Self-circulation water replenishing device for tailing overflow of magnetic separator

Abstract

The utility model relates to the technical field of coal dressing, in particular to a magnetic separator tailing overflow self-circulation water replenishing device which comprises a magnetic separator, a feeding port of the magnetic separator is connected with a dilute medium barrel through a feeding pipe, a water pump is arranged on the feeding pipe, a water inlet of the dilute medium barrel is connected with a water replenishing pipeline, and an overflow pipe of the magnetic separator is located above an opening of the dilute medium barrel. An overflow pipe of the magnetic separator is connected with one end of a backflow pipeline, the other end of the backflow pipeline is located above the dilute medium barrel and close to an opening of the dilute medium barrel, and water overflowing from the overflow pipe of the magnetic separator flows into the dilute medium barrel through the backflow pipeline under the action of gravity. According to the utility model, water overflowing from the overflow pipeline of the magnetic separator can automatically flow to the dilute medium barrel to be used as replenished water, so that the circulation of water resources in the coal dressing system is realized, the use of external water is reduced, additional equipment is not needed, and unnecessary power consumption is effectively reduced, energy is saved and consumption is reduced while the production process is stabilized.

Description

Technical Field

[0001] This utility model relates to the field of coal preparation technology, specifically to a self-circulating water replenishment device for tailings overflow of a magnetic separator. Background Technology

[0002] The dilute medium tank is a key piece of equipment in the heavy media separation process of coal preparation plants. It is mainly used for storing, preparing, and recycling low-concentration media suspensions (i.e., "dilute media"). Its core function is to recover and treat the dilute media generated during the separation process through physical or chemical means, ensuring the stability and economy of the media system.

[0003] In heavy media coal preparation, high-density media (concentrated media) is used to separate coal from gangue. After separation, the media concentration decreases due to the mixing of impurities such as coal slime and moisture, forming "diluted media". The dilute media tank serves as a temporary storage container for the dilute media, providing a buffer for subsequent media purification (such as the recovery of magnetite powder by magnetic separator) and concentration adjustment.

[0004] A magnetic separator is an industrial device that separates materials based on differences in their magnetic properties. It is widely used in mineral processing, resource recycling, and environmental protection. Its core principle is to separate magnetic and non-magnetic materials by utilizing the difference in force exerted by a magnetic field. Figure 3 The general structure of an existing magnetic separator is shown, including a feed box 113, a feed pipe 114, an overflow baffle 115, an overflow pipe 116, a scraper 112, a tank structure, and a magnetic drum 111 disposed within the tank structure. The feed box 113 and the tank structure are connected by the feed pipe 114. The magnetic drum 111 rotates within the tank structure and has a certain distance between it and the bottom of the tank structure. During magnetic screening, the material first enters the feed box 113, and then enters the tank structure through the feed pipe 114. The rotating magnetic drum 111 adsorbs magnetic materials, and when it rotates to the scraper 112, it scrapes off the magnetic materials. The magnetic materials then accumulate at the bottom and are discharged. The remaining tailings slurry generated after separating the magnetic minerals enters a water tank and is discharged through the overflow pipe 116. The overflow mainly consists of water and contains a small amount of magnetic medium. The tailings are discharged through the tailings discharge pipe 117.

[0005] In heavy media separation processes, the connection between the dilute medium tank and the magnetic separator is a key design element for efficient system operation. Its essence lies in achieving media recycling, process parameter optimization, and resource conservation. The dilute medium tank stores a low-concentration media suspension (such as a mixture of magnetite powder and water), serving as the "raw material pool" for the magnetic separator. The core function of the magnetic separator is to efficiently recover magnetic particles from the dilute medium (recovery rate can reach over 99.5%), and the purified medium is returned to the system for recycling.

[0006] Throughout the coal preparation process, the dilute medium tank used requires water replenishment. This is because heavy medium coal preparation separates coal and gangue by density separation through magnetite powder and medium suspension. The dilute medium tank needs water replenishment to readjust the low-concentration medium (containing coal slime and water) after separation to a qualified density. At the same time, during the medium circulation process, water is naturally lost due to equipment heat dissipation, pipeline leakage, etc., and the liquid level is difficult to meet the process requirements of the liquid level in the dilute medium tank. It needs to be replenished regularly to maintain a stable liquid level.

[0007] Currently, most coal preparation plants source their makeup water for the dilute medium tanks primarily from thickener overflow, filtrate, and well water. Using these methods requires pre-treatment of the water source and the use of pumps and other power equipment to transport the water to the dilute medium tank. This pumping process not only increases electricity consumption but also leads to increased water resource loss. Utility Model Content

[0008] To address the technical problems of increased energy consumption in existing dilute medium tank water replenishment methods, this utility model provides a magnetic separator tailings overflow self-circulating water replenishment device, which can allow the water overflowing from the magnetic separator overflow pipe to flow by gravity to the dilute medium tank for water replenishment without the need for additional equipment, while reducing the use of external water and saving energy.

[0009] The technical solution adopted in this utility model is as follows:

[0010] A self-circulating water replenishment device for tailings overflow of a magnetic separator includes a magnetic separator. The feed inlet of the magnetic separator is connected to a dilute medium tank via a feed pipe. A water pump is installed on the feed pipe. A water replenishment pipe is connected to the water inlet of the dilute medium tank. The overflow pipe of the magnetic separator is located above the opening of the dilute medium tank. One end of the overflow pipe of the magnetic separator is connected to a return pipe. The other end of the return pipe is located above the dilute medium tank and close to the opening of the dilute medium tank. The water overflowing from the overflow pipe of the magnetic separator flows into the dilute medium tank through the return pipe under the action of gravity.

[0011] Furthermore, the return pipe includes a horizontal section connected to the overflow pipe and a vertical section connected to the horizontal section, with the lower opening of the vertical section of the return pipe located directly above the opening of the dilute medium tank.

[0012] Furthermore, a horizontal platform is fixed to the inner wall of the dilute medium tank. A vertical guide rod is fixed to the upper surface of the platform. A float that can slide up and down is sleeved on the guide rod. A telescopic cylinder is fixed to the upper surface of the float, which is fitted onto the guide rod and can slide up and down. A sealing head is fixed to the upper surface of the telescopic cylinder. The sealing head is located directly below the lower opening of the vertical section of the return pipe. After the float rises, the sealing head can seal the lower opening of the return pipe. The function is that the float provides upward buoyancy. When the liquid level in the dilute medium tank reaches the process requirements, the float rises, and then the sealing head moves upward to seal the return pipe, automatically ending the water replenishment without manual control.

[0013] Furthermore, the float can be made of wood, sponge, foam, or a plastic box with a closed cavity.

[0014] Furthermore, the telescopic cylinder includes a sleeve with internal threads, the lower end face of which is bonded and fixed to the upper end face of the float. The sleeve is provided with a threaded screw, and the sealing head is bonded and fixed to the upper end face of the screw. Its function is to adjust the length of the telescopic cylinder by rotating the screw, which facilitates changing the rising distance of the float and thus achieving sealing of the pipe opening at different liquid levels.

[0015] Furthermore, the plugging head is conical, and the lower opening of the vertical section of the return pipe has a plugging port that mates with the plugging head. This design helps to increase the plugging area and improve the plugging effect.

[0016] Furthermore, the vertical section of the return pipe is equipped with a T-shaped drain pipe, with the connection between the return pipe and the drain pipe located near the lower opening of the vertical section of the return pipe. This allows overflowing water to be diverted to the coal slurry water system through the drain pipe when the lower end of the return pipe is blocked.

[0017] Furthermore, both the sealing port and the sealing head are made of rubber. This allows the sealing head to flexibly fit the sealing port, and the rubber material improves the sealing performance.

[0018] The beneficial effects of this utility model are as follows:

[0019] (1) This utility model realizes the circulation of water resources within the coal preparation system, reduces the use of external water, conforms to the concept of energy conservation, emission reduction and green production, and reduces the water cost of coal preparation plants.

[0020] (2) The small amount of magnetic medium contained in the overflow water of the magnetic separator of this utility model can continue to participate in the medium circulation in the coal preparation process after returning to the dilute medium tank, which will not cause waste of resources.

[0021] (3) The overflow water of the magnetic separator of this utility model is returned to the dilute medium tank, which can accurately maintain the stability of the liquid level in the dilute medium tank. While stabilizing the production process, it effectively reduces unnecessary power consumption and provides a strong guarantee for the efficient and energy-saving operation of the coal preparation plant. Attached Figure Description

[0022] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model.

[0024] Figure 2 This is a partial structural diagram of Embodiment 2 of the present invention.

[0025] Figure 3 This is a schematic diagram of the magnetic separator structure in the background technology of this utility model.

[0026] In the diagram, 1-water supply pipe, 2-dilute medium tank, 3-discharge pipe, 4-magnetic separator, 5-return pipe, 6-drainage pipe, 7-feed pipe, 8-water pump, 9-sealing port, 10-platform, 11-screw, 12-sealing head, 13-sleeve, 14-guide rod, 15-float; 111-magnetic drum, 112-scraper, 113-feed box, 114-feed pipe, 115-overflow baffle, 116-overflow pipe, 117-tailings discharge pipe. Detailed Implementation

[0027] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0028] Example 1

[0029] Combination Figure 1 This utility model provides a self-circulating water replenishment device for tailings overflow of a magnetic separator, including a magnetic separator 4. The feed inlet of the magnetic separator 4 is connected to a dilute medium tank 2 through a feed pipe 7. A water pump 8 is provided on the feed pipe 7. A water replenishment pipe 1 is connected to the water inlet of the dilute medium tank 2. The overflow pipe of the magnetic separator 4 is located above the opening of the dilute medium tank 2. One end of the overflow pipe of the magnetic separator 4 is connected to a return pipe 5. The other end of the return pipe 5 is located above the dilute medium tank 2 and close to the opening of the dilute medium tank 2.

[0030] The water overflowing from the overflow pipe of the magnetic separator 4 in this invention flows by gravity through the return pipe 5 into the dilute medium tank 2, serving as replenishment water for the tank. This eliminates the need for additional equipment and reduces the use of external water, thus saving energy and reducing consumption. Furthermore, the small amount of magnetic medium contained in the overflow water of the magnetic separator 4 can continue to participate in the medium circulation during the coal preparation process after returning to the dilute medium tank 2, preventing resource waste. This invention allows the overflow water from the magnetic separator to be returned to the dilute medium tank 2, precisely maintaining a stable liquid level. This stabilizes the production process while effectively reducing unnecessary power consumption, providing a strong guarantee for the efficient and energy-saving operation of the coal preparation plant.

[0031] Example 2

[0032] Combination Figure 2 The difference between Example 2 and Example 1 is that:

[0033] In Example 2, the return pipe 5 includes a horizontal section connected to the overflow pipe and a vertical section connected to the horizontal section. The lower opening of the vertical section of the return pipe 5 is located directly above the opening of the dilute medium tank 2. A horizontal platform 10 is fixed on the inner wall of the dilute medium tank 2. A vertical guide rod 14 is fixed on the upper surface of the platform 10. A float 15 that can slide up and down is sleeved on the guide rod 14. The float 15 is a foam block. A telescopic cylinder is fixed on the upper surface of the float 15. The telescopic cylinder is sleeved on the guide rod 14 and can slide up and down. The telescopic cylinder includes a sleeve 13 with internal threads. The lower surface of the sleeve 13 is bonded and fixed to the upper surface of the float 15. The sleeve 13 is provided with a threaded screw 11. A sealing head 12 is bonded and fixed to the upper surface of the screw 11. After the float 15 rises, the sealing head 12 can seal the lower opening of the return pipe 5.

[0034] In order to increase the sealing area and improve the sealing effect of the sealing head 12, the sealing head 12 of this utility model is conical, and the lower end of the vertical section of the return pipe 5 is provided with a sealing port 9 that cooperates with the sealing head 12. The two work closely together to achieve the sealing of the pipe opening.

[0035] In order to drain the overflowing water when the pipe is blocked, this utility model has a T-shaped drain pipe 6 in the vertical section of the return pipe 5. The connection between the return pipe 5 and the drain pipe 6 is close to the lower opening of the vertical section of the return pipe 5. When the lower port of the return pipe 5 is blocked, the overflowing water can be drained to the coal slurry water system through the drain pipe 6.

[0036] In order to make the sealing head 12 flexibly fit the sealing opening 9 and improve the sealing performance, both the sealing opening 9 and the sealing head 12 of this utility model are made of rubber.

[0037] The working process of Example 2 is as follows: In the heavy medium coal preparation operation, the low-concentration medium suspension enters the dilute medium tank 2. The water replenishment pipe 1 has a valve, which is used to replenish water in the dilute medium tank 2 in the initial stage. After the magnetic separation is started, water can be replenished by closing the valve and using overflow water, or by opening the valve to replenish water source when the overflow water flow is insufficient. The dilute medium is pumped to the magnetic separator 4 by the water pump 8 for magnetic separation. After magnetic separation, the qualified medium is discharged through the discharge pipe 3. The overflow water of the magnetic separator 4 enters the return pipe 5 and is discharged into the dilute medium tank 2 through the lower end pipe. The fine adjustment screw 11 shortens the distance between the sealing head 12 and the sealing port 9, and then the height of the float 15 rising with the liquid level can be adjusted. When the liquid level in the tank rises, the liquid surface contacts the float 15, and the float 15 provides upward buoyancy. When the replenished liquid level in the dilute medium tank 2 reaches the process requirements, the float 15 rises, and then the sealing head 12 moves upward to seal the return pipe 5, automatically ending the water replenishment without manual control. During the sealing period, the overflow water was diverted to the coal slurry water system through drainage pipe 6.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-circulating water replenishment device for tailings overflow of a magnetic separator, comprising a magnetic separator, wherein the feed inlet of the magnetic separator is connected to a dilute medium tank via a feed pipe, a water pump is installed on the feed pipe, and a water replenishment pipe is connected to the water inlet of the dilute medium tank, characterized in that, The overflow pipe of the magnetic separator is located above the opening of the dilute medium tank. One end of the overflow pipe of the magnetic separator is connected to the return pipe. The other end of the return pipe is located above the dilute medium tank and close to the opening of the dilute medium tank. The water overflowing from the overflow pipe of the magnetic separator flows into the dilute medium tank through the return pipe under the action of gravity.

2. The magnetic separator tailings overflow self-circulation water replenishment device according to claim 1, characterized in that, The return pipe includes a horizontal section connected to the overflow pipe and a vertical section connected to the horizontal section. The lower opening of the vertical section of the return pipe is located directly above the opening of the dilute medium tank.

3. The magnetic separator tailings overflow self-circulation water replenishment device according to claim 2, characterized in that, A horizontal platform is fixed on the inner wall of the dilute medium tank. A vertical guide rod is fixed on the upper surface of the platform. A float that can slide up and down is sleeved on the guide rod. A telescopic cylinder is fixed on the upper surface of the float. The telescopic cylinder is sleeved on the guide rod and can slide up and down. A sealing head is fixed on the upper surface of the telescopic cylinder. The sealing head is located directly below the lower opening of the vertical section of the return pipe. After the float rises, the sealing head can seal the lower opening of the return pipe.

4. The magnetic separator tailings overflow self-circulation water replenishment device according to claim 3, characterized in that, The float can be made of wood, sponge, foam or a plastic box with a closed cavity.

5. The magnetic separator tailings overflow self-circulation water replenishment device according to claim 3, characterized in that, The telescopic cylinder includes a sleeve with internal threads, the lower end face of the sleeve is bonded and fixed to the upper end face of the float, the sleeve is provided with a threaded screw, and the sealing head is bonded and fixed to the upper end face of the screw.

6. The magnetic separator tailings overflow self-circulation water replenishment device according to claim 3, characterized in that, The plug head is conical, and the lower end of the vertical section of the return pipe is provided with a plugging port that matches the plug head.

7. The magnetic separator tailings overflow self-circulation water replenishment device according to claim 3, characterized in that, The vertical section of the return pipe is equipped with a T-shaped drain pipe, and the connection between the return pipe and the drain pipe is near the lower opening of the vertical section of the return pipe.

8. The magnetic separator tailings overflow self-circulation water replenishment device according to claim 6, characterized in that, Both the sealing port and the sealing head are made of rubber.

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