Tungsten concentrate ultrafine grinding mill and grinding method

Abstract

This invention discloses an ultrafine grinding mill for tungsten concentrate and its grinding method, relating to the field of grinding mill technology. It includes a vertical cylinder, a transmission mechanism, and a support frame. The support frame is installed at the top of the vertical cylinder, and an upper shaft is installed inside the vertical cylinder. The transmission mechanism is located at the top of the vertical cylinder. Side grinding components, intermediate grinding components, and bottom grinding components are installed from top to bottom inside the vertical cylinder. The side grinding components include a side grinding plate and an inclined plate. Abrasive surfaces are provided on opposite sides of the hinged grinding plate and the side grinding plate. An adjusting component is installed on the opposite side of the hinged grinding plate. The intermediate grinding components include an upper grinding plate and a lower grinding plate, with grinding teeth between them. The upper shaft drives the upper grinding plate to rotate. The bottom grinding components include a lower shaft filled with multiple sets of grinding balls. A feed inlet is installed on the upper side of the vertical cylinder, and a discharge port is installed at the bottom. This invention addresses the technical problems of current grinding structures being simple and prone to abrasive loss and excessive energy consumption when using ball milling.

Description

Technical Field

[0001] This invention relates to the field of mineral grinding technology, specifically to an ultrafine grinding mill for tungsten concentrate and its grinding method. Background Technology

[0002] Tungsten concentrate is an important tungsten ore, including two types: wolframite and scheelite. Wolframite (Fe,Mn)WO4 contains approximately 76% WO3, while scheelite (CaWO4) contains approximately 80% WO3. It is a major raw material for the production of tungsten compounds such as ferrotungsten, sodium tungstate, ammonium paratungstate (APT), and ammonium metatungstate (AMT). Fine grinding of the raw material can facilitate subsequent production and processing.

[0003] Fine grinding typically employs ball mills to crush and grind materials. Ball mills primarily rely on the grinding media within the cylinder, such as steel or ceramic balls, for their impact and grinding effect on the materials. For example, CN202411237850.3 describes a mining ball mill with a fine ore feeding device, which is a ball mill structure.

[0004] However, existing ball mill abrasive structures suffer from several drawbacks. First, the grinding cycle is long, leading to low production efficiency. Second, energy consumption is high, as the ball mill operates at low speeds and has long grinding cycles, resulting in relatively high energy consumption per unit output. Furthermore, most grinding processes rely on the collision of ceramic balls throughout, which can easily cause damage and lead to excessively high maintenance costs. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an ultrafine grinding mill for tungsten concentrate, comprising a vertical cylinder, a transmission mechanism and a support frame, wherein the support frame is installed on the top of the vertical cylinder, and an upper shaft is installed inside the vertical cylinder; the transmission mechanism is located at the top of the vertical cylinder and is adapted to drive the upper shaft to rotate.

[0006] The side grinding component, the middle grinding component, and the bottom grinding component are installed from top to bottom inside the vertical cylinder.

[0007] The side grinding component includes a side grinding plate and an inclined plate; the side grinding plate is fixedly installed on the inner wall of the vertical cylinder, and a hinged grinding plate is hingedly installed under the inclined plate; both the hinged grinding plate and the side grinding plate are provided with abrasive surfaces on opposite sides; an adjustment component is installed on the back side of the hinged grinding plate, and the adjustment component is adapted to adjust the angle position of the hinged grinding plate under the inclined plate.

[0008] The intermediate grinding component includes an upper grinding plate and a lower grinding plate, with grinding teeth provided between the upper and lower grinding plates; the upper shaft drives the upper grinding plate to rotate.

[0009] The bottom grinding component includes a lower shaft, which is filled with multiple sets of grinding balls;

[0010] A feed inlet is installed on the upper side of the vertical cylinder, and a discharge port is installed at the bottom; a bottom motor is installed at the bottom of the vertical cylinder, and the output axis of the bottom motor is axially upward and coaxially connected to the lower shaft.

[0011] In a further technical solution, the inclined plate is tilted downwards towards the feed inlet; and a hinged grinding plate and a side plate are installed at the bottom of the inclined plate, with the side plate fixedly installed at the bottom of the inclined plate and located on both sides of the hinged grinding plate; the upper shaft passes through the inclined plate, and a slanted pull groove is also installed on the inclined plate.

[0012] In a further technical solution, the transmission mechanism includes a rotating disk, on which a drive shaft is mounted. The end of the drive shaft extends into a vertical cylinder and is fitted with a drive motor. The drive motor is adapted to drive the rotating disk to rotate. A connecting rod is mounted on the rotating disk, one end of which is eccentrically hinged to the rotating disk, and the other end is hinged to the side of the hinged grinding plate opposite to the side grinding plate.

[0013] In a further technical solution, a fixing frame is installed inside the vertical cylinder. The two ends of the fixing frame are fixedly connected to the inner wall of the vertical cylinder, and a fixing ring is adopted in the middle, which is coaxially connected to the upper shaft. A flexible shaft is installed at the bottom, and the upper end of the flexible shaft is fixedly connected to the upper shaft. An upper support shell is installed outside the upper grinding plate, and the upper grinding plate is installed inside the upper support shell by installing a slewing bearing.

[0014] A closed cylinder is installed outside the flexible shaft, and the two ends of the closed cylinder are fixedly connected to the upper support shell and the fixed ring, respectively.

[0015] In a further technical solution, both the upper grinding plate and the upper support shell are inclined; both the upper grinding plate and the lower grinding plate are inclined from one side of the feed inlet to the other side; and the outer diameter of the upper grinding plate is larger than the outer diameter of the upper support shell.

[0016] In a further technical solution, the lower grinding plate is fixedly installed inside the vertical cylinder, and a liquid discharge hole is provided at the end away from the feed inlet. The liquid discharge hole is suitable for connecting the intermediate grinding component and the bottom grinding component.

[0017] The lower shaft is equipped with a stirring spiral blade.

[0018] In a further technical solution, a bottom box is installed at the bottom of the vertical cylinder, and an inclined guide channel and a liquid storage tank are installed inside the bottom box. A circulation pump is installed outside the discharge port. The inlet of the circulation pump is connected to the discharge port through an installation pipe, and the outlet of the circulation pump is connected to the inclined guide channel through an installation pipe.

[0019] A helical rod and a transmission component are installed inside an inclined guide channel. The transmission component drives the helical rod to rotate. The helical rod is inclined upward and has helical blades.

[0020] A connecting part is provided in the liquid storage tank, and a fixing plate is provided in the inclined guide channel; the top end of the spiral rod is connected to the connecting part through a connecting bearing, and the rod body is spirally connected to the fixing plate.

[0021] A second circulation pump is installed outside the feed inlet. The inlet of the second circulation pump is connected to the feed inlet through an installation pipe, and the outlet of the second circulation pump is connected to the liquid storage tank through an installation pipe, which extends to the bottom of the liquid storage tank.

[0022] In a further technical solution, a pressure relief channel is provided at the bottom of the inclined guide channel, one end of which is connected to the inclined guide channel; the other end is connected to the liquid storage tank.

[0023] The transmission component includes a drive wheel and a driven wheel. A pusher motor is coaxially mounted on the outside of the drive wheel, and the pusher motor is detachably installed in the bottom box and located above the fixed plate. The drive wheel and the driven wheel are connected by a transmission belt.

[0024] In a further technical solution, the transmission mechanism includes a large-diameter gear, the bottom of which is coaxially mounted with the upper shaft, and a small-diameter gear meshing with the large-diameter gear; and upper motors are respectively mounted on the top extended support frame, the output end of which is coaxially connected with the small-diameter gear; and multiple sets of small-diameter gears are provided.

[0025] The grinding method of tungsten concentrate using an ultrafine grinding mill includes the following steps:

[0026] Step 1: Pour the slurry into the storage tank and turn on the second circulation pump; pump the slurry to the feed inlet;

[0027] Step 2: The slurry enters the feed inlet, part of which enters between the articulated grinding plate and the side grinding plate, and part of which splashes onto the inclined plate and falls back to between the articulated grinding plate and the side grinding plate with the inclined pull chute;

[0028] Step 3: The drive motor starts the rotating disc to rotate, which continuously drives the connecting rod to rotate the hinged grinding plate and move it back and forth toward the lateral grinding plate.

[0029] Step 4: The upper motor drives the small diameter gear to rotate the large diameter gear, and multiple sets of small diameter gears rotate synchronously in the same direction; it drives the upper shaft located at the bottom of the large diameter gear, and the upper shaft drives the flexible shaft to rotate within the fixed ring. The upper and lower ends of the flexible shaft are connected to the closed cylinder through the mounting position bearing, and the bottom is fixedly connected to the upper grinding plate. The upper grinding plate is fixed by the inner ring of the slewing bearing, and the outer ring of the slewing bearing is fixed to the upper support shell.

[0030] Step 5: The inclined lower grinding plate allows the slurry to enter the lower liquid hole after being ground between the upper and lower grinding plates.

[0031] Step 6: The grinding balls are stirred by the spiral blades driven by the lower shaft screw to achieve abrasive processing;

[0032] Step 7: Once the circulating pump starts working, it drives the slurry into the bottom tank and drives the pusher motor to work; it drives the drive wheel, which drives the driven wheel through the transmission belt, and makes the screw rotate; it drives the slurry into the storage tank.

[0033] Step 8: The slurry located at the bottom of the inclined guide channel is discharged to the storage tank through the pressure relief channel;

[0034] Step 9: A sampling rod is installed outside the storage tank. The sampling rod is suitable for sampling the slurry to test the particle size. If the particle size does not meet the standard, repeat steps 1-8 and repeat the grinding.

[0035] Compared with existing technologies, it has the following advantages:

[0036] This invention utilizes two separate side grinding components to intermittently extrude and grind the slurry along its path, followed by a medium grinding component for fine grinding. Finally, a high-speed bottom grinding component uses grinding balls to perform high-speed friction and extrusion, further grinding the material. This invention achieves ultra-fine abrasive through multiple layers of grinding media. An eccentrically mounted wheel system drives a connecting rod and a hinged grinding plate, enabling reciprocating contact with the side grinding plates for grinding. A flexible shaft allows the tilted upper grinding plate to rotate and is supported within an upper support housing by a slewing bearing. A slurry pump is used within the bottom housing. Attached Figure Description

[0037] Figure 1 This is a cross-sectional schematic diagram of the fine grinding mill according to Embodiment 1 of the present invention;

[0038] Figure 2 for Figure 1 Enlarged view of part A;

[0039] Figure 3 for Figure 1 Enlarged view of part B;

[0040] Figure 4 This is a schematic diagram of the inclined plate of the present invention;

[0041] Figure 5 This is a structural diagram of the fixing frame of the present invention;

[0042] Figure 6 This is a cross-sectional schematic diagram of the fine grinding mill according to Embodiment 2 of the present invention;

[0043] Figure 7 for Figure 6 Enlarged view of part C;

[0044] Figure 8 for Figure 6Enlarged view of part D;

[0045] Figure 9 This is a schematic diagram of the meshing of a large-diameter gear and a small-diameter gear;

[0046] In the diagram: 1. Vertical cylinder; 2. Support frame; 3. Upper shaft; 4. Lateral grinding plate; 5. Inclined plate; 6. Hinged grinding plate; 7. Upper grinding plate; 8. Lower grinding plate; 9. Lower shaft; 10. Grinding ball; 11. Feed inlet; 12. Discharge port; 13. Bottom motor; 14. Side plate; 15. Rotating disc; 16. Drive shaft; 18. Connecting rod; 19. Fixing frame; 20. Fixing ring; 21. Flexible shaft; 2. Upper support shell; 23. Slewing bearing; 24. Closed cylinder; 25. Liquid inlet; 26. Bottom box; 27. Inclined guide channel; 28. Liquid storage tank; 29. ​​Circulation pump one; 30. Screw rod; 31. Fixed plate; 32. Circulation pump two; 33. Driving wheel; 34. Driven wheel; 35. Pusher motor; 36. Transmission belt; 37. Large diameter gear; 38. Small diameter gear; 39. Upper motor; 40. Sampling rod. Detailed Implementation

[0047] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] Example 1

[0049] Please see Figure 1-5 The present invention provides a technical solution for an ultrafine grinding mill for tungsten concentrate, comprising a vertical cylinder 1, a transmission mechanism and a support frame 2. The support frame 2 is installed on the top of the vertical cylinder 1, and an upper shaft 3 is installed inside the vertical cylinder 1. The transmission mechanism is located at the top of the vertical cylinder 1 and is adapted to drive the upper shaft 3 to rotate.

[0050] Inside the vertical cylinder 1, side grinding components, middle grinding components, and bottom grinding components are installed from top to bottom respectively;

[0051] The side grinding component includes a side grinding plate 4 and an inclined plate 5; the side grinding plate 4 is fixedly installed on the inner wall of the vertical cylinder 1, and a hinged grinding plate 6 is hingedly installed under the inclined plate 5; both the hinged grinding plate 6 and the side grinding plate 4 are provided with abrasive surfaces on opposite sides; an adjustment component is installed on the back side of the hinged grinding plate 6, which is suitable for adjusting the angle position of the hinged grinding plate 6 under the inclined plate 5;

[0052] The intermediate grinding component includes an upper grinding plate 7 and a lower grinding plate 8, with grinding teeth provided between the upper grinding plate 7 and the lower grinding plate 8; the upper shaft 3 drives the upper grinding plate 7 to rotate;

[0053] The bottom grinding component includes a lower shaft 9, which is filled with multiple sets of grinding balls 10; the size of the grinding balls is not limited to... Figure 1 Medium volume size.

[0054] A feed inlet 11 is installed on the upper side of the vertical cylinder 1, and a discharge port 12 is installed at the bottom. A bottom motor 13 is installed at the bottom of the vertical cylinder 1, with its output axis pointing upwards and coaxially connected to the lower shaft 9. This invention uses separate upper and lower side grinding components to intermittently extrude and grind the slurry along its path. Then, a medium grinding component performs fine grinding, sequentially grinding the slurry. Finally, the high-speed grinding balls of the bottom grinding component perform high-speed friction and extrusion, driving the material to be crushed. This invention achieves ultra-fine abrasive through multiple layers of grinding media.

[0055] like Figure 2 As shown, the inclined plate 5 is tilted downwards towards the feed inlet 11; and a hinged grinding plate 6 and a side plate 14 are installed at the bottom of the inclined plate. The side plate 14 is fixedly installed at the bottom of the inclined plate 5 and is located on both sides of the hinged grinding plate 6; the upper shaft 3 passes through the inclined plate 5, and a slanted groove is also installed on the inclined plate 5. The transmission mechanism includes a rotating disk 15, on which a drive shaft 16 is installed. The end of the drive shaft 16 extends out of the vertical cylinder 1 and is equipped with a drive motor; the drive motor is adapted to drive the rotating disk 15 to rotate; a connecting rod 18 is installed on the rotating disk 15, one end of which is eccentrically hinged to the rotating disk 15, and the other end is hinged to the side of the hinged grinding plate 6 opposite to the side grinding plate 4.

[0056] Combination Figure 3 and Figure 5 As shown, a fixed frame 19 is installed inside the vertical cylinder 1. The two ends of the fixed frame 19 are fixedly connected to the inner wall of the vertical cylinder 1, and a fixed ring 20 is used in the middle. The fixed ring 20 is coaxially connected to the upper shaft 3. A flexible shaft 21 is installed at the bottom, and the upper end of the flexible shaft 21 is fixedly connected to the upper shaft 3. An upper support shell 22 is installed outside the upper grinding plate 7. The upper grinding plate 7 is installed inside the upper support shell 22 by installing a slewing bearing 23. A closed cylinder 24 is installed outside the flexible shaft 21, and the two ends of the closed cylinder 24 are fixedly connected to the upper support shell 22 and the fixed ring 20, respectively.

[0057] like Figure 1 As shown, both the upper grinding plate 7 and the upper support shell 22 are inclined; both the upper grinding plate 7 and the lower grinding plate 8 are inclined from one side of the feed inlet 11 to the other side; and the outer diameter of the upper grinding plate 7 is larger than the outer diameter of the upper support shell 22.

[0058] The lower grinding plate 8 is fixedly installed inside the vertical cylinder 1, and a liquid discharge hole 25 is provided at the end away from the feed inlet 11. The liquid discharge hole 25 is suitable for connecting the intermediate grinding component and the bottom grinding component; a stirring spiral blade is provided on the lower shaft 9.

[0059] Example 2

[0060] like Figure 6-9 As shown, another embodiment of the present invention is provided. Based on embodiment 1, a bottom box 26 is installed at the bottom of the vertical cylinder 1. An inclined guide channel 27 and a liquid storage tank 28 are installed inside the bottom box 26. A circulation pump 29 is installed outside the discharge port 12. The inlet of the circulation pump 29 is connected to the discharge port 12 through an installation pipe, and the outlet of the circulation pump 29 is connected to the inclined guide channel 27 through an installation pipe.

[0061] A helical rod 30 and a transmission component are installed inside the inclined guide 27. The transmission component drives the helical rod 30 to rotate. The helical rod 30 is inclined upward. Helical blades are provided on the helical rod 30.

[0062] A connecting part is provided in the liquid storage tank 28, and a fixing plate 31 is provided in the inclined guide channel 27; the top end of the spiral rod 30 is connected to the connecting part through a connecting bearing, and the rod body is spirally connected to the fixing plate 31.

[0063] A second circulation pump 32 is installed outside the feed inlet 11. The inlet of the second circulation pump 32 is connected to the feed inlet 11 through an installation pipe, and the outlet of the second circulation pump 32 is connected to the liquid storage tank 28 through an installation pipe, and the pipe extends to the bottom of the liquid storage tank 28.

[0064] like Figure 6 As shown, a pressure relief channel 32 is provided at the bottom of the inclined guide channel 27. One end of the pressure relief channel 32 is connected to the inclined guide channel 27, and the other end is connected to the liquid storage tank 28.

[0065] The transmission components include a drive wheel 33 and a driven wheel 34. A pusher motor 35 is coaxially mounted on the drive wheel 33, and the pusher motor 35 is detachably installed in the bottom box 26 and located above the fixed plate 31. The drive wheel 33 and the driven wheel 34 are connected by a transmission belt 36.

[0066] like Figure 8 and Figure 9 As shown, the transmission mechanism includes a large diameter gear 37, the bottom of which is coaxially mounted with the upper shaft 3, and a small diameter gear 38 meshing with the large diameter gear 37; and an upper motor 39 is mounted on the top extended support frame 2, the output end of which is coaxially connected with the small diameter gear 38; and multiple sets of small diameter gears 38 are provided.

[0067] The grinding method of tungsten concentrate using an ultrafine grinding mill includes the following steps:

[0068] Step 1: Pour the slurry into the storage tank 28 and turn on the circulation pump 32; pump the slurry to the feed inlet 11;

[0069] Step 2: The slurry enters the feed inlet 11, part of which enters between the hinged grinding plate 6 and the side grinding plate 4, and part of which splashes onto the inclined plate 5 and falls back to the space between the hinged grinding plate 6 and the side grinding plate 4 with the inclined pull groove.

[0070] Step 3: The drive motor starts the rotating disk 15 to rotate, which continuously drives the connecting rod 18 to drive the hinged grinding plate 6 to rotate and reciprocate towards the lateral grinding plate 4.

[0071] Step 4: The upper motor 39 drives the small diameter gear 38 to rotate the large diameter gear 37, and multiple sets of small diameter gears 38 rotate synchronously in the same direction; it drives the upper shaft 3 located at the bottom of the large diameter gear 37, and the upper shaft 3 drives the flexible shaft 21 to rotate within the fixed ring 20. The upper and lower ends of the flexible shaft 21 are connected to the closed cylinder 24 through the mounting position bearing, and the bottom is fixedly connected to the upper grinding plate 7. The upper grinding plate 7 is fixed by the inner ring of the slewing bearing 23, and the outer ring of the slewing bearing 23 is fixed to the upper support shell 22.

[0072] Step 5: The inclined lower grinding plate 8 allows the slurry, which has been ground between the upper grinding plate 7 and the lower grinding plate 8, to enter the lower liquid hole 25.

[0073] Step 6: The lower shaft 9 drives the spiral blades to stir the grinding balls 10 to achieve abrasive processing;

[0074] Step 7: The circulating pump 29 operates, driving the slurry into the bottom tank 26 and driving the pusher motor 35 to operate; driving the drive wheel 33, which drives the driven wheel 34 through the transmission belt 36, and causing the screw rod 30 to rotate; driving the slurry into the storage tank 28.

[0075] Step 8: The slurry located at the bottom of the inclined guide channel 27 is discharged to the storage tank 28 through the pressure relief channel 32;

[0076] Step 9: A sampling rod 40 is installed outside the liquid storage tank 28. The sampling rod 40 is suitable for sampling the slurry to detect the particle size. If the particle size does not meet the standard, repeat steps 1-8 and repeat the grinding.

Claims

1. A tungsten concentrate ultrafine grinding mill, characterized in that, It includes a vertical cylinder (1), a transmission mechanism and a support frame (2). The support frame (2) is installed on the top of the vertical cylinder (1), and an upper shaft (3) is installed inside the vertical cylinder (1). The transmission mechanism is located at the top of the vertical cylinder (1) and is suitable for driving the upper shaft (3) to rotate. Inside the vertical cylinder (1), side grinding components, middle grinding components, and bottom grinding components are installed from top to bottom respectively; The side grinding component includes a side grinding plate (4) and an inclined plate (5); the side grinding plate (4) is fixedly installed on the inner wall of the vertical cylinder (1), and a hinged grinding plate (6) is hingedly installed under the inclined plate (5); both the hinged grinding plate (6) and the side grinding plate (4) are provided with a sanding surface on opposite sides; an adjustment component is installed on the back side of the hinged grinding plate (6), and the adjustment component is suitable for adjusting the angle position of the hinged grinding plate (6) under the inclined plate (5); The grinding component includes an upper grinding plate (7) and a lower grinding plate (8), with grinding teeth provided between the upper grinding plate (7) and the lower grinding plate (8); the upper shaft (3) drives the upper grinding plate (7) to rotate; The bottom grinding component includes a lower shaft (9), and the lower shaft (9) is surrounded by multiple sets of grinding balls (10). A feed inlet (11) is installed on the upper side of the vertical cylinder (1), and a discharge port (12) is installed at the bottom; a bottom motor (13) is installed at the bottom of the vertical cylinder (1), and the output shaft of the bottom motor (13) is axially upward and coaxially connected to the lower shaft (9).

2. The tungsten concentrate ultrafine grinding mill according to claim 1, characterized in that, The inclined plate (5) is tilted downward toward the feed inlet (11); and a hinged grinding plate (6) and a side plate (14) are installed at the bottom of the inclined plate (5). The side plate (14) is fixedly installed at the bottom of the inclined plate (5) and located on both sides of the hinged grinding plate (6); the upper shaft (3) passes through the inclined plate (5), and a slanted groove is also installed on the inclined plate (5).

3. The tungsten concentrate ultrafine grinding mill according to claim 2, characterized in that, Includes a rotating disk (15), on which a drive shaft (16) is mounted, the end of which extends into a vertical cylinder (1) and is fitted with a drive motor; the drive motor is adapted to drive the rotating disk (15) to rotate; a connecting rod (18) is mounted on the rotating disk (15), one end of which is eccentrically hinged to the rotating disk (15), and the other end is hinged to the side of the hinged grinding plate (6) opposite to the side grinding plate (4).

4. The tungsten concentrate ultrafine grinding mill according to claim 3, characterized in that, A fixing frame (19) is installed inside the vertical cylinder (1). The two ends of the fixing frame (19) are fixedly connected to the inner wall of the vertical cylinder (1), and a fixing ring (20) is adopted in the middle. The fixing ring (20) is coaxially connected to the upper shaft (3). A flexible shaft (21) is installed at the bottom, and the upper end of the flexible shaft (21) is fixedly connected to the upper shaft (3). An upper support shell (22) is installed outside the upper grinding plate (7). The upper grinding plate (7) is installed in the upper support shell (22) by installing a slewing bearing (23). A closed cylinder (24) is installed outside the flexible shaft (21), and the two ends of the closed cylinder (24) are fixedly connected to the upper support shell (22) and the fixed ring (20) respectively.

5. The tungsten concentrate ultrafine grinding mill according to claim 4, characterized in that, The upper grinding plate (7) and the upper support shell (22) are both inclined; the upper grinding plate (7) and the lower grinding plate (8) are both inclined from one side of the feed inlet (11) to the other side.

6. The tungsten concentrate ultrafine grinding mill according to claim 5, characterized in that, The lower grinding plate (8) is fixedly installed inside the vertical cylinder (1), and a liquid outlet (25) is provided at one end away from the feed inlet (11). The liquid outlet (25) is suitable for connecting the intermediate grinding component and the bottom grinding component. The lower shaft (9) is equipped with a stirring spiral blade.

7. The tungsten concentrate ultrafine grinding mill according to claim 6, characterized in that, A bottom box (26) is installed at the bottom of the vertical cylinder (1). An inclined guide channel (27) and a liquid storage tank (28) are installed inside the bottom box (26). A circulation pump (29) is installed outside the discharge port (12). The inlet of the circulation pump (29) is connected to the discharge port (12) through an installation pipe. The outlet of the circulation pump (29) is connected to the inclined guide channel (27) through an installation pipe. A helical rod (30) and a transmission component are installed in the inclined guide (27). The transmission component drives the helical rod (30) to rotate. The helical rod (30) is inclined upward. Helical blades are provided on the helical rod (30). A connecting part is provided in the liquid storage tank (28), and a fixing plate (31) is provided in the inclined guide channel (27); the top end of the spiral rod (30) is connected to the connecting part through a connecting bearing, and the rod body is spirally connected to the fixing plate (31); A second circulation pump (32) is installed outside the feed inlet (11). The second circulation pump (32) is connected to the feed inlet (11) through an installation pipe. The second circulation pump (32) is connected to the liquid storage tank (28) through an installation pipe, and the pipe extends to the bottom of the liquid storage tank (28).

8. The tungsten concentrate ultrafine grinding mill according to claim 7, characterized in that, The bottom of the inclined guide channel (27) is provided with a pressure relief channel, one end of which is connected to the inclined guide channel (27); the other end is connected to the liquid storage tank (28). The transmission components include a drive wheel (33) and a driven wheel (34). A pusher motor (35) is coaxially mounted on the drive wheel (33), and the pusher motor (35) is detachably installed in the bottom box (26) and located above the fixed plate (31). The drive wheel (33) and the driven wheel (34) are connected by a transmission belt (36).

9. The tungsten concentrate ultrafine grinding mill according to claim 8, characterized in that, The transmission mechanism includes a large diameter gear (37), the bottom of which is coaxially mounted with the upper shaft (3), and a small diameter gear (38) meshes with the large diameter gear (37); an upper motor (39) is mounted on the support frame (2), and the output end of the upper motor (39) is coaxially connected with the small diameter gear (38); and multiple sets of small diameter gears (38) are provided.

10. A grinding method for tungsten concentrate using an ultrafine grinding mill as described in claim 9, characterized in that, Includes the following steps: Step 1: Pour the slurry into the storage tank (28) and turn on the second circulation pump (32); pump the slurry to the feed inlet (11). Step 2: The slurry enters the feed inlet (11), part of which enters between the hinged grinding plate (6) and the side grinding plate (4), and part splashes onto the inclined plate (5), and falls back to between the hinged grinding plate (6) and the side grinding plate (4) with the inclined pull groove; Step 3: Drive the motor to start the rotating disk (15) to rotate, and continuously drive the connecting rod (18) to drive the hinged grinding plate (6) to rotate, and reciprocate towards the lateral grinding plate (4); Step 4: The upper motor (39) drives the small diameter gear (38) to drive the large diameter gear (37) to rotate, and multiple sets of small diameter gears (38) rotate synchronously in the same direction; it drives the upper shaft (3) located at the bottom of the large diameter gear (37), and the upper shaft (3) drives the flexible shaft (21) to rotate in the fixed ring (20). The upper and lower ends of the flexible shaft (21) are connected in the closed cylinder (24) through the mounting position bearing, and the bottom is fixedly connected to the upper grinding plate (7). The upper grinding plate (7) is fixed by the inner ring of the slewing bearing (23), and the outer ring of the slewing bearing (23) is fixed to the upper support shell (22). Step 5: The inclined lower grinding plate (8) allows the slurry to enter the lower liquid hole (25) after being ground between the upper grinding plate (7) and the lower grinding plate (8). Step 6: The grinding material is abraded by driving the stirring spiral blades (10) through the lower shaft (9); Step 7: Circulation pump 1 (29) operates, driving the slurry into the bottom tank (26) and driving the pusher motor (35) to operate; driving the drive wheel (33), which drives the driven wheel (34) through the transmission belt (36), and causing the screw rod (30) to rotate; driving the slurry into the storage tank (28); Step 8: The slurry located at the bottom of the inclined guide channel (27) is discharged to the storage tank (28) through the pressure relief channel. Step 9: A sampling rod (40) is installed outside the liquid storage tank (28). The sampling rod (40) is suitable for sampling the slurry to detect the particle size. If the particle size does not meet the standard, repeat steps 1-8 and repeat the grinding.

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