Coal automatic float-and-sink test device using magnetic medium

Abstract

The application provides a coal automatic float-and-sink test device using magnetic medium, which comprises a slime cleaning device, a carrying device, an automatic float-and-sink device, a floating product fishing device, a product washing device, a medium recovery device and a control device, the carrying device comprises a grid barrel and a carrying assembly, the automatic float-and-sink device comprises a float-and-sink barrel, a medium storage barrel, a water storage barrel, a medium conveying pipeline and a clean water conveying pipeline, a medium valve is arranged on the medium conveying pipeline, and a clean water valve is arranged on the clean water conveying pipeline; the control device is connected with the carrying device, the medium valve and the clean water valve respectively and is used for controlling the carrying device, the medium valve and the clean water valve to work. Through reasonable arrangement and regulation and control of the control device, the coal float-and-sink test can be automatically carried out, human errors in the experiment process are reduced, the labor cost and the time cost are greatly saved, and the test efficiency and the test precision are improved.

Description

Technical Field

[0001] This invention belongs to the field of coal testing technology, specifically relating to an automatic coal floating and sinking test device using magnetic media. Background Technology

[0002] The coal float-sink test is a fundamental test used to understand the density composition of coal and the performance of related equipment, and it is widely used in the field of coal testing and analysis. This test can provide data support for coal preparation plant production and is an essential means of technical inspection and coal quality inspection in coal preparation plants. Currently, float-sink tests in coal preparation plants typically use manual retrieval, requiring the transfer and retrieval of coal samples between multiple tanks containing highly corrosive zinc chloride, posing significant safety hazards. Furthermore, the test is time-consuming, labor-intensive, complex, and inefficient, and there is a problem with the recovery of chlorine during product washing. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic coal floating and sinking test device using magnetic media. Through reasonable layout and control device regulation, the coal floating and sinking test can be automated, reducing human error in the experimental process, greatly saving labor and time costs, and improving test efficiency and accuracy.

[0004] To address the aforementioned problems, this invention provides an automatic coal floating and sinking test device using magnetic media, characterized in that it includes a coal slime washing device, a transport device, an automatic floating and sinking device, a floating product retrieval device, a product rinsing device, a media recovery device, and a control device.

[0005] The coal slime cleaning device is used to clean the coal slime on the surface of the coal sample to be tested.

[0006] The transport device is used to transfer test coal samples. The transport device includes a grid bucket and a transport component. The transport component is connected to the grid bucket and is used to move the grid bucket.

[0007] The automatic flotation and sinking device is used to separate light products and heavy products in test coal samples. The automatic flotation and sinking device includes a flotation and sinking tank, a storage tank, a water storage tank, a medium conveying pipeline, and a clean water conveying pipeline. The storage tank is connected to the flotation and sinking tank through the medium conveying pipeline, and the water storage tank is connected to the flotation and sinking tank through the clean water conveying pipeline. A medium valve is installed on the medium conveying pipeline, and a clean water valve is installed on the clean water conveying pipeline.

[0008] The floating product retrieval device is used to retrieve the light products in the flotation tank, and the floating product retrieval device is connected to the transport device.

[0009] The product rinsing device is used to rinse the floating and sinking medium on the surface of the light products retrieved from the sinking and floating tank.

[0010] The media recovery device is used to recover the floating and sinking media washed down by the product rinsing device;

[0011] The control device is connected to the transport device, the medium valve, and the clean water valve, and is used to control the operation of the medium valve and the clean water valve of the transport device.

[0012] The above-mentioned automatic coal floating and sinking test device using magnetic media is characterized in that the coal slime washing device includes a coal slime washing tank, which is located below the transport device, and the coal slime washing tank, the floating and sinking tank and the product rinsing device are arranged in sequence.

[0013] The aforementioned automatic coal floating and sinking test device using magnetic media is characterized in that the automatic floating and sinking device further includes an electromagnetic stirrer, a high-level online density meter, a low-level online density meter, an online level gauge, and an infrared sensing panel. The electromagnetic stirrer is located on the outside of the floating and sinking tank and is used to drive the movement of the magnetic medium inside the tank through a magnetic field. The high-level online density meter is located in the upper part of the inner side of the tank, the low-level online density meter is located in the lower part of the inner side of the tank, the online level gauge is located inside the tank and is used to measure the level of the liquid inside the tank, and the infrared sensing panel is located inside the tank to detect whether there are still uncollected light products in the upper 1 / 3 position of the tank. The high-level online density meter, the low-level online density meter, and the infrared sensing panel are all connected to the control device and are used to transmit the detection information to the control device.

[0014] The above-mentioned automatic coal floating and sinking test device using magnetic media is characterized in that the transport component includes: a slide rail, a first pulley mechanism and a second pulley mechanism. The slide rail is located above the coal slime washing device, the automatic floating and sinking device and the product washing device. The first pulley mechanism is installed on the slide rail and can move along the slide rail. The first pulley mechanism is connected to the grid bucket through a traction rope. The second pulley mechanism is installed on the slide rail and can move along the slide rail. The second pulley mechanism is connected to the floating product retrieval device through a traction rope.

[0015] The above-mentioned automatic coal floating and sinking test device using magnetic media is characterized in that the floating product retrieval device includes: an inner hemispherical grid, an outer hemispherical grid, and a rotating shaft. The outer hemispherical grid is connected to the inner hemispherical grid through the rotating shaft, and the inner hemispherical grid can be completely placed inside the outer hemispherical grid under the drive of the rotating shaft. The outer hemispherical grid is connected to a second pulley mechanism through a traction rope.

[0016] The above-mentioned automatic coal floating and sinking test device using magnetic media is characterized in that the product rinsing device includes a rinsing nozzle, a rinsing water conveying pipe and a medium recovery tank. The rinsing nozzle is located below the slide rail and above the medium recovery tank. One end of the rinsing water conveying pipe is connected to a water storage tank, and the other end of the rinsing water conveying pipe is connected to the rinsing nozzle. A rinsing valve is provided on the rinsing water conveying pipe, and the control device is connected to the rinsing valve and is used to control the operation of the rinsing valve.

[0017] The above-mentioned automatic coal floating and sinking test device using magnetic media is characterized in that the media recovery device includes a magnetic separator, a conveyor belt, a media dryer, a bucket elevator, and a dilute medium pipe. The bottom of the media recovery tank is connected to the inlet of the magnetic separator through the dilute medium pipe. The outlet of the magnetic separator is connected to a water storage tank through a pipeline. The outlet of the magnetic separator is connected to the media dryer through the conveyor belt. The outlet of the media dryer is connected to the storage tank through the bucket elevator.

[0018] The above-mentioned automatic coal floating and sinking test device using magnetic media is characterized in that the automatic coal floating and sinking test device further includes a clean water pump, which is installed on a clean water conveying pipeline.

[0019] The above-mentioned automatic coal floating and sinking test device using magnetic media is characterized in that the automatic coal floating and sinking test device further includes a rapid product analyzer, which is located below the slide rail and connected to the control device.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. The stirring mechanism of the floating and sinking tank of the present invention is an electromagnetic stirrer, which can generate a strong force on the magnetic medium in a targeted manner, so that the magnetic medium suspension and coal are fully mixed. At the same time, the magnetic medium is in a slow disturbance state during the static stage, which can avoid the interference of strong disturbance on the test and the problem of uneven density caused by the sedimentation of the magnetic medium.

[0022] 2. This invention uses a media dryer to dry the recovered media before storage, which can avoid a series of problems caused by uneven water content after media recovery, leading to complicated heavy liquid preparation. It can also avoid the problem of water-containing media causing blockage of storage tanks and media conveying pipelines.

[0023] 3. This invention can automate the coal floating and sinking test, reduce human error in the experimental process, significantly save labor and time costs, and improve test efficiency and accuracy.

[0024] 4. Currently, all floating and sinking tests use zinc chloride solution as the heavy liquid. Zinc chloride is highly corrosive and difficult to recover. The automatic coal floating and sinking device of the present invention uses a suspension of magnetic medium instead of zinc chloride solution as the heavy liquid. The magnetic medium can be prepared separately according to needs, or it can be replaced by the magnetite heavy medium from the coal preparation plant, which is closer to the actual situation on site. At the same time, the magnetic medium can be recovered and reused through the medium recovery mechanism.

[0025] 5. This invention uses a magnetic medium suspension instead of zinc chloride solution as the heavy liquid, which has greater flexibility and its density can be adjusted in real time according to actual needs.

[0026] The invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1 An exemplary system architecture diagram of an embodiment of the present invention is shown;

[0029] Figure 2 A top view of the automatic floating and sinking mechanism in an embodiment of the present invention is shown.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10—Coal slime washing device; 11—Coal slime washing tank; 20—Transportation device;

[0032] 21—Grid bucket; 22—Transportation component; 22-1—Slide rail;

[0033] 22-2—First pulley mechanism; 22-3—Second pulley mechanism; 30—Automatic buoyancy device;

[0034] 31—Floating and sinking tank; 32—Storage tank; 33—Water storage tank;

[0035] 34—Media conveying pipeline; 35—Clean water conveying pipeline; 36—Media valve;

[0036] 37—Clear water valve; 38—Electromagnetic stirrer; 39—High-level online density meter;

[0037] 40—Low-level online density meter; 41—Online level meter; 42—Infrared sensing panel;

[0038] 43—Clear water pump; 50—Floating product retrieval device; 51—Inner hemispherical grid;

[0039] 52—Outer hemispherical mesh; 53—Rotating shaft; 60—Product rinsing device;

[0040] 61—Water spray nozzle; 62—Flush water delivery pipeline; 63—Media recovery tank;

[0041] 64—Flush valve; 70—Media recovery device; 71—Magnetic separator;

[0042] 72—Conveyor belt; 73—Media dryer; 74—Bucket elevator;

[0043] 75—Dilute medium tube; 80—Control device; 90—Product rapid analyzer. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0045] This embodiment discloses an automatic coal floating and sinking test device using magnetic media, which includes a coal slime washing device 10, a transport device 20, an automatic floating and sinking device 30, a floating product retrieval device 50, a product washing device 60, a media recovery device 70, and a control device 80. First, the coal slime washing device 10 cleans the surface of the coal sample to be tested. Then, the transport device 20 transports the cleaned coal sample to the automatic floating and sinking device 30 for separation of light and heavy products. Because the density of the light product is less than the density of the medium inside the automatic floating and sinking device 30, the light product floats at the top of the device. The floating product retrieval device 50 retrieves the light product from the top of the device and transports it to the product washing device 60. The product washing device 60 washes away the medium on the surface of the coal sample, and the washed medium is recovered and reused by the media recovery device 70. The entire process is controlled and regulated by the control device 80.

[0046] In this embodiment, the coal slime washing device 10 is used to clean the coal slime on the surface of the coal sample to be tested; the transport device 20 is used to transfer the test coal sample, and the transport device 20 includes a grid bucket 21 and a transport component 22. The transport component 22 is connected to the grid bucket 21 and is used to drive the grid bucket 21 to move; the automatic flotation and sinking device 30 is used to separate the light products and heavy products in the test coal sample. The automatic flotation and sinking device 30 includes a flotation and sinking bucket 31, a storage tank 32, a water storage tank 33, a medium conveying pipe 34, and a clean water conveying pipe 35. The storage tank 32 is connected to the flotation and sinking bucket 31 through the medium conveying pipe 34, and the water storage tank 33 is connected to the clean water conveying pipe 35. Pipeline 35 is connected to the flotation tank 31. A medium valve 36 is installed on the medium conveying pipeline 34, and a clear water valve 37 is installed on the clear water conveying pipeline 35. The floating product retrieval device 50 is used to retrieve light products from the flotation tank 31, and is connected to the transport device 20. The product rinsing device is used to rinse the floating and sinking medium on the surface of the light products retrieved from the flotation tank 31. The medium recovery device is used to recover the floating and sinking medium rinsed down by the product rinsing device 60. The control device 80 is connected to the transport device 20, the medium valve 36, and the clear water valve 37, and is used to control the operation of the medium valve 36 and the clear water valve 37 of the transport device 20. The control device 80 shown is a programmable logic controller (PLC) or an industrial control computer, which performs functions such as data acquisition, parameter setting, data analysis, and operation execution through a combination of software and hardware.

[0047] This invention, through reasonable layout and control device regulation, can realize the automation of coal floating and sinking tests, reduce human error in the experimental process, significantly save labor and time costs, and improve test efficiency and accuracy.

[0048] like Figure 1 As shown, the coal slime washing device includes a coal slime washing tank 11, which is located below the transport device, and the coal slime washing tank 11, the flotation tank 31 and the product rinsing device 60 are arranged in sequence.

[0049] like Figure 1 and Figure 2As shown, the automatic floating and sinking device 30 also includes an electromagnetic stirrer 38, a high-level online densitometer 39, a low-level online densitometer 40, an online level gauge 41, and an infrared sensing panel 42. The electromagnetic stirrer 38 is located on the outside of the floating and sinking tank 31 and is used to drive the movement of the magnetic medium inside the floating and sinking tank 31 through a magnetic field. The high-level online densitometer 39 is located on the upper part of the inner side of the floating and sinking tank 31, and the low-level online densitometer 40 is located on the lower part of the inner side of the floating and sinking tank 31. The online level gauge 41 is located inside the floating and sinking tank 31 and is used to measure the level of the liquid inside the floating and sinking tank 31. The infrared sensing panel 42 is located inside the floating and sinking tank 31 and is used to detect whether there are still uncollected light products at the upper 1 / 3 position of the floating and sinking tank 31. The high-level online densitometer 39, the low-level online densitometer 40, and the infrared sensing panel 42 are all connected to the control device 80 and are used to transmit the detection information to the control device 80.

[0050] In this embodiment, the stirring of the flotation tank 31 is carried out by an electromagnetic stirrer, which can generate a strong force on the magnetic medium in a targeted manner, so that the magnetic medium suspension and coal are fully mixed. At the same time, the magnetic medium is in a slow disturbance state during the static stage, which can avoid the interference of strong disturbance on the test and the problem of uneven density caused by the sedimentation of the magnetic medium.

[0051] like Figure 1 As shown, the transport component 22 includes a slide rail 22-1, a first pulley mechanism 22-2, and a second pulley mechanism 22-3. The slide rail 22-1 is located above the coal slime washing device 10, the automatic floating and sinking device 30, and the product washing device 50. The first pulley mechanism 22-2 is mounted on the slide rail 24 and can move along the slide rail 24. The first pulley mechanism 22-2 is connected to the grid bucket 21 via a traction rope. The second pulley mechanism 22-3 is mounted on the slide rail 24 and can move along the slide rail 24. The second pulley mechanism 22-3 is connected to the floating product retrieval device 50 via a traction rope. Both the first pulley mechanism 22-2 and the second pulley mechanism 22-3 are equipped with traction motors, which lift the grid bucket or the floating product retrieval device. Both the first pulley mechanism 22-2 and the second pulley mechanism 22-3 are also equipped with travel drive motors, which drive the first pulley mechanism 22-2 or the second pulley mechanism 22-3 to move along the slide rail 22-1.

[0052] like Figure 1 As shown, the floating product retrieval device 50 includes: an inner hemispherical mesh 51, an outer hemispherical mesh 52, and a rotating shaft 53. The outer hemispherical mesh 52 is connected to the inner hemispherical mesh 51 through the rotating shaft 53, and the inner hemispherical mesh 51 can be completely placed inside the outer hemispherical mesh 52 under the drive of the rotating shaft 53. The outer hemispherical mesh 52 is connected to the second pulley mechanism 22-3 through a traction rope.

[0053] like Figure 1 As shown, the product rinsing device 60 includes a water spray nozzle 61, a rinsing water delivery pipe 62, and a media recovery tank 63. The water spray nozzle 61 is located below the slide rail 22-1 and above the media recovery tank 63. One end of the rinsing water delivery pipe 62 is connected to the water storage tank 33, and the other end of the rinsing water delivery pipe 62 is connected to the water spray nozzle 61. A rinsing valve 64 is provided on the rinsing water delivery pipe 62. The control device 80 is connected to the rinsing valve 64 and is used to control the operation of the rinsing valve 64.

[0054] like Figure 1 As shown, the media recovery device 70 includes a magnetic separator 71, a conveyor belt 72, a media dryer 73, a bucket elevator 74, and a dilute medium pipe 75. The media recovery tank 63 is connected to the inlet of the magnetic separator 71 via the dilute medium pipe 75. The outlet of the magnetic separator 71 is connected to the water storage tank 33 via a pipeline. The outlet of the magnetic separator 71 is connected to the media dryer 73 via the conveyor belt 72. The outlet of the media dryer 73 is connected to the storage tank 32 via the bucket elevator 74.

[0055] The working principle of this embodiment is as follows: The control device 80 inputs the density parameters required for the buoyancy test, the density parameters of the magnetic medium and water medium, and the required liquid level parameters in the buoyancy tank 31. The control device 80 can calculate the required amounts of water medium and magnetic medium based on these parameters. The control device 80 controls the opening of the medium valve 36, which automatically closes after delivering the predetermined amount of medium. The clear water valve 37 opens, and the clear water pump 43 starts working. After delivering the predetermined amount of clear water, the clear water pump 43 closes, the clear water valve 37 closes, and the electromagnetic stirrer 38 starts, powerfully stirring the magnetic medium and water medium in the buoyancy tank 31 to ensure the magnetic medium is fully and evenly distributed in the water medium, forming a magnetic medium suspension. The high-level online density meter 39, the low-level online density meter 40, and the online liquid level meter 41 feed back the density and liquid level parameters to the control device 80. When the density parameters of the high-level online density meter 39 and the low-level online density meter 40 differ by 0.02 g / cm³, the system detects the difference between these parameters. 3 Inside, the control device 80 determines that the magnetic medium suspension is uniformly distributed, and the maximum error between the density parameters of the high-level online density meter 39 and the low-level online density meter 40 and the predetermined density does not exceed 0.02 g / cm³. 3When the magnetic medium suspension reaches the set density value, the control device 80 reduces the power of the electromagnetic stirrer 38 to maintain the suspension of the magnetic medium. Simultaneously, the coal sample to be floated / sinked is fed into the grid bucket 21 and placed in the coal slime washing bucket 1 to clean the coal slime. During the cleaning process, the grid bucket 21 moves up and down a short distance under the drive of the first pulley mechanism 22-2 and the traction motor. After the coal slime is cleaned, the grid bucket 21 is transferred to the float / sink bucket 31 under the combined action of the first pulley mechanism 22-2 and the traction motor. The grid bucket 21 then moves up and down a short distance under the drive of the first pulley mechanism 22-2 and the traction motor, ensuring that the coal to be floated / sinked is fully in contact with and evenly distributed in the magnetic medium suspension. The mixture is then left to stand for 10 minutes. After the light and heavy products are fully separated, the floating product retrieval device 50 moves downward under the combined action of the second pulley mechanism 22-3 and the traction motor until it is completely submerged in the magnetic medium suspension. The inner hemispherical mesh 51 moves outward from the outer hemispherical mesh 52 under the drive of the rotating shaft 53 until the inner and outer hemispherical meshes 51 are closed. Then, under the combined action of the second pulley mechanism 22-3 and the traction motor, it moves upward. After standing for 5 minutes to allow the magnetic medium suspension attached to the coal surface to fully detach, it moves to the left under the combined action of the second pulley mechanism 22-3 and the traction motor until it is below the flushing nozzle 61. The flushing valve 64 opens, and the clean water pump 43 starts. After 5 minutes, the floating product retrieval device... After the coal with attached magnetic medium is thoroughly rinsed, the clean water pump 43 and flushing valve 64 are closed. The floating product retrieval device 50 moves to the left above the product rapid analyzer 90 under the combined action of the second pulley mechanism 22-3 and the traction motor 8. The inner hemispherical grid 51 opens under the drive of the rotating shaft 53, placing the floating sample into the product rapid analyzer 90. The product rapid analyzer 90 can dry, weigh, and measure ash content of the sample online. Simultaneously, the infrared sensor panel 42 can detect whether there are still unretrieved floating products at the upper 1 / 3 position of the floating tank 31. If so, the floating product retrieval device 50 returns and continues retrieval until all are retrieved. The online level gauge 41, high-level online density meter 39, and low-level online density meter 4... After the density and liquid level parameters are fed back to the control device 80, the control device 80 can calculate the amount of magnetic medium and water medium required to be added for the next density level, and add the medium accordingly. This process is repeated until all density level products have been retrieved. Then, the grid bucket 21 moves upward under the drive of the first pulley mechanism 22-2 and the traction motor, and is left to stand for 10 minutes to allow the suspension to fully dissipate. After being rinsed under the water spray nozzle 61, it is transferred to the product rapid analyzer 90 for product property analysis. After all products have been analyzed, the product rapid analyzer 90 can send the analysis data to the technician's handheld terminal. At the same time, during the sorting process, the magnetic separator 71 is started to perform magnetic separation on the dilute medium in the medium recovery bucket 63.The drain outlet of the magnetic separator 71 is connected to the water storage tank 33 via a clean water recovery pipe, transporting the water medium separated by the magnetic separator 71 to the water storage tank 33. The conveyor belt 72 is connected to the magnetic medium discharge port of the magnetic separator 71, transporting the separated magnetic medium to the medium dryer 73 for drying. The bucket elevator 74 is connected to the medium dryer 73, transporting the dried medium back to the medium storage tank 32. After all density-grade products have been collected, the electromagnetic stirrer 38 is turned off, the medium recovery valve is opened, and the magnetic medium suspension in the flotation tank 31 enters the magnetic separator 71 through the medium recovery pipe for separation. As mentioned above, the recovered water medium enters the water storage tank, and the recovered magnetic medium enters the medium storage tank for reuse in the next test. The above description is only a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic coal buoyancy and sinking test device using magnetic media, characterized in that, include: Coal slime cleaning device (10), the coal slime cleaning device (10) is used to clean the coal slime on the surface of the coal sample to be tested; The transport device (20) is used to transfer test coal samples. The transport device (20) includes a grid bucket (21) and a transport component (22). The transport component (22) is connected to the grid bucket (21) and is used to drive the grid bucket (21) to move. An automatic flotation and sinking device (30) is used to separate light products and heavy products in a test coal sample. The automatic flotation and sinking device (30) includes a flotation and sinking tank (31), a storage tank (32), a water storage tank (33), a medium conveying pipeline (34), and a clean water conveying pipeline (35). The storage tank (32) is connected to the flotation and sinking tank (31) through the medium conveying pipeline (34). The water storage tank (33) is connected to the flotation and sinking tank (31) through the clean water conveying pipeline (35). A medium valve (36) is provided on the medium conveying pipeline (34), and a clean water valve (37) is provided on the clean water conveying pipeline (35). The automatic floating and sinking device (30) also includes an electromagnetic stirrer (38), a high-level online density meter (39), a low-level online density meter (40), an online level gauge (41), and an infrared sensing panel (42). The electromagnetic stirrer (38) is located on the outside of the floating and sinking tank (31), and the electromagnetic stirrer (38) is used to drive the movement of the magnetic medium inside the floating and sinking tank (31) through a magnetic field. A floating product retrieval device (50) is used to retrieve light products in the floating and sinking tank (31), and the floating product retrieval device (50) is connected to the transport device (20). The floating product retrieval device (50) includes: an inner hemispherical grid (51), an outer hemispherical grid (52), and a rotating shaft (53). The outer hemispherical grid (52) is connected to the inner hemispherical grid (51) through the rotating shaft (53), and the inner hemispherical grid (51) can be completely placed inside the outer hemispherical grid (52) under the drive of the rotating shaft (53). Product rinsing device (60), which is used to rinse the floating medium on the surface of the light products retrieved in the flotation tank (31); A media recovery device (70) is used to recover the floating and sinking media washed down by the product rinsing device (60); The control device (80) is connected to the transport device (20), the medium valve (36) and the clean water valve (37) respectively, and is used to control the operation of the medium valve (36) and the clean water valve (37) of the transport device (20).

2. The automatic coal floating and sinking test device using magnetic media according to claim 1, characterized in that, The coal slime washing device includes a coal slime washing tank (11), which is located below the transport device, and the coal slime washing tank (11), the flotation tank (31), and the product rinsing device (60) are arranged in sequence.

3. The automatic coal floating and sinking test device using magnetic media according to claim 1, characterized in that, The high-level online density meter (39) is located on the upper part of the inner side of the sinking tank (31), the low-level online density meter (40) is located on the lower part of the inner side of the sinking tank (31), the online liquid level meter (41) is located inside the sinking tank (31) and is used to measure the liquid level inside the sinking tank (31). The infrared sensing panel (42) is located inside the sinking tank (31) and is used to detect whether there are still uncollected light products at the upper 1 / 3 position of the sinking tank (31). The high-level online density meter (39), the low-level online density meter (40), and the infrared sensing panel (42) are all connected to the control device (80) and are used to transmit the detection information to the control device (80).

4. The automatic coal floating and sinking test device using magnetic media according to claim 1, characterized in that, The transport component (22) includes: a slide rail (22-1), a first pulley mechanism (22-2), and a second pulley mechanism (22-3). The slide rail (22-1) is located above the coal slime washing device (10), the automatic floating and sinking device (30), and the product washing device (60). The first pulley mechanism (22-2) is installed on the slide rail (22-1) and can move along the slide rail (22-1). The first pulley mechanism (22-2) is connected to the grid bucket (21) by a traction rope. The second pulley mechanism (22-3) is installed on the slide rail (22-1) and can move along the slide rail (22-1). The second pulley mechanism (22-3) is connected to the floating product retrieval device (50) by a traction rope.

5. The automatic coal floating and sinking test device using magnetic media according to claim 4, characterized in that, The outer hemispherical grid (52) is connected to the second pulley mechanism (22-3) by a traction rope.

6. The automatic coal floating and sinking test device using magnetic media according to claim 4, characterized in that, The product rinsing device (60) includes a rinsing nozzle (61), a rinsing water delivery pipe (62), and a media recovery tank (63). The rinsing nozzle (61) is located below the slide rail (22-1) and above the media recovery tank (63). One end of the rinsing water delivery pipe (62) is connected to the water storage tank (33), and the other end of the rinsing water delivery pipe (62) is connected to the rinsing nozzle (61). A rinsing valve (64) is provided on the rinsing water delivery pipe (62). The control device (80) is connected to the rinsing valve (64) and is used to control the operation of the rinsing valve (64).

7. The automatic coal floating and sinking test device using magnetic media according to claim 6, characterized in that, The media recovery device (70) includes a magnetic separator (71), a conveyor belt (72), a media dryer (73), a bucket elevator (74), and a dilute medium pipe (75). The media recovery tank (63) is connected to the inlet of the magnetic separator (71) via the dilute medium pipe (75). The outlet of the magnetic separator (71) is connected to the water storage tank (33) via a pipeline. The outlet of the magnetic separator (71) is connected to the media dryer (73) via the conveyor belt (72). The outlet of the media dryer (73) is connected to the storage tank (32) via the bucket elevator (74).

8. The automatic coal floating and sinking test device using magnetic media according to claim 6, characterized in that, The automatic coal floating and sinking test device also includes a clean water pump (43), which is installed on the clean water conveying pipeline (35).

9. The automatic coal floating and sinking test device using magnetic media according to claim 6, characterized in that, The automatic coal floating and sinking test device also includes a product rapid analyzer (90), which is located below the slide rail (22-1) and connected to the control device (80).

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