the entire length of its initial section overlapping the separation zone. Stream 2 is oriented across the path.

5, free movement of piece 6 and directed vertically from top to bottom.

The method is used for material-by-piece separation, in which at first the presence of a useful component is established in the pieces and signals are generated that are directed to the step of separating the pieces to an actuator containing, for example, electromagnets 7 and 8 (Figures 1 and 2). Before entering the separation zone 3, piece 6, which is to be displaced from the motion path 5, electromagnets 7 and 8 are supplied with command signals, the electrical current pulse is applied to the electromagnet 7 and the electric current pulse to the electromagnet 8 simultaneously stops, which causes the spools 9 to switch and 10. In this case, the compressed air enters the cylinders 11 (the second cylinder 11 in Figures 1 and 2), and the air is collected from the cylinders 12 (the second cylinder 12 is not shown)

N

ate

Returns to the atmosphere The pistons 13 and 14 located opposite in the cylinders are pairwise connected by two rods 15, on which the lower part of the deflector 16 is fixed. Moving the pistons 13 and 14 to the right leads to the release of the jet 2 from the lower part of the deflector 16 during the time interval ri. maintain the time interval for filling the separation zone 3 with a jet 2, which is determined from the ratio of 1, 2 (005 + d) + h sheni G2 - 4 tons, - - -,

where (O.OS + d) is the height of the separation zone, (m), h is the height of the jet deflection zone 17,

(m);

1,2 - constant coefficient

0.05 is a constant number;

d - maximum piece size (m)

Wc — jet velocity of the diverting agent 2, (m / s)

The time spent on the displacement of piece 6 (Fig. 1) is summed from the time interval ri to free the jet from the bottom of the deflector 16, the time interval Г2 to fill the separation zone 3 with a jet 2, the time interval gz to the intersection of a partition 6 of the separation zone 3, which determined by the ratio

d

-yy: -, where d is the maximum size of a piece,

WK

(m); 6 - jet thickness 2 at the exit of the nozzle 4. m WK piece speed, m / s

Before entering the separation zone 3 of piece 18 (Fig. 2), which is not subject to displacement from the motion path 5, electromagnets 7 and 8 receive command signals, and an electrical current pulse is applied to the electromagnet 8. The electrical current pulse to the electromagnet 7 is terminated. When the spools 9 and 10 are switched, compressed air enters the cylinders 12, and the air from the cylinders 11 is vented to the atmosphere. By moving the four pistons 13 and 14 to the left together with the two rods 15, the lower part of the deflector 16 deflects the jet 2 and discharges e to the side of separation zone 3 for a period of time l. Stream 2 acquires rotational movement between the 16 lower and upper 19 parts of the deflector, made in the form of grooves equipped with a longitudinal blade 20. The deflected jet 2 is led out through the open ends of both parts of the deflector. Before the intersection by piece 18 of the separation zone 3, the time interval T2 is maintained for exiting the remaining jet in the separation zone. The specified time interval has been established.

is equal to the time interval T2 for filling the separation zone 3 with the jet 2. It is also accepted that the piece 18 intersects without displacement the separation zone 3 in 5 time interval rz equal to the time interval rz required for displacing from the path of the fragment 6 18, which are not subject to displacement, are carried out during the time of the year l + G2 + tz. The stages of displacing the pieces from the trajectory and the stages of movement of the non-rejected pieces are taken equal in time

Example 1. Pieces of off-balance anthracite with a particle size from 100 to L0 mm are subjected to separation. Water is supplied to the source of the diverting agent under a pressure of 0.33 MPa. A water jet 2 (Figures 1 and 2) is continuously fed in the direction of the separation zone 3 at a speed of 24 m / s. By means of the conical profile of the nozzle 4, a flat continuous jet 2 is formed along the entire length of its initial section, which overlaps the separation zone 3. Stru 2 is oriented transversely to the trajectory 5 of the free piece 6 and is directed vertically from top to bottom. The thickness of the jet 2 (at the exit of the nozzle 4) is 26 mm, width 100 mm, i.e. maximum piece size. The speed of movement of the piece before entering the separation zone 3 is 9 m / s, the average distance between the pieces of 360 mm when feeding 25 pieces per second to the separation zone. The proposed piece separation method is used for off-balance anthracite off-balance separation, in which the presence of anthracite in the piece is first established, and signals are generated that are directed to the piece separation stage - to an actuator containing electromagnets 7 and 8, before entering the separation zone 3 (Fig .1) a piece 6. to be displaced from the trajectory 5 of movement to the electromagnets 7 and

8, command signals are received, and an electric current pulse is applied to the electromagnet 7 and the electric current pulse to the electromagnet 8 stops. This causes the spools to switch

9 and 10, in which compressed air enters the cylinders 11 and the air from the cylinders 12 is vented to the atmosphere. Pistons 13 and 14 are pairwise joined by two rods 15, on which the lower part of the deflector 16 is fixed. Moving the pistons 13 and 14 to the right leads to the release of the jet 2 from the lower part of the deflector 16 (FIG. 1) during the time interval t. 0.015 s. After the release of the jet 2 additionally

20

25

thirty

35

40

45

50

55

maintain a time interval for filling the separation zone 3 with a jet 2. This time interval is 0.011 seconds.

, g 1.2 (0.05 + 0.1) + 0.08 P1 (i.e., G2 J, where 0.1 m is the maximum size of the piece; 0.08 m is the height of the deflection zone of the jet 2 by the lower part of the vent 17; 1.2 is a constant coefficient ; 24 m / s - jet outflow velocity; (0.05 + 0.1) m - height of separation zone 3. The displacement time of piece 6 from the trajectory of movement in separation zone 3 is 0.014

01 + 0 026 s (i.e. Q-, where 0.1m is the maximum

piece size; 0.026 m - jet thickness 2; 9 m / s - the speed of movement of the piece b in front of the separation zone). Thus, the step of deflecting piece 6 is carried out in a total time rx of 0.040 s (i.e. ri + r2 + r3 0.015 + 0.011 + 0.014).

Before entering the separation zone 3, piece 18 (Fig. 2) not moving from the trajectory 5, the electromagnets 7 and 8 send command signals, and an electric current pulse arrives at the electromagnet 8 and the electric current pulse stops at the electromagnet 7. In As a result, the spools 9 and 10 are switched, compressed air enters the cylinders 12, and the air from the cylinders 11 is released into the atmosphere. By moving the pistons 13 and 14 to the left, the lower part of the deflector 16 deflects the jet 2 over a period tV of 0.015 s. The strut 2 acquires a rotational movement between the lower 16 and the upper 19 part of the deflector, made in the form of grooves, equipped with a spatula 20. The deflected jet 2 retracts the open ends of both parts of the deflector. Until the intersection by piece 18 of separation zone 3 is maintained, the time interval T21 is 0.0108 seconds to exit the separation zone of the remaining jet in it. Piece 18 intersects displacement separation zone 3 from the trajectory for an interval of time r3 equal to 0.014 s. Stages of passage

through the separation zone 3 of piece b, not subject to displacement, are carried out

for time, yyy + ri + gz, equal to 0.040s. The steps of shifting piece 6 from the path and the step of passing the non-deflected piece 18 are assumed to be equal. The pieces displaced from the path and the non-deflected pieces are assembled in separate bins, the shifted pieces containing a useful component.

The use of the invention improves the reliability of the separation of the pieces.

Claims (1)

Claims The method of picking the raw material, which involves feeding the pieces to the trajectory of movement and jetting the fluid to the pieces to be sampled, characterized in that, in order to increase the reliability of the separation of the pieces by improving the hydrodynamic properties of the fluid, water is used as the fluid. water suspension with a density in the range of 1.10-1.18 kg / m, while the pieces to be displaced are exposed to a jet flowing at a speed of 22-24 m / s. eleven g s AND 14 5 figure 1 L 15 3