A high-efficiency energy-saving continuous ball mill and a control method thereof

Abstract

The application discloses a kind of high-efficiency energy-saving continuous ball mill and control method thereof, including frame body, grinding cylinder, feed hole, discharge hole, pulp feeding assembly, pulp discharging exhaust assembly and driving assembly, frame body is rotationally provided with grinding cylinder, the inside of grinding cylinder is provided with grinding medium, the two sides of grinding cylinder are provided with feed hole and discharge hole respectively, pulp feeding assembly is provided in feed hole, pulp feeding assembly is communicated with the inside of grinding cylinder, the inside of discharge hole is provided with pulp discharging exhaust assembly, pulp discharging exhaust assembly is communicated with the top space of grinding cylinder, driving assembly is also provided on frame body;By pulp discharging exhaust assembly, exhaust can be carried out simultaneously with pulp discharging, simultaneously reduce the gas pressure in grinding cylinder, to ensure that the liquid level pressure of internal slurry is always in stable state, and it is convenient to carry out pulp discharging and pulp feeding simultaneously, realize continuous grinding, and the liquid level in grinding cylinder can be higher than center pulp discharging pipe, improve the space utilization of grinding cylinder.

Description

Technical Field

[0001] This invention relates to the field of ball mill technology, specifically to a high-efficiency and energy-saving continuous ball mill and its control method. Background Technology

[0002] Ball mills are widely used in raw material workshops in industries such as ceramics, glass, and chemicals. Their principle is to crush and mix materials by utilizing the impact of grinding media and the grinding action between the grinding media during rotation. They can be used in the ceramics industry to grind and mix ceramic raw materials of various hardnesses, and can also be used for fine grinding and mixing of materials in the construction and chemical industries. Ball mills in the ceramics industry are divided into intermittent ball mills and continuous ball mills. However, intermittent ball mills have disadvantages such as long grinding cycles, discontinuous feeding and discharging, low output, and large space occupation.

[0003] In the ceramics industry, ball mills are generally continuous ball mills for grinding. Continuous ball mills can continuously feed and discharge materials, thereby improving work efficiency. However, the slurry level in existing continuous ball mills is generally located in the lower half. When the slurry level is higher than the central discharge pipe, a large amount of gas generated by the heat of the ball mill cannot be discharged and will occupy a large amount of space inside the ball mill. When the gas pressure is greater than the slurry level pressure in the external slurry tank, it will also cause the slurry to be unable to enter the ball mill cylinder for grinding, resulting in a decrease in the slurry level in the cylinder and low space utilization inside the grinding cylinder.

[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a high-efficiency and energy-saving continuous ball mill and its control method, which aims to solve the problem of low utilization rate of grinding space inside the existing continuous ball mill cylinder.

[0006] The technical solution adopted by this invention to solve the technical problem is as follows:

[0007] A high-efficiency and energy-saving continuous ball mill includes a frame and a grinding cylinder rotatably mounted on the frame. The grinding cylinder contains grinding media. The mill also includes:

[0008] The feed port and the discharge port are respectively located on both sides of the grinding cylinder;

[0009] The slurry feeding assembly is disposed inside the feed hole and communicates with the interior of the grinding cylinder to inject slurry into the grinding cylinder;

[0010] The slurry discharge and venting assembly is located inside the discharge hole and communicates with the top space of the grinding cylinder to discharge the slurry and gas inside the grinding cylinder.

[0011] A drive assembly is mounted on the frame; the drive assembly is connected to the grinding cylinder to drive the grinding cylinder to rotate.

[0012] Furthermore, the slurry discharge and venting assembly includes:

[0013] A slurry outlet valve is disposed inside the grinding cylinder; the slurry outlet valve is sealed to the inner wall of the grinding cylinder.

[0014] Multiple first sector-shaped cavities are radially arranged inside the slurry outlet valve, and each first sector-shaped cavity has an opening on the side near the feed hole;

[0015] The first gas-liquid distribution rotary joint has one end connected to multiple first sector-shaped cavities and the other end connected to an external slurry outlet pipe, so as to seal the first sector-shaped cavities located in the middle and bottom of the grinding cylinder, and connect the first sector-shaped cavities located at the top of the grinding cylinder to the slurry outlet pipe for slurry discharge and exhaust.

[0016] Furthermore, the first gas-liquid distribution rotary joint includes:

[0017] The first gas-liquid rotary distribution pipe is rotatably installed inside the discharge hole;

[0018] Multiple first conveying pipes are arranged radially inside the first gas-liquid rotary distribution pipe; each of the first conveying pipes corresponds to and is connected to the first sector-shaped cavity;

[0019] The first gas-liquid static distribution pipe is disposed on one side of the first gas-liquid rotary distribution pipe;

[0020] A first baffle is disposed on the side of the first gas-liquid static distribution pipe close to the first gas-liquid rotary distribution pipe; a first through hole is provided on the top of the first baffle, and the first through hole cooperates with the first conveying pipe in the first gas-liquid rotary distribution pipe to discharge the slurry in the first fan-shaped cavity and the gas in the grinding cylinder.

[0021] Furthermore, the center of the slurry outlet valve is provided with a slot, the first gas-liquid rotary distribution pipe is disposed in the slot, and the first conveying pipe in the first gas-liquid rotary distribution pipe is connected to the first sector cavity through a connecting pipe.

[0022] Furthermore, the slurry feeding assembly includes:

[0023] A slurry pump is located on the outside of the grinding cylinder;

[0024] A slurry inlet tank is located on the outside of the grinding cylinder; the slurry inlet tank is connected to the slurry supply pump via a pipeline; a level gauge is installed inside the slurry inlet tank;

[0025] The slurry inlet valve is located inside the grinding cylinder. The slurry inlet valve has multiple second sector-shaped cavities arranged radially inside. The slurry inlet valve is connected to the slurry inlet tank through a second gas-liquid distribution rotary joint to seal the second sector-shaped cavities located at the top and middle of the grinding cylinder to the slurry inlet tank, and to connect the second sector-shaped cavities located at the bottom of the grinding cylinder to the slurry inlet tank for slurry injection.

[0026] Furthermore, the second gas-liquid distribution rotary joint includes:

[0027] The second gas-liquid rotary distribution pipe is disposed inside the feed hole;

[0028] Multiple second conveying pipes are arranged radially inside the second gas-liquid rotary distribution pipe; each of the second conveying pipes corresponds to and is connected to the second sector-shaped cavity.

[0029] The second gas-liquid static distribution pipe is disposed on one side of the second gas-liquid rotary distribution pipe;

[0030] The second baffle is disposed on the side of the second gas-liquid static distribution pipe near the second gas-liquid rotary distribution pipe; the bottom of the second baffle is provided with a second through hole, which cooperates with the second conveying pipe inside the second gas-liquid rotary distribution pipe to inject slurry into the bottom of the grinding cylinder.

[0031] Furthermore, the driving component includes:

[0032] A drive motor is mounted on the frame.

[0033] A speed reducer is mounted on the frame; the speed reducer cooperates with the drive motor;

[0034] The transmission belt has one end fitted onto the output shaft of the reducer and the other end fitted onto the grinding cylinder.

[0035] Furthermore, a throttling valve is installed inside the first gas-liquid static distribution pipe.

[0036] Furthermore, an overflow pipe is provided on one side of the slurry inlet tank.

[0037] A control method for a continuous ball mill, based on the high-efficiency and energy-saving continuous ball mill described above, includes the following steps:

[0038] Place the grinding media into the grinding cylinder;

[0039] Slurry is continuously injected into the grinding cylinder through the slurry inlet assembly, and the drive assembly is activated;

[0040] After rotating for a preset time, the pulp discharge and exhaust assembly is opened to achieve synchronous operation of pulp inlet, pulp outlet, and exhaust.

[0041] Compared with the prior art, the beneficial effects of the present invention are:

[0042] In this invention, a grinding cylinder is rotatably mounted on a frame. The grinding cylinder contains grinding media. An inlet and an outlet are located on opposite sides of the grinding cylinder. An inlet assembly is installed in the inlet, communicating with the interior of the grinding cylinder. An outlet assembly is installed in the outlet, communicating with the top space of the grinding cylinder. A drive assembly is also mounted on the frame to drive the grinding cylinder to rotate. Slurry is injected into the grinding cylinder through the inlet assembly, and the drive assembly rotates the grinding cylinder for grinding. During grinding, the outlet assembly discharges slurry and exhausts gas, while simultaneously opening the inlet assembly to feed slurry, enabling continuous grinding. The outlet assembly allows for simultaneous venting, reducing the gas pressure inside the grinding cylinder and ensuring a stable slurry level. It also facilitates simultaneous slurry feeding and discharging, enabling continuous grinding and ensuring the liquid level inside the grinding cylinder is higher than the central outlet pipe, thus improving the space utilization of the grinding cylinder. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0044] Figure 2 This is a schematic diagram of the slurry feeding assembly structure of the present invention.

[0045] Figure 3 This is a schematic diagram of the second gas-liquid distribution rotary joint structure of the present invention.

[0046] Figure 4 This is a schematic diagram of the slurry discharge and exhaust assembly structure of the present invention.

[0047] Figure 5 This is a schematic diagram of the first gas-liquid distribution rotary joint structure of the present invention.

[0048] Figure 6 This is a schematic diagram of the slurry inlet tank structure of the present invention.

[0049] Figure 7 The flowchart below shows the continuous ball mill control method of the present invention.

[0050] The numbers in the diagram represent: 1. Frame; 2. Grinding cylinder; 21. Feed port; 22. Discharge port; 23. Grinding media; 3. Slurry feeding assembly; 31. Slurry pump; 32. Slurry tank; 33. Slurry valve; 34. Second sector-shaped cavity; 35. Second gas-liquid distribution rotary joint; 351. Second gas-liquid rotary distribution pipe; 352. Second conveying pipe; 353. Second gas-liquid static distribution pipe; 354. Second baffle; 355. Second through hole; 36. 37. Level gauge; 4. Inlet; 5. Slurry discharge and exhaust assembly; 6. Slurry discharge valve; 7. First sector-shaped cavity; 8. First gas-liquid distribution rotary joint; 9. First gas-liquid rotary distribution pipe; 10. First conveying pipe; 11. First gas-liquid static distribution pipe; 12. First baffle; 23. First through hole; 44. Opening; 5. Drive assembly; 6. Drive motor; 7. Reducer; 8. Drive belt; 9. Throttle valve; 10. Overflow pipe. Detailed Implementation

[0051] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0052] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0053] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0054] In view of the shortcomings of the prior art, this embodiment provides a high-efficiency and energy-saving continuous ball mill and its control method, which can be referred to as follows:

[0055] As attached Figure 1 Appendix Figure 2 and attached Figure 4 As shown, a high-efficiency and energy-saving continuous ball mill includes a frame 1, a grinding cylinder 2, a feed port 21, a discharge port 22, a slurry feeding assembly 3, a slurry discharge and venting assembly 4, and a drive assembly 5. Rotary bearings are provided on both sides of the frame 1. Grinding media 23 are disposed inside the grinding cylinder 2, and convex shafts are provided on both sides of the grinding cylinder 2. The two convex shafts are rotatably mounted within the rotary bearings, and the feed port 21 and discharge port 22 are respectively disposed inside the two convex shafts. The slurry feeding assembly 3 is disposed inside the feed port 21, and the slurry feeding assembly 3 is sealed to the feed port 21 and communicates with the interior of the grinding cylinder 2. The slurry inlet assembly 3 can inject slurry into the interior of the grinding cylinder 2; the discharge port 22 is equipped with a slurry outlet venting assembly 4, which is sealed to the discharge port 22 and communicates with the top space of the grinding cylinder 2 to discharge the slurry and gas inside the grinding cylinder 2, thereby ensuring the liquid level pressure inside the grinding cylinder 2; the frame 1 is also equipped with a drive assembly 5, which is connected to the grinding cylinder 2 to drive the grinding cylinder 2 to rotate in the rotating bearing. The grinding medium 23 inside the grinding cylinder 2 grinds the injected slurry and discharges it through the slurry outlet venting assembly 4;

[0056] Slurry can be injected into the grinding cylinder 2 through the slurry inlet assembly 3, and the grinding cylinder 2 is driven to rotate by the drive assembly 5 for grinding. During the grinding process, slurry is discharged and gas is discharged through the slurry outlet and exhaust assembly 4 to ensure that the liquid level and pressure of the internal slurry are always stable, and to facilitate simultaneous slurry discharge and inlet, so as to achieve continuous grinding. Through the slurry outlet and exhaust assembly 4, the gas generated in the grinding cylinder 2 during grinding can also be discharged from the top of the grinding cylinder 2, so that the liquid level in the grinding cylinder 2 is higher than the central slurry outlet pipe, thereby improving the space utilization of the grinding cylinder 2.

[0057] As attached Figure 4 and attached Figure 5As shown, the slurry discharge and venting assembly 4 includes a slurry discharge valve 41, multiple first sector-shaped cavities 42, and a first gas-liquid distribution rotary joint 43. The slurry discharge valve 41 is disc-shaped, and its outer wall abuts against the inner wall of the grinding cylinder 2, forming a sealed fit to prevent slurry from flowing out from the gap between the slurry discharge valve 41 and the grinding cylinder 2. Multiple first sector-shaped cavities 42 are arranged inside the slurry discharge valve 41, sequentially arranged along the circumference of the slurry discharge valve 41, and coaxially arranged. An opening 44 is provided on the side of each first sector-shaped cavity 42 near the feed hole 21, and the opening 44 is located close to the slurry discharge valve 41. The outer circular sidewall of the grinding cylinder 2 has an opening 44 through which the slurry inside the grinding cylinder 2 can enter the fan-shaped cavity and rotate as the grinding cylinder 2 rotates. The grinding cylinder 2 is also equipped with a first gas-liquid distribution rotary joint 43, which is located inside the discharge hole 22. One end of the first gas-liquid distribution rotary joint 43 is connected to multiple first fan-shaped cavities 42, and the other end is connected to the external slurry discharge pipe. The first gas-liquid distribution rotary joint 43 can close the first fan-shaped cavities 42 located in the middle and bottom of the grinding cylinder 2. The first fan-shaped cavity 42 located at the top of the grinding cylinder 2 is connected to the slurry discharge pipe for slurry discharge and air venting.

[0058] Specifically, the discharge valve 41 has multiple first sector-shaped cavities 42 inside. These cavities rotate with the grinding cylinder 2. Initially, the slurry level inside the grinding cylinder 2 is higher than the central discharge hole 22, occupying 60%-80% of the internal space. At this time, the first sector-shaped cavities 42 located below the slurry level (the openings 44 of these cavities are also below the slurry level) are filled with slurry. Since the bottom and middle first sector-shaped cavities 42 are sealed, they cannot discharge slurry through the discharge pipe. However, the top first sector-shaped cavity 42 is connected to the discharge pipe and can discharge gas. Initially, this first sector-shaped... The cavity 42 may be empty of slurry, only for venting gas. As the grinding cylinder 2 rotates, the first sector-shaped cavity 42 located in the middle will move to the top of the grinding cylinder 2. At this time, the first sector-shaped cavity 42 at the top is connected to the slurry outlet pipe, and the slurry and the gas at the top of the grinding cylinder 2 are discharged through the slurry outlet pipe, achieving the functions of venting and discharging slurry. This not only ensures the liquid level and pressure inside the grinding cylinder 2, but also allows for simultaneous slurry feeding and discharging while maintaining a constant liquid level, effectively improving the space utilization of the grinding cylinder 2. Moreover, it only discharges the slurry that has been ground at the bottom of the grinding cylinder 2, improving the quality of the slurry discharged from the grinding cylinder 2. At the same time, it is more efficient and energy-saving compared to the continuous grinding machines in the prior art.

[0059] In this embodiment, as shown in the appendix Figure 5As shown, the first gas-liquid distribution rotary joint 43 includes a first gas-liquid rotary distribution pipe 431, multiple first conveying pipes 432, a first gas-liquid static distribution pipe 433, and a first baffle 434. The first gas-liquid rotary distribution pipe 431 is rotatably disposed within the discharge hole 22. One end of the first gas-liquid rotary distribution pipe 431 is connected to the slurry discharge valve 41 and rotates with the rotation of the slurry discharge valve 41. Multiple first conveying pipes 432 are radially arranged inside the first gas-liquid rotary distribution pipe 431. The multiple first conveying pipes 432 correspond one-to-one with multiple first sector-shaped cavities 42 and are interconnected, that is, the slurry in the first sector-shaped cavity 42 can be conveyed to the first conveying pipe 432. The connecting line between the first conveying pipe 432 and the corresponding first sector-shaped cavity 42 passes through the first gas-liquid rotary distribution pipe 434. The first gas-liquid static distribution pipe 433 is provided on the side of the first gas-liquid rotary distribution pipe 431 away from the slurry outlet valve 41. The first gas-liquid static distribution pipe 433 is connected to the slurry outlet pipe and is in a fixed state. The first gas-liquid rotary distribution pipe 431 rotates relative to the first gas-liquid static distribution pipe 433. A first baffle 434 is provided on the side of the first gas-liquid static distribution pipe 433 close to the first gas-liquid rotary distribution pipe 431. The first baffle 434 closes the inlet of the first gas-liquid static distribution pipe 433, and a first through hole 435 is provided on the top of the first baffle 434. The first through hole 435 cooperates with the first conveying pipe 432 in the first gas-liquid rotary distribution pipe 431 to discharge the slurry in the first fan-shaped cavity 42 and the gas in the grinding cylinder 2.

[0060] Specifically, in the initial state, the first through hole 435 is connected to multiple first conveying pipes 432 at the top of the first gas-liquid rotary distribution pipe 431. That is, the first gas-liquid static distribution pipe 433 is connected to the space at the top of the grinding cylinder 2 through the first conveying pipes 432. The first baffle 434 closes the first conveying pipes 432 in the middle and bottom of the first gas-liquid rotary distribution pipe 431 to prevent the slurry below the liquid level in the grinding cylinder 2 from being discharged through the first fan-shaped cavity 42 and the first conveying pipes 432, and also to prevent the gas from being unable to escape. By connecting the first through hole 435 to the first conveying pipe 432 at the top of the first gas-liquid rotary distribution pipe 431, the first fan-shaped cavity 42 located at the bottom and middle of the grinding cylinder 2 can be rotated to the top under the rotation of the grinding cylinder 2. It can also be connected to the first gas-liquid static distribution pipe 433 and the slurry outlet pipe through the first conveying pipe 432 and the first through hole 435, so as to simultaneously discharge slurry and gas, thereby ensuring that the liquid level and pressure of the internal slurry are always stable, facilitating simultaneous slurry discharge and slurry inlet, and realizing continuous grinding.

[0061] In this embodiment, a slot is provided in the center of the slurry outlet valve 41, and one end of the first gas-liquid rotary distribution pipe 431 is disposed in the slot. The first gas-liquid rotary distribution pipe 431 and the slurry outlet valve 41 are in a sealed state. The first conveying pipe 432 in the first gas-liquid rotary distribution pipe 431 is connected to the first sector cavity 42 through a connecting pipe. The first sector cavity 42 located at the top of the grinding cylinder 2 is located at the top of the first conveying pipe 432, so that the slurry in the first sector cavity 42 can flow more conveniently into the first conveying pipe 432, and the efficiency of slurry discharge and degassing can be accelerated more efficiently.

[0062] In this embodiment, the first through hole 435 is an arc-shaped hole, which can be connected to multiple first conveying pipes 432 to accelerate the efficiency of slurry discharge and exhaust.

[0063] Further details are attached. Figure 5 As shown, there are five first sector-shaped cavities 42, and two openings 44 can be provided on one side of each first sector-shaped cavity 42 to facilitate slurry discharge and venting. There are also five first conveying pipes 432, and the first sector-shaped cavities 42 and the first conveying pipes 432 correspond one-to-one. In the initial state, there are two first sector-shaped cavities 42 located at the top of the grinding cylinder 2. The two first conveying pipes 432 corresponding to the two first sector-shaped cavities 42 correspond to the first through holes 435 and are connected to the first gas-liquid static distribution pipe 433. As the grinding cylinder 2 rotates, the first sector-shaped cavity 42 containing the slurry is discharged. A sector-shaped cavity 42 rotates from the middle or bottom to the top. After the corresponding first conveying pipe 432 is connected to the first through hole 435, the slurry in the first sector-shaped cavity 42 flows into the first conveying pipe 432 and then into the gas-liquid static distribution pipe, while simultaneously venting the gas. Through the continuous rotation of the grinding cylinder 2, the first sector-shaped cavity 42 continuously cooperates with the first conveying pipe 432 and the first through hole 435 to discharge slurry and vent the gas, achieving continuous slurry discharge. At the same time, the gas generated by the high temperature is also discharged, which facilitates the injection of slurry by the slurry feeding component 3.

[0064] Further details are attached. Figure 4 As shown, a throttle valve 6 is installed inside the first gas-liquid static distribution pipe 433. The throttle valve 6 is used to control the connection and closure between the first gas-liquid static distribution pipe 433 and the slurry outlet pipe. When the slurry is just injected into the grinding cylinder 2, the throttle valve 6 is in the closed state. The grinding cylinder 2 is started to grind the slurry. After a certain period of time, the throttle valve 6 can be opened to discharge the ground slurry and the gas generated during the grinding process.

[0065] As attached Figure 2 Appendix Figure 3 and attached Figure 6As shown, the slurry feeding assembly 3 includes a slurry pump 31, a slurry feeding tank 32, a slurry feeding valve 33, and a second gas-liquid distribution rotary joint 35. The slurry pump 31 and the slurry feeding tank 32 are located outside the grinding cylinder 2. The slurry pump 31 is connected to the external slurry and is connected to the slurry feeding tank 32 through a pipeline. By starting the slurry pump 31, slurry is injected into the slurry feeding tank 32. The slurry feeding tank 32 injects slurry into the grinding cylinder 2 through the second gas-liquid distribution rotary joint 35 and the slurry feeding valve 33. At the same time, a level gauge 36 is installed inside the slurry feeding tank 32. Since the slurry in the slurry feeding tank 32 is connected to the slurry in the grinding cylinder 2, the level height in the grinding cylinder 2 can be viewed through the level gauge 36 in the slurry feeding tank 32, thereby avoiding the level in the grinding cylinder 2 being too high or too low.

[0066] In this embodiment, the level gauge 36 is existing technology. The level gauge 36 is also used to send a signal to the PLC in the continuous ball mill. The PLC sends a signal to the slurry pump 31, and the slurry pump 31 adjusts the slurry flow rate inside it. When the level gauge 36 detects that the liquid level in the grinding cylinder 2 is at a high level (the value of the high level can be set manually), it sends a signal to the PLC. The PLC sends a signal to the slurry pump 31, and the slurry pump 31 reduces its internal flow rate and slowly injects slurry into the grinding cylinder 2 to keep the slurry inflow and outflow rates consistent.

[0067] In this embodiment, the inside of the slurry inlet valve 33 is provided with a plurality of second sector-shaped cavities 34 arranged radially. The slurry inlet valve 33 has the same structure as the slurry outlet valve 41. The second gas-liquid distribution rotary joint 35 can seal the second sector-shaped cavities 34 located at the top and middle of the grinding cylinder 2 with the slurry inlet tank 32, and connect the second sector-shaped cavities 34 located at the bottom of the grinding cylinder 2 with the slurry inlet tank 32. That is, the slurry inlet tank 32 will not inject slurry through the second sector-shaped cavities 34 located at the top and middle of the grinding cylinder 2, but will inject slurry through the second sector-shaped cavities 34 located at the bottom of the grinding cylinder 2. An injection port 37 is provided on one side of the second sector-shaped cavity 34. The injection port 37 is close to the outer edge of the slurry inlet valve 33, so that when injecting slurry, it is slowly injected from the bottom of the grinding cylinder 2.

[0068] By sealing the second sector-shaped cavity 34 located at the top and middle of the grinding cylinder 2, the gas inside the grinding cylinder 2 can only flow in one direction. The unidirectionally flowing gas will also flush the inner wall of the first sector-shaped cavity 42 and the first conveying pipe 432 under a certain pressure, thus preventing slurry sedimentation. At the same time, it prevents the gas generated inside the grinding cylinder 2 from entering the channel connecting the slurry tank 32 and the slurry valve 33 through the injection port 37 of the second sector-shaped cavity 34 located at the top or middle, thereby affecting the slurry injection rate and stability of the slurry tank 32.

[0069] In this embodiment, as shown in the appendix Figure 3As shown, the second gas-liquid distribution rotary joint 35 includes a second gas-liquid rotary distribution pipe 351, multiple second conveying pipes 352, a second gas-liquid static distribution pipe 353, and a second baffle 354. The second gas-liquid rotary distribution pipe 351 is disposed inside the feed hole 21 and is connected to the slurry inlet valve 33. Multiple second conveying pipes 352 are radially arranged inside the second gas-liquid rotary distribution pipe 351. The multiple second conveying pipes 352 correspond one-to-one with and are connected to multiple second sector-shaped cavities 34. A second gas-liquid static distribution pipe 353 is provided on one side of the liquid rotary distribution pipe 351. The second gas-liquid rotary distribution pipe 351 rotates relative to the second gas-liquid static distribution pipe 353. A second baffle 354 is provided on the side of the second gas-liquid static distribution pipe 353 near the second gas-liquid rotary distribution pipe 351. A second through hole 355 is provided at the bottom of the second baffle 354. The second through hole 355 cooperates with the second conveying pipe 352 inside the second gas-liquid rotary distribution pipe 351 to inject slurry into the bottom of the grinding cylinder 2.

[0070] Specifically, the slurry inlet tank 32 is connected to the second gas-liquid static distribution pipe 353, and slurry flows into the second gas-liquid static distribution pipe 353. The slurry in the second gas-liquid static distribution pipe 353 flows through the second through hole 355 to the second conveying pipe 352 connected to the second fan-shaped cavity 34 located at the bottom of the grinding cylinder 2, and flows to the bottom of the grinding cylinder 2. As the grinding cylinder 2 rotates, multiple second conveying pipes 352 are continuously connected to the second through hole 355, and slurry is injected from the bottom of the grinding cylinder 2. This prevents the gas generated in the grinding cylinder 2 from entering the second gas-liquid static distribution pipe 353 through the second fan-shaped cavity 34 located at the top or middle of the grinding cylinder 2 and the corresponding second conveying pipe 352, thus avoiding gas backflow and affecting the slurry injection rate and stability of the slurry inlet tank 32.

[0071] In this embodiment, a slot is provided at the center of the slurry inlet valve 33, and the second gas-liquid rotary distribution pipe 351 is disposed in the slot. The second gas-liquid rotary distribution pipe 351 is connected to the second sector-shaped cavity 34 on the circumferential side through a connecting pipe.

[0072] Furthermore, the second through hole 355 at the bottom of the second baffle 354 is an arc-shaped slot, and two injection ports 37 can be provided on one side of the second fan-shaped cavity 34 to accelerate the injection speed of the slurry and match the slurry discharge speed of the slurry discharge valve 41.

[0073] Furthermore, an overflow pipe 7 is provided on one side of the slurry tank 32. The overflow pipe 7 is used to overflow the slurry, thereby controlling the liquid level in the slurry tank 32 and the grinding cylinder 2, so as to avoid the slurry liquid level inside the grinding cylinder 2 being too high, which would affect the grinding and slurry discharge.

[0074] As attached Figure 1As shown, the drive assembly 5 includes a drive motor 51, a reducer 52, and a transmission belt 53. The drive motor 51 and the reducer 52 are mounted on the frame 1, and the drive motor 51 and the reducer 52 cooperate with each other. The output shaft of the reducer 52 is provided with a transmission belt 53, and the other end of the transmission belt 53 is sleeved on the grinding cylinder 2. By starting the drive motor 51 and reducing the speed through the reducer 52, the transmission belt 53 drives the grinding cylinder 2 to rotate, thereby grinding the slurry inside the grinding cylinder 2.

[0075] In one embodiment of this application, a maintenance hole is provided on the outer surface of the grinding cylinder 2, and a sealing cover is provided on the maintenance hole. The sealing cover is fixed by bolts and buckles. The maintenance hole can be used not only for manual entry into the grinding cylinder 2 for inspection and maintenance, but also for injecting grinding media 23.

[0076] As attached Figure 7 As shown, the present invention also provides a control method for a continuous ball mill, based on the above-mentioned high-efficiency and energy-saving continuous ball mill, comprising the following steps:

[0077] S100, put the grinding medium into the grinding cylinder;

[0078] A maintenance hole is provided on the outer surface of the grinding cylinder 2. This maintenance hole is not only used for manual entry into the grinding cylinder 2 for maintenance, but also for the introduction of grinding media 23.

[0079] S200, slurry is continuously injected into the grinding cylinder through the slurry inlet assembly, and the drive assembly is started;

[0080] After the grinding media 23 is added, the slurry is injected into the grinding cylinder 2 through the slurry feeding component 3 in the feed hole 21. One end of the slurry feeding component 3 is connected to the external slurry feeding equipment, and the other end is connected to the inside of the grinding cylinder 2. At the same time as the slurry is injected, the drive component 5 is also activated to grind the injected slurry. At this time, the slurry outlet and exhaust component 4 is in a closed state to prevent the undrilled slurry from being discharged.

[0081] S300, after rotating for a preset time, the slurry discharge and exhaust assembly is opened to achieve synchronous operation of slurry feeding, slurry discharge and exhaust.

[0082] Under the action of the drive component 5, the grinding cylinder 2 rotates, and after a preset time, the slurry in the grinding cylinder 2 gradually increases, and some of the slurry is ground. The ground slurry is generally located at the bottom of the grinding cylinder 2. At this time, the slurry discharge and exhaust component 4 can be opened, and the slurry located at the bottom of the grinding cylinder 2 is discharged with the slurry discharge and exhaust component 4. At the same time, the gas generated at the top of the grinding cylinder 2 is also discharged to reduce the pressure inside the grinding cylinder 2, so as to facilitate the continuous feeding of the slurry feed component 3. The slurry discharge and exhaust component 4 also continuously discharges slurry and exhausts gas, thereby realizing a continuous slurry feeding and slurry discharge process. This not only improves the space utilization rate inside the grinding cylinder 2, but also improves its grinding efficiency.

[0083] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the solutions disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

Claims

1. A high-efficiency and energy-saving continuous ball mill, comprising a frame and a grinding cylinder rotatably mounted on the frame, wherein the grinding cylinder contains grinding media, characterized in that, Also includes: The feed port and the discharge port are respectively located on both sides of the grinding cylinder; The slurry feeding assembly is disposed inside the feed hole and communicates with the interior of the grinding cylinder to inject slurry into the grinding cylinder; The slurry discharge and venting assembly is located inside the discharge hole and communicates with the top space of the grinding cylinder to discharge the slurry and gas inside the grinding cylinder. The drive assembly is mounted on the frame. The drive assembly is connected to the grinding cylinder to drive the grinding cylinder to rotate; The slurry discharge and venting assembly includes: A slurry outlet valve is disposed inside the grinding cylinder; the slurry outlet valve is sealed to the inner wall of the grinding cylinder. Multiple first sector-shaped cavities are radially arranged inside the slurry outlet valve, and each first sector-shaped cavity has an opening on the side near the feed hole; The first gas-liquid distribution rotary joint has one end connected to multiple first sector-shaped cavities and the other end connected to an external slurry outlet pipe, so as to close the first sector-shaped cavities located in the middle and bottom of the grinding cylinder, and connect the first sector-shaped cavities located at the top of the grinding cylinder to the slurry outlet pipe for slurry discharge and exhaust. The slurry feed assembly includes: A slurry pump is located on the outside of the grinding cylinder; A slurry inlet tank is located on the outside of the grinding cylinder; one end of the slurry inlet tank is connected to the slurry supply pump through a pipe, and the other end is connected to the inside of the grinding cylinder.

2. The high-efficiency and energy-saving continuous ball mill according to claim 1, characterized in that, The first gas-liquid distribution rotary joint includes: The first gas-liquid rotary distribution pipe is rotatably installed inside the discharge hole; Multiple first conveying pipes are arranged radially inside the first gas-liquid rotary distribution pipe; each of the first conveying pipes corresponds to and is connected to the first sector-shaped cavity; The first gas-liquid static distribution pipe is disposed on one side of the first gas-liquid rotary distribution pipe; A first baffle is disposed on the side of the first gas-liquid static distribution pipe close to the first gas-liquid rotary distribution pipe; a first through hole is provided on the top of the first baffle, and the first through hole cooperates with the first conveying pipe in the first gas-liquid rotary distribution pipe to discharge the slurry in the first fan-shaped cavity and the gas in the grinding cylinder.

3. The high-efficiency and energy-saving continuous ball mill according to claim 2, characterized in that, The discharge valve has a slot in the center, the first gas-liquid rotary distribution pipe is disposed in the slot, and the first conveying pipe in the first gas-liquid rotary distribution pipe is connected to the first sector cavity through a connecting pipe.

4. The high-efficiency and energy-saving continuous ball mill according to claim 1, characterized in that, The slurry feed assembly also includes: A slurry inlet valve is located inside the grinding cylinder. The slurry inlet valve has multiple second sector-shaped cavities arranged radially inside. The slurry inlet valve is connected to the slurry inlet tank through a second gas-liquid distribution rotary joint to close the second sector-shaped cavities located at the top and middle of the grinding cylinder to the slurry inlet tank, and to connect the second sector-shaped cavities located at the bottom of the grinding cylinder to the slurry inlet tank for slurry injection. The slurry inlet tank is equipped with a level gauge.

5. A high-efficiency and energy-saving continuous ball mill according to claim 4, characterized in that, The second gas-liquid distribution rotary joint includes: The second gas-liquid rotary distribution pipe is disposed inside the feed hole; Multiple second conveying pipes are arranged radially inside the second gas-liquid rotary distribution pipe; each of the second conveying pipes corresponds to and is connected to the second sector-shaped cavity. The second gas-liquid static distribution pipe is disposed on one side of the second gas-liquid rotary distribution pipe; The second baffle is disposed on the side of the second gas-liquid static distribution pipe near the second gas-liquid rotary distribution pipe; the bottom of the second baffle is provided with a second through hole, which cooperates with the second conveying pipe inside the second gas-liquid rotary distribution pipe to inject slurry into the bottom of the grinding cylinder.

6. A high-efficiency and energy-saving continuous ball mill according to claim 4, characterized in that, The driving component includes: A drive motor is mounted on the frame. A speed reducer is mounted on the frame; the speed reducer cooperates with the drive motor; The transmission belt has one end fitted onto the output shaft of the reducer and the other end fitted onto the grinding cylinder.

7. A high-efficiency and energy-saving continuous ball mill according to claim 2, characterized in that, The first gas-liquid static distribution pipe is equipped with a throttling valve.

8. A high-efficiency and energy-saving continuous ball mill according to claim 4, characterized in that, An overflow pipe is provided on one side of the slurry inlet tank.

9. A control method for a continuous ball mill, based on the high-efficiency and energy-saving continuous ball mill according to any one of claims 1-8, characterized in that, Includes the following steps: Place the grinding media into the grinding cylinder; Slurry is continuously injected into the grinding cylinder through the slurry inlet assembly, and the drive assembly is activated; After rotating for a preset time, the pulp discharge and exhaust assembly is opened to achieve synchronous operation of pulp inlet, pulp outlet, and exhaust.

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