CN220378334U - Circulation sand discharging system of metal tailing thickener - Google Patents

Abstract

The utility model discloses a circulating sand discharging system of a metal tailing thickener, which comprises a thickener cone bottom and a main sand discharging pipe with a first valve, wherein the bottom end of the thickener cone bottom is connected with a main sand discharging pipe with a second valve, and the inner end of the main sand discharging pipe is connected with the outer end of the main sand discharging pipe. At least one sand discharge port is arranged on the side wall of the cone bottom of the thickener, the sand discharge port is connected with a sand discharge branch pipe with a branch pipe valve, and the other end of the sand discharge branch pipe is connected with the inner end of the total sand discharge pipe. The utility model designs the sand discharge branch pipe, and circularly discharges sand with the main pipeline, thereby solving the problem of difficult sand discharge caused by the hardening of the tailing compression of the thickener. By circularly discharging sand in different areas, the slurry discharged in each cycle is formed by mixing mortar with different concentrations in a filling area, and fluctuation among the slurry concentrations discharged in each cycle is obviously reduced, so that the stable sand discharge of the thickener is realized, and the caking degree of the tail sand in the thickener is further reduced.

Description

Circulation sand discharging system of metal tailing thickener

Technical Field

The utility model belongs to the technical field of sand discharge of a metal tailing thickener. Relates to a circulating sand discharging system of a metal tailing thickener.

Background

The deep cone thickener has the advantages of small occupied area, large underflow concentration, capability of realizing continuous thickening and the like, has been widely applied to metal mines, and plays a key role in ensuring continuous and efficient filling of mine tailings.

In the filling process, because the tailings contain a large amount of fine mud, the fine mud has certain viscosity, the tailings are very easy to form an annular colloid layer at the bottom of the thickener, and the colloid layer is stuck at the bottom of a cone of the thickener, so that the sand discharge is unsmooth, and the concentration and the flow of underflow are unstable, thereby influencing the filling quality. In addition, the concentration difference of the tailings at different heights of the cone part of the thickener is obvious, and if the tailings are discharged from the bottom part of the cone only, the concentration fluctuation of the mortar sent to the filling area is large along with the sand discharging operation.

The method solves the problems of unsmooth sand discharge and unstable underflow in a circulating sand discharge mode and is a relatively effective technical means. For example, chinese patent publication No. CN217119433U discloses a "deep cone thickener for preparing fine-grain-level high-concentration tailing mortar". The lower end of the cylinder body of the deep cone thickener is connected with a plurality of sand discharge cones. The upper ports of the sand discharge cones are flush, and the lower ports of the sand discharge cones are respectively connected with a sand discharge pipe. The slurry wall-hanging problem is solved by utilizing the self pressure formed by slurry in the sand bin to bottom slurry and free vortex power for sand discharge, generating a plurality of funnels in the same sand bin by circularly changing the sand discharge position, and utilizing the principle that the funnels are mutually staggered to damage the funnel wall, so that the volume utilization rate of the sand bin is improved, the instability of sand discharge concentration and discharge is avoided, and the purposes of improving the sand discharge efficiency, reducing the labor intensity and improving the automation level of filling operation can be achieved through multipoint simultaneous sand discharge and automatic control. Practical application finds that the deep cone thickener for preparing fine-grain-level high-concentration tailing mortar still has unsatisfactory points, mainly comprising: firstly, the cone part of the thickener needs to be greatly modified, a plurality of small cones are added, the structural design and the preparation process are complex, and the preparation cost is high. Second, the disclosed patent only pays out sand from the bottom of the cone, and as the sand-discharging operation proceeds, the concentration of mortar delivered to the filling area fluctuates greatly.

Disclosure of Invention

The utility model aims to solve the technical problems of difficult sand discharge and easy blockage of a sand discharge pipe caused by viscosity and hardening after compression of tailings in a metal tailing thickener; secondly, the circular sand discharge of the cone part of the thickener at different heights is realized, and the filling mortar with more stable concentration is provided.

The technical scheme of the utility model is as follows:

the utility model provides a metal tailing thickener circulation sand discharging system, includes thickener cone end and has the total sand discharging pipe of first valve, and the bottom of thickener cone end is connected with the main sand discharging pipe that has the second valve, total sand discharging pipe inner with the outer end of main sand discharging pipe is connected, at least one sand discharging port has been seted up on the lateral wall of thickener cone end, sand discharging port is connected with the sand discharging branch pipe that has the branch pipe valve, the lower extreme of sand discharging branch pipe with total sand discharging pipe inner is connected.

Preferably, when more than two sand discharge openings are formed in the side wall of the cone bottom of the thickener, the sand discharge openings are different in height.

Preferably, the sand discharging system further comprises a high-pressure water pump and a water pipeline with a water inlet end connected with the high-pressure water pump; the water outlet end of the water pipeline is connected with the inner end of the total sand discharge pipe and is communicated with the lower end of the sand discharge branch pipe; and a third valve is arranged on the water pipeline.

Preferably, the water pipeline is provided with a one-way valve.

Preferably, the water line has a pressure transmitter mounted thereon.

Preferably, the sand discharging system further comprises a controller; the controller is respectively connected with the first valve, the second valve, the third valve, the branch pipe valve, the high-pressure water pump and the pressure transmitter in a communication way.

The utility model has the positive effects that:

firstly, aiming at the problems that sand discharge is difficult and a sand discharge pipe is easy to block due to the fact that tailings in a thickener are sticky and hardened after compression, the utility model designs at least one (such as three) sand discharge branch pipe which is used for circularly discharging sand with a main pipeline, and solves the problem that sand discharge is difficult due to the fact that tailings are sticky and hardened after compression of the thickener. The openings of the sand discharge branch pipes are arranged in different areas in the cone bottom of the thickener, for example, three sand discharge branch pipes are arranged at 120 degrees in a overlook angle, sand is discharged in different areas in a circulating mode, slurry discharged in each circulation is formed by mixing mortar with different concentrations in a filling area, fluctuation among the concentration of the slurry discharged in each circulation is obviously reduced, stable sand discharge of the thickener is achieved, and the caking degree of tailing in the thickener is further reduced.

In the optimization technical scheme of the system, a high-pressure water pipeline is added, a high-pressure water pump is started before sand is discharged, and the tailings at the bottom of the thickener are activated through the high-pressure water, so that sand is discharged more easily; after filling, the high-pressure water pipeline can be used for cleaning the total sand discharging pipe, so that the method is very convenient.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

In the figure: 1. the cone bottom of the thickener; 2. a valve A; 3. a valve C; 4. a total sand discharge pipe; 5. a first valve; 6. a second valve; 7. a valve B; 8. a one-way valve; 9. a third valve; 10. a pressure transmitter; 11. a water line; 12. a high pressure water pump; 13. and a controller.

Detailed Description

The utility model is described in detail below with reference to the drawings and examples.

Referring to fig. 1, an embodiment of a circulating sand discharging system of a metal tailing thickener comprises a thickener cone bottom 1 of a deep cone thickener, wherein the bottom end of the thickener cone bottom 1 is connected with a main sand discharging pipe with a second valve 6. The present embodiment also comprises a main sand discharge pipe 4 with a first valve 5. The inner end of the total sand discharging pipe 4 is connected with the outer end (namely the lower end in fig. 1) of the main sand discharging pipe, and the outer end of the total sand discharging pipe 4 is used for being connected with a filling area or connected with the filling area through a filling pipeline.

Three sand discharge ports with different heights are formed in the side wall of the cone bottom 1 of the thickener, the three sand discharge ports are respectively connected with a sand discharge branch pipe with an A valve 2, a B valve 7 and a C valve 3, and the other end (namely the lower end in fig. 1) of the sand discharge branch pipe is respectively connected with the inner end of the total sand discharge pipe 4. The valve A2, the valve B7 and the valve C3 are branch pipe valves.

Further, the embodiment further comprises a high-pressure water pump 12 and a water pipeline 11 with a water inlet end connected with a water outlet end of the high-pressure water pump 12. The water outlet end of the water pipeline 11 is connected with the inner end of the total sand discharge pipe 4 and is communicated with the other end of the sand discharge branch pipe. The water pipe 11 is provided with a third valve 9.

Further, the water pipe 11 is also provided with a pressure transmitter 10 and a check valve 8.

To achieve automatic control, embodiments of the present utility model may also include a controller 13. The controller 13 is respectively in communication connection with the first valve 5, the second valve 6, the third valve 9, the valve A2, the valve B7, the valve C3, the high-pressure water pump 12 and the pressure transmitter 10.

The working procedure of this embodiment is exemplified as follows:

the filling and sand discharging operation of the embodiment of the utility model comprises the following steps of: main activation, main sand discharge, A branch activation, A branch sand discharge, B branch activation, B branch sand discharge, C branch activation and C branch sand discharge. The above steps are cyclically carried out. And after the sand discharge is finished, cleaning the pipeline.

Main activation and main sand discharge: first, the second valve 6 and the third valve 9 are opened, the first valve 5 is closed, and then the high-pressure water pump 12 is started to perform the top water activation before sand discharge. After 5-10 minutes, the high-pressure water pump 12 and the third valve 9 are closed, and the first valve 5 is opened to start main sand discharge.

Activating the branch pipe A and discharging sand from the branch pipe A: and closing the second valve 6 and the first valve 5, opening the third valve 9 and the valve A2, starting the high-pressure water pump 12, and performing top water activation before sand discharge. After 5-10 minutes, the high-pressure water pump 12 and the third valve 9 are closed, the first valve 5 is opened, and the sand discharge of the branch A is started.

B branch pipe activation and B branch pipe sand discharge: and closing the valve A2 and the valve B5, opening the valve B7 and the valve B9, starting the high-pressure water pump 12, and performing top water activation before sand discharge. After 5-10 minutes, the high-pressure water pump 12 and the third valve 9 are closed, the first valve 5 is opened, and the sand discharge of the branch B pipe is started.

C branch pipe activation and C branch pipe sand discharge: and closing the valve B7 and the valve C5, opening the valve C3 and the valve C9, and starting the high-pressure water pump 12 to perform the top water activation before sand discharge. After 5-10 minutes, the high-pressure water pump 12 and the third valve 9 are closed, the first valve 5 is opened, and the sand discharge of the branch pipe C is started.

And (3) cleaning a pipeline: and closing the second valve 6, the valve A2, the valve B7 and the valve C3, opening the third valve 9 and starting the high-pressure water pump 12 to clean the total sand discharge pipe 4.

During the top water activation, the controller 13 collects the working pressure in the water pipeline 11 in real time through the pressure transmitter 10, if the working pressure is too low, the controller 13 controls the high-pressure water pump 12 to pressurize, and if the working pressure is too high, the controller 13 controls the high-pressure water pump 12 to depressurize.

Claims (6)

1. The utility model provides a sand system is put in circulation of metal tailing thickener, includes thickener awl end (1) and has total sand pipe (4) of putting of first valve (5), and the bottom of thickener awl end (1) is connected with the main sand pipe that has second valve (6), total sand pipe (4) inner with the outer end of main sand pipe is put, its characterized in that: the side wall of the cone bottom (1) of the thickener is provided with at least one sand discharge port, the sand discharge port is connected with a sand discharge branch pipe with a branch pipe valve, and the lower end of the sand discharge branch pipe is connected with the inner end of the total sand discharge pipe (4).

2. The metal tailings thickener circulation sand discharge system of claim 1, wherein: when more than two sand discharge openings are formed in the side wall of the cone bottom (1) of the thickener, the sand discharge openings are different in height.

3. The metal tailings thickener circulation sand discharge system of claim 1, wherein: the sand discharging system further comprises a high-pressure water pump (12) and a water pipeline (11) with a water inlet end connected with the high-pressure water pump (12); the water outlet end of the water pipeline (11) is connected with the inner end of the total sand discharge pipe (4) and is communicated with the lower end of the sand discharge branch pipe; the water pipeline (11) is provided with a third valve (9).

4. A metal tailings thickener circulation sand removal system as claimed in claim 3, wherein: the water pipeline (11) is provided with a one-way valve (8).

5. A metal tailings thickener circulation sand removal system as claimed in claim 3, wherein: the water pipeline (11) is provided with a pressure transmitter (10).

6. The metal tailings thickener circulation sand removal system of claim 5 wherein: the sand discharging system also comprises a controller (13); the controller (13) is respectively in communication connection with the first valve (5), the second valve (6), the third valve (9), the branch pipe valve, the high-pressure water pump (12) and the pressure transmitter (10).