A semi-counterflow magnetic separator

Abstract

The utility model relates to the technical field of magnetic separator, concretely to a kind of semi-counterflow magnetic separator, including support frame, and middle part is fixedly connected with groove body, and the top end middle part of groove body is provided with rolling mechanism;Top frame, its fixed connection is in the left side top of support frame both ends, and cleaning mechanism is set on the top frame of both ends;The cleaning mechanism is matched with rolling mechanism.The utility model reaches the effect of real-time removal of dirt layer on the surface of drum, maintaining the optimum magnetic field adsorption distance by the constant pressure effect of scraper under the spring, effectively solve the problem of magnetic field attenuation, separation recovery rate and concentrate grade decline caused by dirt accumulation.

Description

Technical Field

[0001] This utility model relates to the field of magnetic separator technology, specifically a semi-countercurrent magnetic separator. Background Technology

[0002] Magnetic separators are screening devices used to remove iron powder from reusable powdery particles. They are also used for iron removal in coal, non-metallic minerals, building materials, etc. Among them, semi-countercurrent magnetic separators are key equipment for mineral separation in the metallurgical industry. Their working method combines the characteristics of countercurrent magnetic systems with the operational advantages of cylindrical structures, making them suitable for magnetic separation of medium-sized materials.

[0003] A semi-countercurrent magnetic separator, as disclosed in authorization announcement number CN220759558U, includes a support frame with support seats on both sides of the top; a feed box disposed between the inner sides of the support frame; a drive mechanism disposed on the right side of the support seats at the top of the support frame; a rotating assembly disposed between the support seats and on the outer surface of the drive assembly; a transmission mechanism disposed on the left side of the left end of the support seats to drive the rotating assembly to rotate; and an auxiliary discharge mechanism. The beneficial effects of adopting the above technical solution are: it makes the connection with the transmission wheel tighter, thereby improving its transmission effect and increasing processing efficiency.

[0004] While the aforementioned patents can improve transmission efficiency and processing efficiency, under long-term continuous operation, the surface of the rotating drum is prone to adsorbing and accumulating a mixed fouling layer formed by fine particles, dust, oil, etc. in the slurry. This fouling layer forms a non-magnetic physical barrier between the rotating drum surface and the minerals to be sorted, increasing the effective distance between magnetic particles and the magnetic system. Since the magnetic field strength is inversely proportional to the square of the distance, even a very thin fouling layer will cause the magnetic field adsorption force to decrease sharply. The direct consequence is a decrease in the ability to capture weakly magnetic minerals or fine particles, while impurities are more easily entrained, leading to a reduction in concentrate grade. Utility Model Content

[0005] The purpose of this invention is to provide a semi-countercurrent magnetic separator to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A semi-countercurrent magnetic separator, comprising A support frame, with a trough fixedly connected to its middle section, and a rolling mechanism provided at the top center of the trough; The top frame is fixedly connected to both ends of the top left side of the support frame, and a cleaning mechanism is provided on the top frame at both ends; The cleaning mechanism works in conjunction with the rolling mechanism.

[0007] Preferably, the rolling mechanism includes a frame fixedly connected to the outside of the top end of one side of the support frame, and end caps fixedly connected to both sides of the inner wall of the tank. A roller is rotatably connected between the two end caps. The right roller is rotatably connected to the right side of the support frame through a bearing, and the left roller is rotatably connected to the left side of the support frame through a bearing. A motor is fixedly connected to the top end of the frame, and the output shaft of the motor is fixedly connected to the left end of the roller through a coupling. Preferably, the cleaning mechanism includes a rotating frame that is horizontally fixedly connected between the top ends of the two top frames, and a mounting plate disposed below the rotating frame. A scraper is fixedly connected to the bottom end of the mounting plate by bolts. The end face of the scraper slides in contact with the outer periphery of the roller. Several pressure rods are fixedly connected side by side to the top end of the mounting plate. Several movable holes are opened side by side to the top end of the rotating frame. The top end of the pressure rod slides through the movable holes and is fixedly connected with a retaining ring. Preferably, a spring is movably sleeved on the outside of the pressure rod, with both ends of the spring abutting against the retaining ring and the rotating frame, respectively. A telescopic dust cover is movably sleeved on the outside of the spring, with both ends of the telescopic dust cover being fixedly connected to the retaining ring and the rotating frame, respectively. Preferably, the right side of the rotating frame is rotatably connected to the right top frame via a bearing, and the left side of the rotating frame is rotatably connected to the left top frame via a bearing. A rotating arm is provided on the outside of the left top frame, and the rotating arm is fixedly connected to the rotating frame via a transmission shaft. A second fixed shaft is fixedly connected to the front of the bottom end of the rotating arm, and a first fixed shaft is fixedly connected to the outer side of the bottom end of the left top frame. An electric push rod is provided between the second fixed shaft and the first fixed shaft, and the two ends of the electric push rod are rotatably connected to the first fixed shaft and the second fixed shaft via rotating sleeves, respectively. Preferably, a positioning block is fixedly connected to the top of the top frame on the left, and a threaded hole is provided in the middle of the positioning block. A locking screw is threadedly connected to the end of the rotating arm away from the fixed shaft, and the locking screw matches the threaded hole.

[0008] Compared with the prior art, the beneficial effects of this utility model are: This semi-countercurrent magnetic separator achieves the effect of real-time removal of dirt layer on the drum surface and maintaining the optimal magnetic field adsorption distance by continuously sliding the scraper against the outer surface of the drum under the constant pressure provided by the spring. It effectively solves the problems of magnetic field attenuation, separation recovery rate and concentrate grade reduction caused by dirt accumulation.

[0009] This semi-countercurrent magnetic separator uses an electric push rod to drive the rotating arm and rotate the rotating frame outward, which enables the cleaning mechanism to be quickly moved out of the work area, solving the problem of limited operating space when replacing and maintaining the scraper. Attached Figure Description

[0010] Figure 1This is a schematic diagram of the overall main structure of this utility model; Figure 2 This is a schematic diagram of the mounting plate installation structure of this utility model; Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle; Figure 4 For the present utility model Figure 2 Enlarged diagram of point B in the middle.

[0011] In the diagram: 1. Support frame; 2. Tank; 3. Top frame; 4. Frame; 5. Roller; 6. End cover; 7. Motor; 8. Mounting plate; 9. Scraper; 10. Pressure rod; 11. Movable hole; 12. Retaining ring; 13. Spring; 14. Rotating frame; 15. Rotating arm; 16. Fixed shaft two; 17. Fixed shaft one; 18. Electric push rod; 19. Rotating sleeve; 20. Positioning block; 21. Locking screw. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] like Figure 1-4 As shown, this utility model provides a technical solution: A semi-countercurrent magnetic separator includes a support frame 1, with a tank 2 fixedly connected to its middle section. A rolling mechanism is provided at the top center of the tank 2. The rolling mechanism includes a frame 4 fixedly connected to the outside of one side of the top of the support frame 1, and end caps 6 fixedly connected to both sides of the inner wall of the tank 2. A roller 5 is rotatably connected between the two end caps 6. The right roller 5 is rotatably connected to the right side of the support frame 1 via a bearing, and the left roller 5 is rotatably connected to the left side of the support frame 1 via a bearing. A motor 7 is fixedly connected to the top of the frame 4, and the output shaft of the motor 7 is fixedly connected to the left end of the roller 5 via a coupling. The top frame 3 is fixedly connected to the top left ends of the support frame 1. A cleaning mechanism is installed on each of the top frames 3. The cleaning mechanism includes a rotating frame 14 horizontally fixed between the top ends of the two top frames 3, and a mounting plate 8 located below the rotating frame 14. A scraper 9 is bolted to the bottom end of the mounting plate 8, and the end face of the scraper 9 slides in contact with the outer periphery of the roller 5. Several pressure rods 10 are fixedly connected side-by-side to the top of the mounting plate 8. Several movable holes 11 are opened side-by-side at the top of the rotating frame 14, and the top ends of the pressure rods 10 slide through the movable holes 11 and are fixed. A retaining ring 12 is connected; the cleaning mechanism cooperates with the rolling mechanism; a spring 13 is movably sleeved on the outside of the pressure rod 10, with both ends of the spring 13 abutting against the retaining ring 12 and the rotating frame 14 respectively; a telescopic dust cover is movably sleeved on the outside of the spring 13, with both ends of the telescopic dust cover fixedly connected to the retaining ring 12 and the rotating frame 14 respectively; the right side of the rotating frame 14 is rotatably connected to the right top frame 3 via a bearing, and the left side of the rotating frame 14 is rotatably connected to the left top frame 3 via a bearing; a rotating arm 15 is provided on the outside of the left top frame 3, and the rotating arm 15 is fixed to the rotating frame 14 via a transmission shaft. The rotating arm 15 is connected to a fixed shaft 16 at the bottom front, and a fixed shaft 17 is fixedly connected to the bottom outer side of the left top frame 3. An electric push rod 18 is provided between the fixed shaft 16 and the fixed shaft 17. The two ends of the electric push rod 18 are rotatably connected to the fixed shaft 17 and the fixed shaft 16 respectively through a rotating sleeve 19. A positioning block 20 is fixedly connected to the top of the left top frame 3. A threaded hole is opened in the middle of the positioning block 20. A locking screw 21 is threadedly connected to the end of the rotating arm 15 away from the fixed shaft 16. The locking screw 21 matches the threaded hole. In this embodiment, by continuously sliding and contacting the scraper 9 with the outer surface of the drum 5 under the constant pressure provided by the spring 13, the dirt layer on the surface of the drum 5 is removed in real time, and the optimal magnetic field adsorption distance is maintained. This effectively solves the problem of magnetic field attenuation, sorting recovery rate and concentrate grade reduction caused by dirt accumulation.

[0014] Furthermore, by using the electric push rod 18 to push the rotating arm 15 to drive the rotating frame 14 to rotate outward, the cleaning mechanism can be quickly moved out of the work area, solving the problem of limited operating space when replacing and maintaining the scraper 9.

[0015] Working principle: The slurry is fed into the tank 2 through the feed inlet and forms a sorting zone within it. Motor 7 drives drum 5 to rotate continuously, while the magnetic system fixed inside remains stationary. Magnetic particles in the slurry are attracted to the outer surface of drum 5 under the influence of the magnetic field and move upwards with it. Simultaneously, non-magnetic particles first flow in the sorting zone in the opposite direction to the rotation of drum 5, then flow in the same direction as drum 5 and are discharged from the tailings outlet. The magnetic particles adsorbed on the surface of drum 5 rotate with it to the concentrate discharge point, where they detach from the surface of drum 5 under the action of washing water, gravity, and centrifugal force, falling into the concentrate collection tank to complete the sorting. Meanwhile, the cleaning mechanism always cooperates with the rolling mechanism, and scraper 9... Under the constant pressure provided by the spring 13 and the pressure rod 10, the scraper slides tightly against the outer circumference of the drum 5, promptly scraping off the dirt layer attached to the surface of the drum 5 to prevent it from affecting the sorting effect. When the scraper 9 needs to be replaced, the electric push rod 18 is activated to push out the rotating arm 15, thereby driving the rotating frame 14 to rotate outward around its connection point with the top frame 3, rotating and moving the mounting plate 8 and the scraper 9 out of the working area above the drum 5, exposing the scraper 9 for easy replacement. After replacement, the electric push rod 18 retracts and pulls the rotating frame 14 back to the working position. At this time, the locking screw 21 on the rotating arm 15 is tightened so that its end is screwed into the threaded hole of the positioning block 20, thereby reliably locking the entire cleaning mechanism in the working position.

[0016] It should be noted that, in the specific implementation of this technical solution, the separation working principle of the semi-countercurrent magnetic separator, including the feeding of slurry, the adsorption of magnetic particles onto the drum surface under the action of the magnetic field, the discharge of non-magnetic particles from the tailings outlet by the scouring action of the countercurrent slurry, and the separation of magnetic particles from the concentrate discharge point and their fall into the collection tank, adopts conventional existing technology in this field. Although this working principle is not described in detail herein, it belongs to the standard operating procedure known to those skilled in the art. Its magnetic system configuration, tank form, feeding and discharging methods, etc., can all be configured and adjusted according to actual separation needs using conventional technical means in this field.

[0017] The core innovation of this technical solution lies in its specially designed cleaning mechanism, which addresses the long-standing technical defect of "easy scaling on the drum surface" in existing sorting principles. This mechanism includes a scraper 9, an elastic clamping assembly, and an electric swing drive mechanism. This cleaning mechanism, in conjunction with the existing sorting system, constitutes a complete, self-cleaning, and highly efficient magnetic separator. The specific structure and operation of the cleaning mechanism are fully disclosed in this solution. Its beneficial effect is that it solves a series of problems explicitly pointed out in the background art, without affecting the implementation of the existing sorting principle itself.

[0018] In the specific implementation of this technical solution, the spring 13 can be externally configured with conventional telescopic dust covers (such as corrugated tube type, sleeve type, or braided sheath, etc.). Although such protective devices are not described in detail in the technical solution, they are components that can be conventionally selected by those skilled in the art based on actual dustproof, waterproof, or foreign object protection needs. Their selection and installation methods follow well-known technologies in this field and do not affect the implementation of the core innovation of this solution. In practical applications, the telescopic dust cover is mainly used to prevent dust, slurry, or moisture from entering the spring, avoiding spring corrosion, jamming, or failure. However, its specific type and connection method can be adjusted according to production requirements, all of which fall within the reasonable extension scope of this technical solution.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A semi-countercurrent magnetic separator, characterized in that: include The support frame (1) has a groove (2) fixedly connected in its middle, and a rolling mechanism is provided at the top center of the groove (2); The top frame (3) is fixedly connected to the top two ends of the left side of the support frame (1), and a cleaning mechanism is provided on the top frame (3) at both ends; The cleaning mechanism works in conjunction with the rolling mechanism.

2. A semi-countercurrent magnetic separator according to claim 1, characterized in that: The rolling mechanism includes a frame (4) fixedly connected to the outside of the top of one side of the support frame (1), and end caps (6) fixedly connected to both sides of the inner wall of the trough (2). A roller (5) is rotatably connected between the two end caps (6). The right roller (5) is rotatably connected to the right side of the support frame (1) through a bearing, and the left roller (5) is rotatably connected to the left side of the support frame (1) through a bearing. A motor (7) is fixedly connected to the top of the frame (4), and the output shaft of the motor (7) is fixedly connected to the left end of the roller (5) through a coupling.

3. A semi-countercurrent magnetic separator according to claim 1, characterized in that: The cleaning mechanism includes a rotating frame (14) that is horizontally fixed between the top ends of the two top frames (3), and a mounting plate (8) located below the rotating frame (14). The bottom end of the mounting plate (8) is fixedly connected to a scraper (9) by bolts. The end face of the scraper (9) slides in contact with the outer periphery of the roller (5). Several pressure rods (10) are fixedly connected side by side at the top end of the mounting plate (8). Several movable holes (11) are opened side by side at the top end of the rotating frame (14). The top end of the pressure rod (10) slides through the movable hole (11) and is fixedly connected to a retaining ring (12).

4. A semi-countercurrent magnetic separator according to claim 3, characterized in that: The pressure rod (10) is externally fitted with a spring (13), the two ends of the spring (13) abut against the retaining ring (12) and the rotating frame (14) respectively. The spring (13) is externally fitted with a telescopic dust cover, the two ends of the telescopic dust cover are fixedly connected to the retaining ring (12) and the rotating frame (14) respectively.

5. A semi-countercurrent magnetic separator according to claim 4, characterized in that: The right side of the rotating frame (14) is rotatably connected to the right top frame (3) via a bearing, and the left side of the rotating frame (14) is rotatably connected to the left top frame (3) via a bearing. A rotating arm (15) is provided on the outside of the left top frame (3). The rotating arm (15) and the rotating frame (14) are fixedly connected via a transmission shaft. A second fixed shaft (16) is fixedly connected to the front of the bottom end of the rotating arm (15). A first fixed shaft (17) is fixedly connected to the outer side of the bottom end of the left top frame (3). An electric push rod (18) is provided between the second fixed shaft (16) and the first fixed shaft (17). The two ends of the electric push rod (18) are rotatably connected to the first fixed shaft (17) and the second fixed shaft (16) via a rotating sleeve (19).

6. A semi-countercurrent magnetic separator according to claim 5, characterized in that: The top of the top frame (3) on the left is fixedly connected to a positioning block (20), and a threaded hole is provided in the middle of the positioning block (20). The end of the rotating arm (15) away from the fixed shaft (16) is threadedly connected to a locking screw (21), and the locking screw (21) matches the threaded hole.

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