Magnetic separation device for calcium carbonate digestion slurry

Abstract

The utility model discloses a calcium carbonate digestion slurry magnetic separation device which comprises a magnetic separator shell, an upper connecting pipe communicated with a flow channel is arranged above an upper magnet yoke, the upper connecting pipe is respectively connected with a refined slurry pipe and a washing pipe, a servo motor is installed on the top of a lower connecting pipe, and an output shaft of the servo motor is connected with a rotating shaft. And the rotating shaft penetrates through the upper connecting pipe and the upper magnet yoke and is connected with a centrifugal rotating drum arranged in the magnetic separation pipeline. On the basis of magnetic force, centrifugal force is applied to magnetic particle impurities through the centrifugal rotating drum, the magnetic particle impurities move to the periphery to be close to the inner wall of the magnetic separation pipeline, the magnetic particle impurities are more easily adsorbed by a magnetic field generated by the excitation coil for impurity removal, and therefore the magnetic separation efficiency is improved; the technology is mature and stable, and the energy consumption and heat are relatively low, so that the overall energy consumption rise is small when the magnetic separation efficiency of the electromagnetic slurry magnetic separator is improved, and the purpose of low-energy-consumption and high-efficiency magnetic separation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic separators, in particular to a calcium carbonate digestion slurry magnetic separation device. Background Art

[0002] During the production and processing of nano-calcium carbonate, lime is converted into a slurry, which undergoes multiple processing steps. Before entering the digestion process, the lime blocks are initially screened to remove impurities. After the digestion reaction is complete, a vibrating screen is used to screen out unreacted lime blocks and impurities. To ensure the production quality of nano-calcium carbonate, the digested slurry is magnetically separated to remove magnetic impurities. This ensures that the carbonized nano-calcium carbonate particles achieve the desired morphology, particle size, purity, and color.

[0003] In the prior art, the magnetic separation of calcium carbonate digestion slurry is carried out by electromagnetic slurry magnetic separator. The digestion slurry flows from bottom to top under the action of the conveying pump. The magnetic field generated by the energized excitation coil adsorbs magnetic particle impurities for impurity removal. The magnetic particle impurity removal relies solely on the magnetic force of the magnetic field. When the speed is increased and the flow rate of the conveying pump is increased, the impurity removal effect will decrease. It is necessary to increase the current of the excitation coil to ensure sufficient magnetic separation magnetic field. This will lead to an increase in the energy consumption of the excitation coil and the increase in the heat of the equipment, which will increase the energy consumption of the cooling component, resulting in a significant increase in the overall energy consumption, which is insufficient. Therefore, a low-energy consumption calcium carbonate digestion slurry magnetic separation device is designed and proposed. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides a calcium carbonate digestion slurry magnetic separation device for achieving the purpose of low energy consumption and high efficiency magnetic separation.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A calcium carbonate digestion slurry magnetic separation device comprises a magnetic separator housing, a magnetic separation pipe vertically mounted inside the magnetic separator housing, an excitation coil mounted on the surface of the magnetic separation pipe, an upper magnetic yoke and a lower magnetic yoke mounted on the top and bottom of the magnetic separator housing, corresponding to the positions of the excitation coils, respectively, flow channels being disposed on the upper and lower magnetic yokes at positions corresponding to the magnetic separation pipes, a lower connecting pipe connected to the flow channel being disposed below the lower magnetic yoke, and a raw material pipe and a waste pipe being connected to the lower connecting pipe, respectively;

[0007] An upper connecting tube connected to the flow channel is provided above the upper magnetic yoke, and the upper connecting tube is respectively connected to the fine slurry tube and the flushing tube. A servo motor is installed on the top of the lower connecting tube, and the output shaft of the servo motor is connected to the rotating shaft. The rotating shaft passes through the upper connecting tube and the upper magnetic yoke and is connected to the centrifugal drum arranged inside the magnetic separation pipeline.

[0008] Preferably, the flow channels on the upper magnetic yoke and the lower magnetic yoke are evenly arranged in the area corresponding to the magnetic separation pipeline.

[0009] Preferably, a guide opening is provided on the upper surface of the lower magnetic yoke at a position corresponding to the flow channel.

[0010] Preferably, a tapered tube with a larger upper portion and a smaller lower portion is provided between the lower magnetic yoke and the lower connecting tube.

[0011] Preferably, the raw material pipe, waste pipe, refined pulp pipe and flushing pipe are respectively equipped with a raw material valve, a waste valve, a refined pulp valve and a flushing valve.

[0012] Preferably, shaft seats rotatably connected to the rotating shaft are installed on the opposing surfaces of the upper magnetic yoke and the lower magnetic yoke.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The utility model drives the centrifugal drum in the magnetic separation pipeline to rotate through a servo motor, and exerts centrifugal force on the magnetic particle impurities through the centrifugal drum on the basis of magnetic force, so that they move around close to the inner wall of the magnetic separation pipeline, making it easier for them to be adsorbed and removed by the magnetic field generated by the excitation coil, thereby improving the magnetic separation efficiency. At the same time, since the servo motor is a type of motor, the motor is a special rotation drive device with mature and stable technology, and relatively low energy consumption and heat. As a result, the overall energy consumption of the electromagnetic slurry magnetic separator increases less when the magnetic separation efficiency is improved, thereby achieving the purpose of low energy consumption and high efficiency magnetic separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure at the corresponding position of the lower magnetic yoke of the present invention;

[0017] Figure 3 This is a top cross-sectional view of the centrifugal drum of the present invention.

[0018] In the figure: 1. Magnetic separator housing; 2. Magnetic separation pipeline; 3. Excitation coil; 4. Upper magnetic yoke; 5. Lower magnetic yoke; 6. Flow channel; 7. Lower connecting pipe; 8. Raw material pipe; 9. Waste pipe; 10. Upper connecting pipe; 11. Slurry pipe; 12. Flushing pipe; 13. Servo motor; 14. Rotating shaft; 15. Centrifugal drum; 16. Guide port; 17. Conical pipe; 18. Raw material valve; 19. Waste valve; 20. Slurry valve; 21. Flushing valve; 22. Shaft seat. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figure 1-3 As shown, the utility model provides a technical solution: a calcium carbonate digestion slurry magnetic separation device, comprising a magnetic separator housing 1, a magnetic separation pipe 2 vertically installed inside the magnetic separator housing 1, an excitation coil 3 arranged on the surface of the magnetic separation pipe 2 installed inside the magnetic separator housing 1, an upper magnetic yoke 4 and a lower magnetic yoke 5 corresponding to the position of the excitation coil 3 are respectively installed on the top and bottom of the magnetic separator housing 1, and a flow channel 6 is provided on the upper magnetic yoke 4 and the lower magnetic yoke 5 at the position corresponding to the magnetic separation pipe 2;

[0021] The flow channels 6 on the upper magnetic yoke 4 and the lower magnetic yoke 5 are evenly arranged in the area corresponding to the magnetic separation pipe 2. A guide port 16 is provided on the upper surface of the lower magnetic yoke 5 at a position corresponding to the flow channel 6. A lower connecting pipe 7 connected to the flow channel 6 is provided below the lower magnetic yoke 5. A tapered pipe 17 with a larger upper portion and a smaller lower portion is provided between the lower magnetic yoke 5 and the lower connecting pipe 7. The lower connecting pipe 7 is respectively connected to the raw material pipe 8 and the waste pipe 9;

[0022] An upper connecting pipe 10 is provided above the upper magnetic yoke 4 and is connected to the flow channel 6. The upper connecting pipe 10 is connected to a refined pulp pipe 11 and a flushing pipe 12 respectively. A raw material valve 18, a waste valve 19, a refined pulp valve 20 and a flushing valve 21 are installed on the raw material pipe 8, the waste pipe 9, the refined pulp pipe 11 and the flushing pipe 12 respectively.

[0023] A servo motor 13 is installed on the top of the lower connecting tube 7. The output shaft of the servo motor 13 is connected to the rotating shaft 14. The rotating shaft 14 passes through the upper connecting tube 10 and the upper magnetic yoke 4 and is connected to the centrifugal drum 15 arranged inside the magnetic separation pipe 2. The opposite surfaces of the upper magnetic yoke 4 and the lower magnetic yoke 5 are both equipped with shaft seats 22 that are rotatably connected to the rotating shaft 14.

[0024] Working principle:

[0025] Close the waste valve 19 and the flushing valve 21, open the raw material valve 18 and the refined slurry valve 20, and the calcium carbonate digestion slurry passes through the delivery pump, the raw material pipe 8, and the lower connecting pipe 7, and is gradually dispersed in the flow channel 6 of the tapered tube 17 and the lower magnetic yoke 5 into the magnetic separation pipeline 2. The excitation coil 3 is energized to generate a magnetic field to absorb magnetic particle impurities. The servo motor 13 drives the centrifugal drum 15 to rotate through the rotating shaft 14. The centrifugal drum 15 drives the calcium carbonate digestion slurry in the magnetic separation pipeline 2 to centrifugal motion. On the basis of magnetic force, the centrifugal drum 15 exerts centrifugal force on the magnetic particle impurities to move around and close to the inner wall of the magnetic separation pipeline 2, making it easier for them to be absorbed and removed by the magnetic field generated by the excitation coil 3, thereby improving the magnetic separation efficiency;

[0026] After a period of use, the delivery pump and the refined slurry valve 20 are closed to allow the calcium carbonate digestion slurry in the magnetic separation pipeline 2 to flow back, then the power supply of the excitation coil 3 and the raw material valve 18 are turned off, the waste valve 19 and the flushing valve 21 are opened, and clean water is input into the flushing pipe 12. At the same time, the servo motor 13 drives the centrifugal drum 15 to accelerate, decelerate, and rotate forward and flip at a constant speed to flush and remove the magnetic particle impurities in the magnetic separation pipeline 2, and discharge them from the waste pipe 9 to complete the magnetic separation.

[0027] It should be noted that, in this document, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A calcium carbonate digestion slurry magnetic separation device, comprising a magnetic separator housing (1), a magnetic separation pipe (2) vertically installed inside the magnetic separator housing (1), and an excitation coil (3) installed inside the magnetic separator housing (1) and arranged on the surface of the magnetic separation pipe (2), characterized in that: An upper magnetic yoke (4) and a lower magnetic yoke (5) corresponding to the position of the exciting coil (3) are respectively installed on the top and bottom of the magnetic separator housing (1); a flow channel (6) is provided on the upper magnetic yoke (4) and the lower magnetic yoke (5) at positions corresponding to the magnetic separation pipe (2); a lower connecting pipe (7) connected to the flow channel (6) is provided below the lower magnetic yoke (5); and a raw material pipe (8) and a waste pipe (9) are respectively connected to the lower connecting pipe (7); An upper connecting pipe (10) connected to the flow channel (6) is provided above the upper magnetic yoke (4), and a refined pulp pipe (11) and a flushing pipe (12) are respectively connected to the upper connecting pipe (10). A servo motor (13) is installed on the top of the lower connecting pipe (7), and the output shaft of the servo motor (13) is connected to a rotating shaft (14). The rotating shaft (14) passes through the upper connecting pipe (10) and the upper magnetic yoke (4) and is connected to a centrifugal drum (15) provided inside the magnetic separation pipeline (2).

2. A calcium carbonate digestion slurry magnetic separation device according to claim 1, characterized in that: The flow channels (6) on the upper magnetic yoke (4) and the lower magnetic yoke (5) are evenly arranged in the corresponding areas of the magnetic separation pipeline (2).

3. The calcium carbonate digestion slurry magnetic separation device according to claim 1, characterized in that: A guide opening (16) is provided on the upper surface of the lower magnetic yoke (5) at a position corresponding to the flow channel (6).

4. The calcium carbonate digestion slurry magnetic separation device according to claim 1, characterized in that: A tapered tube (17) with a larger upper portion and a smaller lower portion is provided between the lower magnetic yoke (5) and the lower connecting tube (7).

5. The calcium carbonate digestion slurry magnetic separation device according to claim 1, characterized in that: The raw material pipe (8), waste material pipe (9), refined pulp pipe (11) and flushing pipe (12) are respectively equipped with a raw material valve (18), a waste material valve (19), a refined pulp valve (20) and a flushing valve (21).

6. The calcium carbonate digestion slurry magnetic separation device according to claim 1, characterized in that: The opposite surfaces of the upper magnetic yoke (4) and the lower magnetic yoke (5) are both provided with shaft seats (22) rotatably connected to the rotating shaft (14).

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