A phosphorite underground water sump sludge treatment system

Abstract

The utility model relates to the technical field of mine silt treatment, disclose a kind of phosphate mine underground silt treatment system, it includes mine cleaning machine, mine vibrating screen and stirring device, vibrating screen box is set on the feed hopper of the pumping mechanism of mine cleaning machine above, its inside is provided with the screen mesh of screen hole aperture 30-40mm, the discharge port of the pumping mechanism is connected with material conveying pipeline, and the discharge port of material conveying pipeline is connected with the feed inlet of mine vibrating screen;The first feed inlet of the stirring device is communicated with the fine material discharge port of mine vibrating screen, and the second feed inlet is connected with cementing material feeding device, water inlet is connected with water supply device, and discharge port is communicated with discharge pipeline, and the outlet end of discharge pipeline is inserted into goaf;The screen mesh of the vibrating screen of mine is 10-20mm in screen hole aperture.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment technology in mine water storage tanks, specifically to a sludge treatment system for underground water storage tanks in phosphate mines. Background Technology

[0002] The underground water tank is the core hub of the mine drainage system. It collects groundwater and production water (such as dust removal water) flowing from various working faces and roadways through drainage ditches or pipes, and allows it to settle. The settled impurities (silt) accumulate at the bottom of the water tank, requiring periodic dredging; otherwise, the normal operation of the water tank will be affected. Currently, water tank dredging methods include:

[0003] (1) Manual dredging: First, the water in the water tank is drained, and then workers enter the water tank and use tools such as shovels and scrapers to shovel the silt into sacks or mine cars. They then carry the silt out of the tank by shoulder or push it by hand or pull it out with a winch. After the water is drained, the silt is transported to the goaf or hoisted to the ground for storage. This method is labor-intensive, inefficient, and the silt spills along the way, polluting the environment.

[0004] (2) Mechanical dredging: Using mechanized dredging such as loaders and scraper conveyors can reduce the labor intensity of workers and speed up the dredging process. Compared with manual dredging, the efficiency is greatly improved. However, due to the limited space of the water tank, the mechanical dredging operation is often not fully utilized, which is very inflexible. The dredging effect is generally poor, and there is still a problem of mud spilling along the way and polluting the environment during transportation.

[0005] (3) Hydrocyclone dredging: A complete set of sludge cleaning and filter press equipment is used. The material is slurried and sucked up by water jet, pumped out of the chamber through pipeline, and separated into solid and liquid by the filter press. The clean water flows back to the water tank, and the dry material is transported to the ground for storage. This method solves the problem of difficult sludge dredging and sludge spillage along the way, which pollutes the environment. However, this method also has high requirements for the filter press equipment, which seriously affects the service life of the filter press equipment.

[0006] During phosphate mining, fine powder generated during tunnel blasting and small pieces of phosphate ore spilled into the tunnels during transportation flow into the underground water tank with the water, resulting in the presence of the aforementioned impurity phosphate ore in the sludge of the underground water tank. This type of impurity phosphate ore has a certain grade value and can be reused. Therefore, how to recover the impurity phosphate ore from the sludge of the underground water tank is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] In view of this, the purpose of this utility model is to address the shortcomings of the existing technology by proposing a sludge treatment system for underground phosphate mine water tanks. This system aims to solve the problem of recovering valuable phosphate ore from the sludge in underground phosphate mine water tanks, achieving the technical effects of recovering valuable resources, efficiently treating sludge, eliminating environmental pollution, and effectively managing mining voids.

[0008] To achieve the above objectives, this utility model provides a sludge treatment system for underground phosphate mine water sump, comprising a mine cleaning machine, a mine vibrating screen, and a mixing device. The mine cleaning machine is equipped with a digging and loading mechanism and a pumping mechanism. The digging and loading mechanism is used to clean the sludge and transport it to the pumping mechanism. The discharge port of the pumping mechanism is connected to a conveying pipe, and the discharge port of the conveying pipe is connected to the inlet of the mine vibrating screen. The mixing device is equipped with a first inlet, a second inlet, a water inlet, and a discharge port. The first inlet is connected to the mine vibrating screen. The fine material outlet is connected to the first inlet, the second inlet is connected to the cementitious material feeding device, the water inlet is connected to the water supply device, the outlet is connected to the discharge pipe, a centrifugal pump is installed on the discharge pipe, and the outlet end of the discharge pipe extends into the goaf; a vibrating screen box is installed above the feed hopper of the pumping mechanism, the vibrating screen box is hinged and fixed to the outside of the mining cleaning machine, a screen with a screen hole diameter of 30-40mm is installed inside the vibrating screen box, and the vibrating screen box is connected to the vibrating motor; the screen hole diameter of the mining vibrating screen is 10-20mm.

[0009] This invention uses a vibrating screen with a mesh size of 30-40mm at the feed inlet of the pumping mechanism. On the one hand, it can break up the hardened sludge blocks to facilitate transportation and subsequent screening and grading. On the other hand, it can also prevent large pieces of material from entering the subsequent conveying pipeline and pump chamber, causing problems such as pipeline wear, blockage and equipment damage. This invention incorporates a mining vibrating screen with a 10-20mm aperture after the pumping mechanism to screen and classify large and fine particles in the sludge. This enables the recovery and utilization of impurities such as phosphate rock in the sludge. These impurities are mostly fine powder generated during tunnel blasting and small lumps of phosphate rock spilled into the tunnel during transportation. The 10-20mm aperture screen is used for screening because only phosphate rock particles larger than this aperture have recovery value. The fine particles that pass through the screen are mixed with cementing materials to form a filling slurry, which can be directly pumped to the goaf for filling and treating the goaf. This avoids subsequent processes such as filtration, stockpiling, and transportation of the slurry, and also treats the goaf underground, effectively preventing roof collapse accidents.

[0010] Furthermore, the water inlet of the stirring device is connected to a water supply device via a water inlet pipe, and a water inlet valve is installed on the water inlet pipe. By controlling the opening of the water inlet valve, water is quantitatively delivered, and the concentration of the sludge slurry is controlled at 50-70%, avoiding the occurrence of slurry that is too viscous to pump, and ensuring that the filling slurry can be stably and continuously delivered to the underground empty area through the discharge pipe.

[0011] Furthermore, a conveying device is installed below the coarse material outlet of the mining vibrating screen. The conveying device can be a belt conveyor, a mining car, or other equipment. The coarse material (mainly large pieces of ore with good grade) screened out by the vibrating screen is transported to the site for storage and subsequent recycling.

[0012] Furthermore, the mining cleaning machine is equipped with a remote control transmitter and receiver device to realize the remote control function of the mining cleaning machine.

[0013] Furthermore, the cementitious material feeding device includes a cementitious material storage device and a metering screw conveyor. The outlet of the cementitious material storage device is connected to the metering screw conveyor, and the outlet of the metering screw conveyor is connected to the second inlet of the mixing device. By quantitatively inputting the cementitious material, the ratio of fine sludge particles to the cementitious material is controlled within a suitable range, ensuring that the cementitious properties of the filling slurry obtained by mixing the two meet the requirements for filling materials in goaf remediation.

[0014] Compared with existing technologies, this utility model provides a phosphate mine underground water sump sludge treatment system that realizes the recovery and utilization of phosphate ore impurities in the phosphate mine underground water sump sludge. It achieves beneficial effects such as valuable resource recovery, reduced equipment wear, and optimized sludge mixing and transportation. Through slurry filling, it eliminates the need for filter press equipment and transportation, is environmentally friendly and low-cost, and can also treat empty areas and recover ore, resulting in good economic and environmental benefits. The sludge treatment system provided by this utility model has a simple structure, small overall footprint, low equipment investment, low construction cost, and safe operation. It is applicable to all mine water sump sludge containing a certain grade of value obtained through the filling mining method. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the sludge treatment system for underground water storage in phosphate mines according to the present invention.

[0016] Legend:

[0017] 1-Mining cleaning machine; 11-Excavating and loading mechanism; 12-Pumping mechanism; 13-Screen; 14-Vibrating motor; 15-Remote control transmitter and receiver; 16-Vibrating screen box;

[0018] 2-Mining vibrating screen; 21-Fine material discharge port; 22-Coarse material discharge port;

[0019] 3-Agitator; 31-First feed inlet; 32-Second feed inlet; 33-Water inlet; 34-Discharge outlet;

[0020] 4-Storage device for cementitious materials; 5-Conveying pipeline; 6-Discharging pipeline; 61-Centrifugal pump; 7-Belt conveyor; 8-Quantitative screw conveyor; 9-Water inlet pipeline; 91-Water inlet valve. Detailed Implementation

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order; the terms "inner" and "outer" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0022] See Figure 1 This utility model provides a sludge treatment system for underground water tanks in phosphate mines. It includes a mine cleaning machine 1, a mine vibrating screen 2, and a stirring device 3. The mine cleaning machine 1 is equipped with a digging and loading mechanism 11 and a pumping mechanism 12. The digging and loading mechanism 11 is used to clean the sludge and transport it to the pumping mechanism 12. The discharge port of the pumping mechanism 12 is connected to a conveying pipe 5, and the discharge port of the conveying pipe 5 is connected to the inlet of the mine vibrating screen 2. The mixing device 3 is equipped with a first feed inlet 31, a second feed inlet 32, a water inlet 33, and a discharge outlet 34. The fine material discharge outlet 21 of the mining vibrating screen 2 is connected to the first feed inlet 31 of the mixing device 3. The second feed inlet 32 ​​of the mixing device 3 is connected to a cementitious material feeding device. The water inlet 33 of the mixing device 3 is connected to a water supply device. The discharge outlet 34 of the mixing device 3 is connected to a discharge pipe 6. A centrifugal pump 61 is installed on the discharge pipe 6. The outlet end of the discharge pipe 6 extends into the goaf so that the mixed slurry in the mixing device 3 can be directly transported to the goaf for use as goaf filling material. The screen mesh of the mining vibrating screen 2 has an aperture of 10-20mm. In this embodiment, the mining vibrating screen 2 is preferably a circular vibrating screen.

[0023] It is understood that in this utility model, the function of the stirring device 3 is to stir and mix the materials entering the device. It is equipped with stirring components (such as stirring shaft) to achieve stirring. In this embodiment, the stirring device 3 is preferably a mining stirring tank or a mining stirring vessel.

[0024] In this embodiment, the structure of the mine cleaning machine 1 can refer to the mine cleaning machine structure disclosed in patent CN119754365A. This utility model sets a vibrating screen with a screen aperture of 30-40mm at the feed inlet of the pumping mechanism 12 of the mine cleaning machine to break up and initially classify the sludge clumps in the underground water tank of phosphate mines. For details, see [link to relevant documentation]. Figure 1 In this embodiment, the vibrating screen box 16 is hinged and fixed on the outer steel frame of the mining cleaning machine 1. The vibrating screen box 16 is set above the feed hopper of the pumping mechanism 12. The screen 13 is fixed inside the vibrating screen box 16 by means of pressure strips, bolts, etc. The vibrating motor 14 is connected to the vibrating screen box 16 by means of bolt connection, flange connection, base plate transition connection, etc. In this way, the vibrating motor 14 can drive the vibrating screen box 16 to vibrate, thereby realizing the dispersal and screening of sludge.

[0025] In this embodiment, the water inlet 33 of the stirring device 3 is connected to the water supply device through the water inlet pipe 9. The water inlet pipe 9 is equipped with a water inlet valve 91. By controlling the opening of the water inlet valve 91, the water is quantitatively transported, and the sludge slurry concentration is controlled at 50-70%. This avoids the situation where the slurry is too viscous to be pumped, and ensures that the filling slurry can be stably and continuously transported to the underground empty area through the discharge pipe.

[0026] In this embodiment, a conveying device is provided below the coarse material outlet 22 of the mining vibrating screen 2. The conveying device is a belt conveyor 7. The coarse material (mainly large pieces of ore with good grade) screened out by the vibrating screen is transported to the site for storage and subsequent recycling.

[0027] In this embodiment, the mining cleaning machine 1 is equipped with a remote control transmitter and receiver 15. The various functions of the mining cleaning machine can be remotely controlled through the remote control transmitter and receiver 15, avoiding the need for staff to enter the machine to operate it, and improving the safety and convenience of the staff's work.

[0028] In this embodiment, the cementitious material feeding device includes a cementitious material storage device 4 and a quantitative screw conveyor 8. The outlet of the cementitious material storage device 4 is connected to the inlet of the quantitative screw conveyor 8, and the outlet of the quantitative screw conveyor 8 is connected to the second inlet 32 ​​of the mixing device 3. The quantitative screw conveyor 8 achieves quantitative delivery of the cementitious material, ensuring that the cementitious properties of the slurry in the mixing device 3 meet the design requirements. The cementitious material includes inorganic cementitious materials such as cement, lime, and gypsum. In this embodiment, cement is preferred as the cementitious material, and a cement silo is preferred as the cementitious material storage device.

[0029] The workflow of the phosphate mine underground water sump sludge treatment system provided in this embodiment is as follows:

[0030] The mining cleaning machine 1 enters the water tank and the sludge is transported to the screen 13 of the vibrating screen box 16 by the excavation and loading mechanism 11. After being dispersed and screened by the vibrating screen box 16, it enters the pumping mechanism 12. The pumping mechanism 12 sends the sludge to the mining vibrating screen 2 through the conveying pipe 5 for secondary screening to classify the coarse and fine particles in the sludge. The coarse particles screened out (mainly large pieces of ore with good grade) can be directly piled up next to it, or they can be transported to a designated location for storage by a conveying device (such as belt conveyor 7). They can then be transported out by a loader for recycling. The undersize material (sludge slurry, fine particles, etc.) enters the mixing device 3 and is mixed evenly with a certain amount of cementing material and water to prepare filling slurry. The filling slurry is then pumped out by the centrifugal pump 61 and directly transported to the underground empty area.

[0031] In summary, the sludge treatment system for underground phosphate mine water tanks provided by this utility model realizes the recovery and utilization of valuable phosphate ore in the sludge of underground phosphate mine water tanks. It achieves the beneficial effects of recovering valuable resources, reducing equipment wear, and optimizing sludge mixing and transportation. By making slurry and filling, it eliminates the need for filter press equipment and transportation, does not pollute the environment and has low cost. Moreover, it can treat empty areas and recover ore, and has good economic and environmental benefits.

[0032] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A sludge treatment system for underground water storage in phosphate mines, characterized in that: The system includes a mining sludge cleaning machine, a mining vibrating screen, and a mixing device. The mining sludge cleaning machine is equipped with a digging and loading mechanism and a pumping mechanism. The digging and loading mechanism is used to clean up sludge and transfer it to the pumping mechanism. The discharge port of the pumping mechanism is connected to a conveying pipe, and the discharge port of the conveying pipe is connected to the inlet of the mining vibrating screen. The mixing device is provided with a first feed inlet, a second feed inlet, a water inlet, and a discharge outlet. The first feed inlet is connected to the fine material discharge outlet of the mining vibrating screen. The second feed inlet is connected to a cementitious material feeding device. The water inlet is connected to a water supply device. The discharge outlet is connected to a discharge pipe. A centrifugal pump is installed on the discharge pipe. The outlet end of the discharge pipe extends into the goaf. A vibrating screen box is installed above the feed hopper of the pumping mechanism. The vibrating screen box is hinged and fixed to the outside of the mining cleaning machine. The vibrating screen box is equipped with a screen mesh with a screen hole diameter of 30-40mm. The vibrating screen box is connected to a vibrating motor. The screen mesh diameter of the mining vibrating screen is 10-20mm.

2. The sludge treatment system for underground water storage in a phosphate mine according to claim 1, characterized in that: The water inlet of the stirring device is connected to the water supply device through a water inlet pipe, and a water inlet valve is installed on the water inlet pipe.

3. The sludge treatment system for underground water storage in a phosphate mine according to claim 1, characterized in that: A conveying device is installed below the coarse material outlet of the mining vibrating screen.

4. The sludge treatment system for underground water storage in a phosphate mine according to claim 1, characterized in that: The mining cleaning machine is equipped with a remote control transmitter and receiver device.

5. A phosphate mine underground water sump sludge treatment system according to claim 1, characterized in that: The cementitious material feeding device includes a cementitious material storage device and a metering screw conveyor. The outlet of the cementitious material storage device is connected to the metering screw conveyor, and the outlet of the metering screw conveyor is connected to the second inlet of the mixing device.

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