CN216866776U

CN216866776U - Coarse tailings filling device

Info

Publication number: CN216866776U
Application number: CN202220546557.5U
Authority: CN
Inventors: 尹旭岩; 郑伯坤; 黄腾龙; 彭亮
Original assignee: Changsha Institute of Mining Research Co Ltd
Current assignee: Changsha Institute of Mining Research Co Ltd
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2022-07-01
Anticipated expiration: 2032-03-14

Abstract

The utility model discloses a coarse tailings filling device, which comprises a cyclone for receiving tailings slurry of a plant selection, a paste storage thickener connected with the overflow end of the cyclone, and a vibrating screen connected with the underflow end of the cyclone; the paste storage thickener is internally provided with a compressed air slurry making device, the bottom flow end of the compressed air slurry making device is connected with a stirring device, and the input end of the stirring device is respectively connected with a coarse sand feeding device, a cement feeding device, a thickening water feeding device and a modified low-density adding device for adding a foaming additive. Through the mode, the tail sand grading device is simple in structure, can be used for grading the tail sand, avoids the problems of hardening and the like when the tail sand is dense, and ensures smooth preparation of the filling slurry through the air compressing slurry making device and the modified low-density adding device.

Description

Coarse tailings filling device

Technical Field

The utility model relates to the technical field of mine filling, in particular to a coarse tailings filling device.

Background

Under the current theme of green and environment-friendly production and processing, the tailing discharge treatment of a mine tailing pond is extremely important. The tailings produced by different factories have different particle sizes due to the differences of ore properties, mineral processing processes, mineral processing equipment and the like of different mines, and the difference of the particle sizes of the tailings has great influence on the tailing concentration link. For tailings with medium and coarse grain sizes and with the grain sizes below, the concentration equipment such as a vertical sand silo, a deep cone thickener or a paste storage thickener can be adopted to obtain higher underflow concentration and realize smoother sand discharge. For tailings with larger particle size, if the content of tailings with particle size larger than 0.1mm is larger than 60%, although the sedimentation efficiency is higher and higher underflow concentration can be obtained, the coarse tailings are often deposited and hardened in the bin body during sand discharge, sand discharge cannot be performed smoothly, even if wind or water is used for making slurry, smooth and stable sand discharge cannot be realized, and the production operation is greatly influenced.

The prior art provides a full tailings graded restructuring slurry reconstruction technology, which divides full tailings into coarse sands and fine sands through a cyclone, carries out water filtration treatment on the coarse sands, carries out thickening treatment on the fine sands through a deep cone thickener, inputs underflow after the coarse sands and the deep cone thickener are thickened into a stirring device, and prepares filling slurry after stirring. Although the technology carries out grading treatment on the coarse and fine tailings, the problem that the coarse sand is hardened in the thickener can be avoided to a certain extent. However, this technique has several problems: the first deep cone thickener has uneven and unstable sand discharge; secondly, the thickening condition in the deep cone thickener cannot be directly observed, and the tailing sedimentation and overflow backwater conditions cannot be monitored in real time; thirdly, the prepared full tailings filling slurry has higher density, and the static pressure of a conveying pipeline is high due to height difference during conveying, so that pipe explosion, spray pipes and other conditions are easy to occur.

Therefore, it is necessary to design a coarse tailings filling device which can perform graded treatment on coarse and fine tailings, is convenient to observe by a thickener, has good sand discharging effect of the thickener, has good filling slurry conveying safety and ensures safe production of mines.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems, the utility model provides a coarse tailings filling device which can be used for grading tailings, drying the graded coarse tailings, thickening the graded fine tailings, avoiding the problems of hardening and the like when the coarse tailings are thickened, and ensuring the smooth preparation of filling slurry through a pneumatic slurry making device and a modified low-density adding device.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a coarse tailings filling device comprises a cyclone for receiving tailings slurry of a plant selection, a paste storage thickener connected with the overflow end of the cyclone, and a vibrating screen connected with the underflow end of the cyclone; the paste storage thickener is internally provided with a compressed air slurry making device, the bottom flow end of the compressed air slurry making device is connected with a stirring device, and the input end of the stirring device is respectively connected with a coarse sand feeding device, a cement feeding device, a thickening water feeding device and a modified low-density adding device for adding a foaming additive.

Furthermore, a central cylinder is arranged at the top end of the paste storage thickener, the central cylinder is respectively connected with the overflow end of the cyclone, the filtrate output end of the vibrating screen and the flocculant dosing machine, and a glass window is arranged on the outer peripheral wall of the paste storage thickener along the vertical direction.

Furthermore, the underflow end of the paste storage thickener is connected with one end of a high-concentration underflow input pipeline, and the other end of the high-concentration underflow input pipeline is connected with a tail mortar measuring hopper arranged at the top end of the stirrer.

Further, the air compressing and slurry making device is arranged at the bottom end of the inner cavity of the paste storage thickener, and the bottom of the paste storage thickener is connected with an air compressor pipeline so as to input high-pressure air into the paste storage thickener.

Furthermore, the thickening water feeding device comprises a high-level water tank connected with an overflow end pipeline of the paste storage thickener, the high-level water tank is connected with the input end of the stirring device through a thickening water input pipeline, and a thickening water flow valve is arranged on the thickening water input pipeline.

Further, modified low-density interpolation device includes measurement and adds the pump and both ends respectively with measurement adds the pump and the interpolation pipeline that agitating unit is connected.

Further, cement feeder includes the cement bin, set up in the rotary impeller feeder of the bottom in cement bin and set up in the screw conveyer of rotary impeller feeder below, screw conveyer with agitating unit pipe connection.

Furthermore, the top end of the cement bin is provided with a feed inlet, and the feed inlet is connected with a cement tank car through a dust blowing pipe.

Further, grit feeder is including being used for the transportation the loader of the grit under the shale shaker sieve and being used for receiving the proportioning machine of the grit of loader transportation, the proportioning machine with set up in the grit weighing hopper on agitating unit top is connected.

Furthermore, the bottom end of the stirring device is connected with an input end pipeline of the blanking hopper, and an output end of the blanking hopper is connected with an underground dead zone pipeline.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the coarse tailing filling device, the tailing slurry is graded through the cyclone, the graded coarse tailing is screened to be dry, and the graded fine tailing is thickened through the paste storage thickener, so that the problems of hardening, difficult sand discharging and the like when the coarse tailing is thickened can be effectively avoided; in addition, this application adopts static measurement cycle preparation technology, and it is to the fixed quantity input in the agitating unit through metering device control to coarse tailings and fine tailings after the stage treatment to with cement and accent dense water to the fixed quantity input in the agitating unit, make every addition of filling ground paste all can accurate control, in order to obtain higher preparation concentration, and prepare more stably.

2. According to the coarse tailings filling device, the grain size of the whole tailings can be redistributed by adjusting the addition amounts of the coarse tailings and the fine tailings, filling bodies with different strengths can be obtained under the condition that the sand-lime ratio is not changed, the requirements of different mining methods are met, the using amount of cementing materials can be reduced, and the filling cost is saved.

3. According to the coarse tailings filling device, the air compressing and slurry making device is arranged in the paste storage thickener, and compressed high-pressure air is input into the paste storage thickener by the air compressor, so that air compressing and slurry making are carried out in the thickener, and homogenization and stabilization sand discharging are realized.

4. According to the coarse tailings filling device, the modified low-density adding device is arranged, the metering adding pump is used for adding the foaming type additive into the stirring device, so that the tailings filling slurry prepared by the stirring device is enabled to adsorb gas to increase the content of micro bubbles, the density of the tailings filling slurry is greatly reduced, the effect of reducing the static pressure of the whole deep well conveying pipeline is realized, the pressure-reducing and resistance-increasing conveying of the filling slurry is realized, and the situations of pipe explosion, spray pipes and the like are prevented.

Drawings

FIG. 1 is a schematic view showing the construction of a coarse tailings packing apparatus of the present invention;

the components in the drawings are numbered as follows: 10. a swirler; 20. vibrating screen; 30. a paste storage thickener; 31. a compressed air slurry making device; 32. a central barrel; 33. a glass window; 34. an air compressor; 35. a flocculating agent dosing machine; 40. a high-level water tank; 50. a cement bin; 51. a vane feeder; 52. a screw conveyor; 60. a loader; 61. a batching machine; 70. a metering addition pump; 71. an addition pipe; 80. a stirring device; 81. and (7) discharging the hopper.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and processing steps closely related to the scheme of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.

In addition, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Examples

As shown in fig. 1, a coarse tailings filling apparatus 100 includes a cyclone 10 for receiving mill tailings, a paste storage thickener 30 connected to an overflow end of the cyclone 10, and a vibrating screen 20 connected to an underflow end of the cyclone 10. The cyclone 10 grades the tail mortar of the plant selection, and sends the graded underflow coarse sand to the vibrating screen 20, and sends the graded overflow fine sand to the paste storage thickener 30. The paste storing thickener 30 is internally provided with a compressed air slurry making device 31, and the underflow end of the compressed air slurry making device is connected with the stirring device 80 so as to convey the thickened underflow into the stirring device 80. The input end of the stirring device 80 is respectively connected with the coarse sand feeding device, the cement feeding device, the thickening water feeding device and the modified low-density adding device for adding the foaming type additive, so that the filling slurry is prepared after all the components are stirred.

So set up, carry out hierarchical processing to the tailings sand through swirler 10, the thick tailings sand after will grading sieves futilely to the thin tailings sand after will grading passes through lotion storage thickener 30 and is dense, appear hardening, the difficult scheduling problem of sand discharging when can effectively avoiding thick tailings sand dense. In addition, the device adopts a static metering period preparation process, the coarse tailings and the fine tailings after the grading treatment are controlled by the metering device to be input into the stirring device 80 in a fixed amount, and the cement and the concentration-regulating water are input into the stirring device 80 in a fixed amount, so that each addition amount of the filling slurry can be accurately controlled, higher preparation concentration can be obtained, and the preparation is more stable.

As shown in fig. 1, in some embodiments, the grit feeding apparatus includes a loader 60 for transporting grit under the screen of the shaker 20, and a compounder 61 for receiving the grit transported by the loader 60. The vibrating screen 20 dehydrates the bottom flow of the cyclone 10, coarse sand left on the upper part of the vibrating screen 20 falls into a coarse tailings storage yard, and filtrate obtained after the bottom flow is filtered by the vibrating screen 20 is pumped into the paste storage thickener 30 by a slurry pump. The batching machine 61 is connected with the coarse sand weighing hopper arranged at the top end of the stirring device 80, so that quantitative blanking of coarse sand is realized. So set up, the underflow of swirler 10 is carried to shale shaker 20 and is carried out dehydration, and the coarse sand after the dehydration falls to thick tail sand storage yard, and the filtrating behind the filtration is pumped to paste storage thickener 30 in through the sediment stuff pump.

In some embodiments, as shown in fig. 1, the paste storage thickener 30 is provided in a cylindrical configuration with a central barrel 32 at its top end. The central cylinder 32 is connected to the overflow end of the cyclone 10, the filtrate output end of the vibrating screen 20, and the flocculant dosing machine 35, so that the filtrate of the vibrating screen 20, the overflow of the cyclone 10, and the flocculant are sufficiently mixed, and efficient flocculation settling and overflow clarification are realized under the action of the flocculant. The outer peripheral wall of the paste storage thickener 30 is provided with a glass window 33 along the vertical direction, so that the liquid level and the sedimentation condition in the paste storage thickener 30 can be observed, and the sedimentation and overflow backwater conditions of the tail sand are monitored.

The underflow end of the paste storage thickener 30 is connected with one end of a high-concentration underflow input pipeline, and the other end of the high-concentration underflow input pipeline is connected with a tail mortar measuring hopper arranged at the top end of the stirrer, so that the quantitative proportioning of the high-concentration underflow is realized.

As shown in fig. 1, in some embodiments, the compressed air slurrying device 31 is disposed at the bottom end of the inner cavity of the paste storage thickener 30, and the bottom of the paste storage thickener 30 is connected to the air compressor 34 through a pipeline to input compressed high-pressure air into the paste storage thickener 30, so that compressed air slurrying is performed in the thickener to achieve homogenization and stabilization of sand discharge.

As shown in fig. 1, in some embodiments, the concentration-adjusting water feeding device includes a high-level water tank 40 connected to an overflow end pipeline of the paste storage thickener 30, and the high-level water tank 40 can return the overflow water of the paste storage thickener 30. The high-level water tank 40 is connected with the input end of the stirring device 80 through a concentrated water adjusting input pipeline, and a concentrated water adjusting flow valve is arranged on the concentrated water adjusting input pipeline so as to realize the quantitative proportioning of the concentrated water.

As shown in fig. 1, in some embodiments, the modified low-density adding device comprises a metering pump 70 and an adding pipeline 71, both ends of which are respectively connected with the metering pump 70 and the stirring device 80. The metering addition pump 70 adds foaming additives into the stirring device 80, so that the tailing filling slurry prepared by the stirring device 80 adsorbs gas to increase the content of micro bubbles, the density of the tailing filling slurry is greatly reduced, the effect of whole static pressure reduction of a deep well conveying pipeline is realized, the pressure reduction and resistance increase conveying of the filling slurry is realized, and the situations of pipe explosion, spray pipes and the like are prevented.

As shown in fig. 1, in some embodiments, the cement feeding device includes a cement bin 50, a wheel feeder 51 disposed at a bottom end of the cement bin 50, and a screw conveyor 52 disposed below the wheel feeder 51, and the screw conveyor 52 is in pipe connection with the stirring device 80, so as to achieve the quantitative proportioning of cement. Particularly, a feed inlet is formed in the top end of the cement bin 50, the feed inlet is connected with a cement tank truck through a dust blowing pipe, and cement can be added into the cement bin 50.

As shown in FIG. 1, in some embodiments, the bottom end of the stirring device 80 is connected to the input end of the blanking hopper 81, and the output end of the blanking hopper 81 is connected to the downhole vacant zone pipe. The bottom end of the lower hopper 81 is connected to a pipe passing through a drilled hole drilled at the top end of the underground dead zone, so that the prepared filling slurry in the stirring device 80 is conveyed into the underground dead zone.

The following describes a specific operation of the present application:

the cyclone 10 grades the mill tail mortar, and sends the graded underflow to the vibrating screen 20, and sends the graded overflow to the central cylinder 32 of the paste storage thickener 30. The underflow of the cyclone 10 is dewatered in the vibrating screen 20, the dewatered coarse sand falls into a coarse tailings dump, and the filtered filtrate is pumped to a central cylinder 32 of a paste storage thickener 30 by a slurry pump. Then, a flocculating agent is added into the central cylinder 32 of the paste storage thickener 30, so that the filtrate of the vibrating screen 20, the overflow of the cyclone 10 and the flocculating agent are fully mixed, and efficient flocculation sedimentation and overflow clarification are realized under the action of the flocculating agent. Subsequently, the overflow of the paste storage thickener 30 is conveyed to the high-level water tank 40, and the underflow thereof is conveyed to the stirring device 80. Meanwhile, the thickening water in the high-level water tank 40 and the cement in the cement bin 50 are both conveyed into the stirring device 80, and the loader 60 conveys the dewatered coarse sand to the proportioning machine 61 and then discharges the dewatered coarse sand into the stirring device 80. Finally, the stirring device 80 stirs each component at a high speed and delivers the prepared filling slurry into the empty area under the well.

The above description is only for the purpose of illustrating the technical solutions of the present invention and is not intended to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; all the equivalent structures or equivalent processes performed by using the contents of the specification and the drawings of the present invention, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The coarse tailings filling device is characterized by comprising a cyclone (10) for receiving tailings slurry of a plant selection, a paste storage thickener (30) connected with an overflow end of the cyclone (10), and a vibrating screen (20) connected with an underflow end of the cyclone (10); the paste storage thickener (30) is internally provided with a compressed air slurry making device (31), the bottom flow end of the compressed air slurry making device is connected with a stirring device (80), and the input end of the stirring device (80) is respectively connected with a coarse sand feeding device, a cement feeding device, a thickening water feeding device and a modified low-density adding device for adding foaming additives.

2. The coarse tailings filling device according to claim 1, wherein a central cylinder (32) is arranged at the top end of the paste storage thickener (30), the central cylinder (32) is respectively connected with an overflow end of the cyclone (10), a filtrate output end of the vibrating screen (20) and a flocculant dosing machine (35), and a glass window (33) is arranged on the outer peripheral wall of the paste storage thickener (30) along the vertical direction.

3. The coarse tailings filling apparatus according to claim 2, wherein the underflow end of the paste storage thickener (30) is connected to one end of a high-concentration underflow input pipe, and the other end of the high-concentration underflow input pipe is connected to a tailings hopper provided at the top end of the stirring apparatus (80).

4. The coarse tailings filling device according to claim 3, wherein the compressed gas slurry making device (31) is disposed at the bottom end of the inner cavity of the paste storage thickener (30), and the bottom of the paste storage thickener (30) is connected with an air compressor (34) through a pipeline so as to input high-pressure gas into the paste storage thickener (30).

5. The coarse tailings filling device according to claim 1, wherein the thickening water feeding device comprises a high-level water tank (40) connected with an overflow end pipeline of the paste storage thickener (30), the high-level water tank (40) is connected with an input end of the stirring device (80) through a thickening water input pipeline, and a thickening water flow valve is arranged on the thickening water input pipeline.

6. The coarse tailings filling apparatus according to claim 1, wherein the modified low-density addition apparatus includes a metering addition pump (70) and an addition pipe (71) having both ends connected to the metering addition pump (70) and the stirring apparatus (80), respectively.

7. The coarse tailings filling apparatus according to claim 1, wherein the cement feeding apparatus comprises a cement silo (50), a blade feeder (51) provided at a bottom end of the cement silo (50), and a screw conveyor (52) provided below the blade feeder (51), the screw conveyor (52) being in pipe connection with the stirring apparatus (80).

8. The coarse tailings filling apparatus according to claim 7, wherein a feed port is provided at the top end of the cement silo (50), and the feed port is connected with a cement tanker through a lance pipe.

9. A tailings filling apparatus according to claim 1, wherein said grit feeding apparatus comprises a loader (60) for transporting grit under the screen of said vibrating screen (20), and a batching machine (61) for receiving grit transported by said loader (60), said batching machine (61) being connected to a grit weighing hopper provided at the top end of said stirring apparatus (80).

10. A coarse tailings filling apparatus according to claim 1, wherein the bottom end of the stirring device (80) is connected to the input end of the lower hopper (81) via a pipeline, and the output end of the lower hopper (81) is connected to the underground dead zone via a pipeline.