Secondary thinner type counter-current magnetic separator

Abstract

The utility model discloses a secondary thinner type countercurrent magnetic separator, which relates to the technical field of magnetic separators, and comprises a rack, a roller is rotatably arranged on the rack, the roller is connected with a driving device, the internal space of the roller is divided into a fan-shaped magnetic field area and a fan-shaped non-magnetic field area by taking the circle center of the roller as the center, and a magnet is arranged in the magnetic field area; a feeding box communicated with a feeding port of the magnetic separation area is arranged on the left side of the magnetic separation area, and a tailing port is formed in the bottom of the magnetic separation area. The magnetic separation area is further communicated with a dilution water pipe to provide dilution water for raw materials in the magnetic separation area; a concentrate opening used for collecting concentrate is formed in the outer side of the non-magnetic field area, and a flushing device is arranged above the concentrate opening. According to the utility model, raw materials can be in full contact with the magnetic separator, the screening is more sufficient, the screening speed is higher, the screening is more thorough, screened magnetic substances can be well brought out of a magnetic field area, the magnetic substances can be separated from the magnetic separator more sufficiently, meanwhile, the magnetic substances can be prevented from flowing back, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic separators, in particular to a secondary thinner type countercurrent magnetic separator. Background Art

[0002] A magnetic separator is a screening device used to remove magnetic substances from powdery and granular materials. Its principle is that when the pulp enters the magnetic field area, the strongly magnetic minerals are adsorbed on the surface of the drum, and the weakly magnetic and non-magnetic minerals are washed out by water flow. The magnetic minerals adsorbed on the surface of the drum rotate with the drum and are taken out of the magnetic field area, and are flushed into the concentrate tank with washing water to complete the separation operation. Magnetic separators are widely used in resource recovery and wet magnetic separation of various minerals, and are also used for iron removal operations of materials such as coal, non-metallic minerals, and building materials. They are one of the most widely used and highly versatile machine types in the industry. Magnetic separators can greatly improve production efficiency, reduce floor space, and lower labor costs.

[0003] During the process of screening materials by a magnetic separator, it often happens that due to the raw materials being in a slurry state, sticking together, not being easily dispersed, and not being able to fully contact the magnets of the magnetic separator, the screening is not sufficient. In currently used magnetic separators, the distribution of the magnets inside is unreasonable, and the sector angle of the magnetic field area is usually only 180 degrees, or even smaller. As a result, the magnetic substances screened out cannot rotate well with the drum and be taken out of the magnetic field area. Some magnetic substances will continue to flow back into the magnetic separator, mix with the raw materials, or directly enter the tailings and be discharged, resulting in low screening efficiency. Moreover, some of the separated magnetic substances will continue to adhere to the drum of the magnetic separator and cannot be completely separated from the magnetic separator, affecting the magnetism of the magnetic separator. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a secondary thinner type countercurrent magnetic separator, which can enable the raw materials to fully contact the magnetic separator, with more sufficient screening, faster screening speed, more thorough screening, the screened magnetic substances can be well taken out of the magnetic field area, and be more fully separated from the magnetic separator. At the same time, it can also prevent the magnetic substances from flowing back and improve work efficiency.

[0005] The utility model includes a frame, on which a drum is rotatably arranged. The drum is connected to a driving device. The internal space of the drum is centered on the center of the drum and is divided into a sector-shaped magnetic field area and a non-magnetic field area. Magnets are arranged in the magnetic field area. Below the drum is a magnetic separation area. On the left side of the magnetic separation area is a feed box communicating with the feed inlet of the magnetic separation area. At the bottom of the magnetic separation area is a tailings port. The magnetic separation area is also communicated with a dilution water pipe to provide dilution water for the raw materials in the magnetic separation area. Outside the non-magnetic field area is a concentrate port for collecting concentrate, and above the concentrate port is a flushing device.

[0006] Preferably, the flushing device includes a long strip-shaped outer shell that is enclosed on all sides and has an opening at the upper part. The left side wall of the outer shell is bent downward to form a flushing port. A flushing pipe is arranged inside the outer shell, flushing holes are arranged on the flushing pipe, and the flushing pipe is communicated with a water inlet pipe.

[0007] Preferably, the flushing holes are located on the side of the flushing port of the flushing device. A baffle is arranged above the flushing pipe, and a gap for water to pass through is left between the right side of the baffle and the right side wall of the outer shell.

[0008] Preferably, the upper side surface of the baffle is lower than the highest point of the flushing port.

[0009] Preferably, the central angle of the magnetic field area is between 240 degrees and 270 degrees.

[0010] Preferably, the two dividing lines between the magnetic field area and the non-magnetic field area are located on the same side of the vertical center line of the roller.

[0011] In summary, the utility model has the following beneficial effects:

[0012] 1. The magnetic separation area is communicated with the dilution water pipe to provide dilution water for the raw materials in the magnetic separation area. After the paste-like raw materials are diluted by the dilution water, their texture becomes thinner, they are easily dispersed, can fully contact with the roller, achieving a better screening effect and not easily causing waste of raw materials;

[0013] 2. The enlarged magnetic field area enables magnetic substances to rotate well with the roller and be carried out of the magnetic field area. Moreover, the magnetic field area is located on one side of the vertical center line of the roller, and the non-magnetic field area is located on the other side of the vertical center line of the roller. The two dividing lines between them are located on the same side of the vertical center line of the roller, preventing the problem that in a traditional magnetic separator, due to the small design and unreasonable layout of the magnetic field area, magnetic substances will continue to flow back into the magnetic separator, mix with the raw materials, or directly enter the tailings and be discharged, improving the screening efficiency;

[0014] 3. A baffle is arranged above the flushing device, which plays a buffering role on the water pressure, preventing the flushing water from directly flushing the surface of the roller, causing splashing of the flushing water, affecting the working environment, and resulting in the loss of concentrate. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of a secondary diluent type countercurrent magnetic separator of the utility model;

[0016] Figure 2 is a schematic diagram of the internal working principle;

[0017] Figure 3 is Figure 2 the enlarged view at A in

[0018] Figure 4 is a schematic structural diagram of the flushing device;

[0019] Figure 5 It is a partial sectional view of the flushing device.

[0020] In the figure: 1. Frame; 2. Drum; 3. Driving device; 4. Magnetic field area; 5. Non-magnetic field area; 6. Magnet; 7. Magnetic separation area; 8. Feeding port; 9. Feeding box; 10. Tailings port; 11. Dilution water pipe; 12. Concentrate port; 13. Flushing device; 131. Shell; 132. Flushing port; 133. Flushing pipe; 134. Flushing hole; 135. Baffle; 136. Connector; 14. Water inlet pipe; 15. Scraper. Specific implementation mode

[0021] The present utility model will be further described below in conjunction with the accompanying drawings.

[0022] The orientations involved in this specification are subject to the orientations when a secondary diluent type countercurrent magnetic separator of the present utility model is working properly, without limiting its orientations during storage and transportation, only representing relative positional relationships and not absolute positional relationships.

[0023] As Figures 1 to 5 As commonly shown, a secondary diluent type countercurrent magnetic separator includes a frame 1. A drum 2 is rotatably arranged on the frame 1. The drum 2 is connected to a driving device 3. Preferably, in this solution, the driving device 3 includes a motor and a transmission device, and the motor drives the drum 2 to rotate through the transmission device; the internal space of the drum 2 is centered on the center of the drum 2 and is divided into a fan-shaped magnetic field area 4 and a non-magnetic field area 5. Magnets 6 are arranged in the magnetic field area 4; a magnetic separation area 7 is arranged below the drum 2. The magnetic separation area 7 is an arc-shaped structure with a narrow space between it and the outer contour of the drum 2. An inlet box 9 communicating with the feeding port 8 of the magnetic separation area 7 is arranged on the left side of the magnetic separation area 7. The materials in the inlet box 9 are pumped into the magnetic separation area 7 through a pressurizing device. After being thinned and dispersed in the narrow space of the magnetic separation area 7, the magnetic substances are attracted by the magnets 6, follow the drum 2 to roll, and are taken out to the non-magnetic field area 5 for collection; a tailings port 10 is arranged at the bottom of the magnetic separation area 7, and the substances remaining after screening are discharged through the tailings port 10; the magnetic separation area 7 is also communicated with a dilution water pipe 11 to provide dilution water for the raw materials in the magnetic separation area 7. After the dilution water is mixed with the raw materials, the raw materials are broken up and diluted, so that the raw materials are more easily dispersed and come into fuller contact with the drum 2.

[0024] Outside the non-magnetic field area 5, there is a concentrate outlet 12 for collecting concentrates. Above the concentrate outlet 12, there is a flushing device 13; the flushing device 13 includes a long strip-shaped housing 131 that is sealed on all sides and has an opening at the upper part. The left side wall of the housing 131 is bent downward to form a flushing opening 132. The angle between the flushing opening 132 and the tangent of the drum 2 here is about 90 degrees. Inside the housing 131, there is a flushing pipe 133. The flushing pipe 133 is provided with flushing holes 134. The flushing pipe 133 is connected to the water inlet pipe 14 through a connector 136; the flushing holes 134 are located on the side of the flushing opening 132 of the flushing device 13. Above the flushing pipe 133, there is a baffle 135. There is a gap for water to pass through between the right side of the baffle 135 and the right side wall of the housing 131; the upper side of the baffle 135 is lower than the highest point of the flushing opening 132; after water enters the flushing pipe 133, it flows out through the flushing holes 134, first enters the housing 131. Under the action of the baffle 135, the water cannot be directly sprayed out. It needs to move upward through the gap between the right side of the baffle 135 and the right side wall of the housing 131, gather above the baffle 135, and only after the water level crosses the flushing opening 132 can it flow out from the flushing opening 132 to flush the magnetic substances attached to the outer surface of the drum 2; the flushed magnetic substances are collected through the concentrate outlet 12; for the flushing device 13 with this structure, the baffle 135 plays a buffering role in the water pressure, which can prevent the flushing water from directly flushing the surface of the drum 2, causing the flushing water to splash, affecting the working environment, and causing the loss of concentrates.

[0025] Further, the central angle of the magnetic field area 4 is between 240 degrees and 270 degrees; the two dividing lines of the sectors of the magnetic field area 4 and the non-magnetic field area 5 are located on the same side of the vertical center line of the drum 2, so as to ensure that the highest point of the non-magnetic field area 5 crosses the vertex of the cross-section of the drum 2. The larger magnetic field range makes the adsorption area of the magnetic separator wider and the adsorption ability stronger, which can bring out the adsorbed magnetic substances from the non-magnetic area, make them fully separated from the tailings, and can better collect the magnetic substances to prevent the magnetic substances on the drum 2 from flowing back.

[0026] During use, the driving device 3 drives the drum 2 to rotate. The slurry-like raw materials are fed into the magnetic separation area 7 through the pressurizing device, and at the same time, water is supplied to it through the dilution water pipe 11. After being diluted into a thin state, the raw materials are spread out and dispersed in the narrow space of the magnetic separation area 7. The magnetic substances are attracted by the magnet 6, follow the drum 2 to roll, and are taken out to the non-magnetic field area 5, while the remaining substances after screening are discharged through the tailings outlet 10; there is no magnet 6 inside the non-magnetic field area 5, so there is no attraction. Some magnetic substances will automatically separate from the drum 2 and enter the concentrate outlet 12 to be collected, while some magnetic substances attached to the drum 2 are flushed by the flushing water; at the same time, on the side of the non-magnetic field area 5, there is also a scraper 15, which can further scrape the substances attached to the outer surface of the drum 2.

[0027] Certainly, the above description is not a limitation to the present utility model, nor is the present utility model limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the essence of the present utility model shall also fall within the protection scope of the present utility model.

Claims

1. A secondary thin material countercurrent magnetic separator, characterized in that: The invention comprises a frame (1), on which a drum (2) is rotatably arranged, the drum (2) being connected to a driving device (3), the internal space of the drum (2) being divided into a fan-shaped magnetic field area (4) and a non-magnetic field area (5) with the center of the drum (2) as the center, the magnetic field area (4) being provided with a magnet (6); a magnetic separation area (7) being provided below the drum (2), a feed box (9) being provided on the left side of the magnetic separation area (7) and being connected to a feed port (8) of the magnetic separation area (7), a tailings port (10) being provided at the bottom of the magnetic separation area (7); the magnetic separation area (7) being also connected to a dilution water pipe (11) to provide dilution water for the raw materials in the magnetic separation area (7); a concentrate port (12) for collecting concentrate is provided on the outside of the non-magnetic field area (5), and a flushing device (13) is provided above the concentrate port (12).

2. A secondary thin material countercurrent magnetic separator as claimed in claim 1, characterized in that: The flushing device (13) comprises a long strip-shaped shell (131) which is sealed on all sides and has an opening on the top. The left side wall of the shell (131) is bent downward to form a flushing port (132). A flushing pipe (133) is provided in the shell (131). A flushing hole (134) is provided on the flushing pipe (133). The flushing pipe (133) is connected to the water inlet pipe (14).

3. A secondary thin material countercurrent magnetic separator as claimed in claim 2, characterized in that: The flushing hole (134) is located on the flushing port (132) side of the flushing device (13), a baffle (135) is provided above the flushing pipe (133), and a gap for water to pass through is left between the right side of the baffle (135) and the right side wall of the housing (131).

4. A secondary thin material countercurrent magnetic separator as claimed in claim 3, characterized in that: The upper side surface of the baffle (135) is lower than the highest point of the flushing port (132).

5. A secondary thin material countercurrent magnetic separator as claimed in claim 1, characterized in that: The central angle of the magnetic field region (4) is between 240 degrees and 270 degrees.

6. A secondary thin material countercurrent magnetic separator as claimed in claim 5, characterized in that: The two dividing lines between the magnetic field area (4) and the non-magnetic field area (5) are located on the same side of the vertical center line of the drum (2).

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