Ball mill

Abstract

The invention belongs to the technical field of ball mills, and relates to a ball mill, comprising: a grinding assembly for grinding; the gas inlet assembly is used for inputting gas into the grinding assembly; the air inlet assembly is connected with the grinding assembly; the feeding assembly is used for inputting raw materials into the grinding assembly; the feeding assembly is connected with the air inlet assembly; the discharging assembly is used for outputting the grinding materials in the grinding assembly; the discharging assembly is connected with the grinding assembly; the dust collecting assembly is used for collecting residual particle powder in gas discharged from the discharging assembly; and the dust collecting assembly is connected with the discharging assembly. According to the ball mill provided by the invention, continuous work without shutdown is realized, the grinding efficiency is greatly improved, and the manual steps of sample transfer, cleaning and the like are also saved.

Description

Technical Field

[0001] The invention relates to the technical field of ball mills, in particular to a ball mill. Background Art

[0002] Ball mills are widely used in powder manufacturing, sample preparation and other fields. Although there are a large number of grinding balls in the current conventional ball mills, the single contact area between the balls or between the balls and the grinding tank is very small, and the grinding efficiency is relatively low. It takes several hours or even days to meet the relevant grinding requirements. At the same time, the current conventional ball mills are usually discontinuous grinding, and sample transfer, collection and cleaning are required after grinding. Sample collection and cleaning will cause dust to float, and will consume a lot of manpower, which cannot meet the needs of relevant units, so it needs to be improved. Summary of the invention

[0003] In view of this, the present invention provides a ball mill.

[0004] Specifically, the present invention is achieved through the following technical solutions:

[0005] According to a first aspect of the present invention, there is provided a ball mill, comprising:

[0006] A grinding assembly, for grinding;

[0007] An air intake assembly, used for inputting gas into the grinding assembly; the air intake assembly is connected to the grinding assembly;

[0008] A feeding component, used for feeding raw materials into the grinding component; the feeding component is connected to the air intake component;

[0009] A discharge assembly, used for discharging the abrasive in the grinding assembly; the discharge assembly is connected to the grinding assembly;

[0010] The dust collecting component is used to collect the residual particles and powder in the gas discharged from the discharging component; the dust collecting component is connected to the discharging component.

[0011] Optionally, the grinding assembly comprises: an annular cavity and grinding balls, wherein the annular cavity is connected to the air inlet assembly and the material discharge assembly respectively, and the grinding balls are arranged in the annular cavity.

[0012] Optionally, the air intake assembly includes: an air intake pipe and a high-pressure air source, wherein the first end of the air intake pipe is connected to the high-pressure air source, the second end of the air intake pipe is provided with an air intake hole, and the air intake pipe is connected to the annular cavity of the grinding assembly through the air intake hole.

[0013] Optionally, the feeding assembly includes: a feeding pipe, a feeding hole is provided at the bottom end of the feeding pipe, and the feeding pipe is connected to the air intake pipe of the air intake assembly through the feeding hole.

[0014] Optionally, the feeding component further comprises: a spiral injector, and the spiral injector is arranged in the feeding tube.

[0015] Optionally, the discharge assembly includes: a discharge pipe, a separator and a collection bin, wherein a discharge hole is provided at the first end of the discharge pipe, the discharge pipe is connected to the annular cavity of the grinding assembly through the discharge hole, the separator has a separator inlet and a separator outlet, the separator inlet is connected to the second end of the discharge pipe, the separator outlet is connected to the dust collecting assembly, and the bottom end of the separator is connected to the collection bin.

[0016] Optionally, the discharge assembly further includes: a filter screen, which is disposed in the discharge pipe and located between the discharge hole and the separator inlet.

[0017] Optionally, the dust collecting assembly includes: a dust collecting box, the dust collecting box is connected to the separator outlet of the separator of the discharging assembly, and the dust collecting box is provided with an exhaust port.

[0018] Optionally, the dust collecting assembly further includes: a dust collecting bag, and the dust collecting bag is connected to the exhaust port.

[0019] Optionally, it also includes: a vibrator, which is arranged on the discharge pipe of the discharge assembly.

[0020] The technical solution provided by the present invention brings at least the following beneficial effects:

[0021] The ball mill provided in the present application realizes continuous operation without stopping, greatly improves the grinding efficiency, and saves manual steps such as sample transfer and cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 A schematic structural diagram of a ball mill provided in an embodiment of the present application is shown;

[0025] Figure 2 A schematic structural diagram of a grinding assembly in a ball mill provided in an embodiment of the present application is shown;

[0026] Figure 3 A schematic structural diagram of an air intake assembly in a ball mill provided in an embodiment of the present application is shown;

[0027] Figure 4 A schematic structural diagram of a feeding assembly in a ball mill provided in an embodiment of the present application is shown;

[0028] Figure 5 A schematic structural diagram of a discharging assembly in a ball mill provided in an embodiment of the present application is shown;

[0029] Figure 6 A schematic top view of a separator in a ball mill provided in an embodiment of the present application is shown;

[0030] Figure 7 A schematic structural diagram of a dust collecting assembly in a ball mill provided in an embodiment of the present application is shown;

[0031] Figure 8 A schematic structural diagram of another embodiment of a ball mill provided in an embodiment of the present application is shown;

[0032] Fig. 9 A schematic structural diagram of another embodiment of a ball mill provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Figure 1 A ball mill suitable for an embodiment of the present invention is schematically shown.

[0035] Reference Figure 1-9 As shown, the present application provides a ball mill, comprising:

[0036] A grinding assembly 10, used for grinding;

[0037] An air intake assembly 20, used to input gas into the grinding assembly 10; the air intake assembly 20 is connected to the grinding assembly 10;

[0038] A feeding assembly 30 is used to input raw materials into the grinding assembly 10; the feeding assembly 30 is connected to the air intake assembly 20;

[0039] The discharging assembly 40 is used to discharge the grinding material in the grinding assembly 10; the discharging assembly 40 is connected to the grinding assembly 10;

[0040] The dust collecting assembly 50 is used to collect the residual particles and powder in the gas discharged from the discharge assembly 40 ; the dust collecting assembly 50 is connected to the discharge assembly 40 .

[0041] In the embodiment of the present application, the material to be ground enters the air intake assembly 20 from the feeding assembly 30, and the high-pressure and high-speed gas transports the material to be ground to the grinding assembly 10, and the airflow pushes the grinding balls 12 to start the grinding process. The ground material enters the discharge pipe 42 through the discharge hole 41, and if the grinding particle size can pass the filter 43 requirement, it enters the separator 44 through the separator inlet 45, otherwise it is continuously vibrated by the vibrator 60 near the filter 43, so that it returns to the annular cavity 11 to continue grinding; the gas-solid mixture entering the separator 44 is subjected to the centrifugal force, and the solid particles settle in the collection bin 47. After the gas rises at the center of the separator 44, it enters the dust collecting box 51 in the dust collecting assembly 50, and enters the atmosphere through the exhaust port 52 and the dust collecting bag 53.

[0042] Exemplarily, the grinding assembly 10 includes: an annular cavity 11 and grinding balls 12 , wherein the annular cavity 11 is connected to the air inlet assembly 20 and the discharge assembly 40 , respectively, and the grinding balls 12 are disposed in the annular cavity 11 .

[0043] In the embodiment of the present application, the hollow cavity inside the annular cavity 11 provides a grinding space, and the grinding ball 12 is arranged in the annular cavity 11. When the grinding ball 12 is pushed by the airflow to rotate in the annular cavity 11, the two squeeze and collide with the sample to grind. The grinding ball 12 can be spherical, ellipsoidal, or cylindrical arc-shaped. The cross-sectional shape of the grinding ball 12 needs to be consistent with the cross-sectional shape of the annular cavity 11, that is, both are circular, which is conducive to the full contact between the grinding ball 12 and the internal cavity of the annular cavity 11, increasing the grinding area, and at the same time, the circular cross-section facilitates the smooth movement of the grinding ball 12 in the annular cavity 11.

[0044] Exemplarily, the air intake assembly 20 includes: an air intake pipe 22 and a high-pressure air source 23, wherein the first end of the air intake pipe 22 is connected to the high-pressure air source 23, the second end of the air intake pipe 22 is provided with an air intake hole 21, and the air intake pipe 22 is connected to the annular cavity 11 of the grinding assembly 10 through the air intake hole 21.

[0045] In the embodiment of the present application, the air intake assembly 20 is used to provide high-pressure gas, smooth pipelines, and transmit samples. The air intake hole 21 is arranged at the outermost side of the annular cavity 11, the air intake pipe 22 is connected to the air intake hole 21, and the high-pressure gas source 23 is connected to the air intake pipe 22, and finally connects to the annular cavity 11 through the air intake pipe 22. The gas of the high-pressure gas source 23 finally enters the annular cavity 11 through the air intake pipe 22 and the air intake hole 21. The high-pressure gas source 23 is preferably filtered compressed air. The angle formed by the intersection between the radius formed on the annular cavity 11 through the connection between the annular cavity 11 and the air intake pipe 22 and the center line of the air intake pipe 22 is θ, 90°≤θ<180°.

[0046] In the embodiment of the present application, the high-pressure gas in the high-pressure gas source 23 enters the annular cavity 11 to impact the grinding ball 12 to move in the annular cavity 11, and the material is ground by the extrusion and collision between the grinding ball 12 and the annular cavity 11. The pressure of the high-pressure gas source 23 can make the airflow enter the annular cavity 11 and at least push at least one grinding ball 12 to move. However, if the angle θ is 180°, that is, the air intake pipe 22 also passes through the geometric center of the annular cavity 11, then the high-pressure gas may enter the annular cavity 11 from the air intake hole 21 and be divided into two equal-pressure gas paths along the air intake hole 21 and move along both sides of the annular cavity 11. The forces of the two equal-pressure gas paths in opposite directions cancel each other out and cannot push the grinding ball 12 to move. Therefore, in order to allow the grinding ball 12 to generate the maximum kinetic energy, the recommended optimal θ angle is 90°, that is, the air intake pipe 22 connects the annular cavity 11 along the tangential direction through the air intake hole 21.

[0047] In the embodiment of the present application, the number of the air inlet hole 21, the air inlet pipe 22, and the high-pressure gas source 23 is not less than one, and the high-pressure gas can be supplied continuously or at intervals.

[0048] Exemplarily, the feeding assembly 30 includes: a feeding pipe 32 , a feeding hole 31 is provided at the bottom end of the feeding pipe 32 , and the feeding pipe 32 is connected to the air intake pipe 22 of the air intake assembly 20 through the feeding hole 31 .

[0049] In an embodiment of the present application, a venturi tube can be arranged on the air intake pipe 22, and a feeding hole 31 and a feeding tube 32 are arranged above the venturi tube. Negative pressure can be generated near the feeding hole 31 on the venturi tube, which can automatically adsorb the material in the feeding tube 32 and improve the smoothness of the sample introduction.

[0050] Exemplarily, the feeding component 30 further includes: a spiral injector 33 , and the spiral injector 33 is disposed in the feeding tube 32 .

[0051] In the embodiment of the present application, the feeding hole 31 is a hole for adding materials into the grinder, and the spiral feeder 33 itself can rotate to avoid congestion of materials in the feeding tube 32 during the feeding process and control the feeding speed.

[0052] Exemplarily, the discharge assembly 40 includes: a discharge pipe 42, a separator 44 and a collection bin 47, wherein a discharge hole 41 is provided at the first end of the discharge pipe 42, and the discharge pipe 42 is connected to the annular cavity 11 of the grinding assembly 10 through the discharge hole 41, and the separator 44 has a separator inlet 45 and a separator outlet 46, and the separator inlet 45 is connected to the second end of the discharge pipe 42, and the separator inlet 45 enters the separator 44 along a tangential direction, and the separator outlet 46 is connected to the dust collecting assembly 50, and the bottom end of the separator 44 is connected to the collection bin 47.

[0053] In the embodiment of the present application, the discharge assembly 40 mainly plays the role of filtering the ground material by particle size, transferring the ground sample, separating gas and solid, and collecting the same. The gas-solid material transported by the grinding assembly 10 enters the separator 44 from the discharge pipe 42 and the separator inlet 45. The gas-solid material is subjected to centrifugal action in the separator 44. The solid density and mass are large, and the centrifugal force is large. The solid is thrown to the inner wall of the separator 44, and finally settles to the collection bin 47 along the inner wall under the action of gravity; the gas density and mass are small, and the centrifugal force is small. The gas is on the relatively inner side (the center of the separator 44 is a negative pressure area). After the gas reaches the conical structure at the bottom of the separator 44, it is attracted by the negative pressure and turns upward. It is discharged from the separator outlet 46 along the center of the separator 44, and the ground solid sample then enters the collection bin 47 to complete the grinding.

[0054] Exemplarily, the discharge assembly 40 further includes: a filter screen 43 , which is disposed in the discharge pipe 42 and located between the discharge hole 41 and the separator inlet 45 .

[0055] In the embodiment of the present application, the filter screen 43 is arranged inside the discharge pipe 42 and close to the discharge hole 41. The filter screen 43 completely crosses the discharge pipe 42. Since the grinding balls 12 running at high speed in the annular cavity 11 have a large momentum, some of the grinding balls 12 may hit the filter screen 43, so the filter screen 43 must have no less than two layers. The filter screen 43 is divided into a primary filter screen and a secondary filter screen. The primary filter screen is closer to the discharge hole 41 and is mainly used to intercept the grinding balls 12 to prevent them from damaging the secondary filter screen. The aperture of the primary filter screen is smaller than the minimum size of the grinding balls 12. The filter screen 43 can be moved out or replaced.

[0056] Exemplarily, the dust collecting assembly 50 includes: a dust collecting box 51 , the dust collecting box 51 is connected to the separator outlet 46 of the discharge assembly 40 , and an exhaust port 52 is provided on the dust collecting box 51 .

[0057] In the embodiment of the present application, the dust collecting assembly 50 is used to collect residual particulate matter in the gas discharged from the separator 44 to avoid excessive dust and air pollution caused by direct discharge of the equipment. The dust collecting box 51 is provided with a dust collecting port, and the dust collecting port of the dust collecting box 51 is connected to the separator outlet 46 of the separator 44 to receive residual particulate matter in the gas discharged from the separator 44.

[0058] Exemplarily, the dust collecting assembly 50 further includes: a dust collecting bag 53 , and the dust collecting bag 53 is connected to the exhaust port 52 .

[0059] In the embodiment of the present application, an exhaust port 52 is provided below the dust collecting box 51, and a dust collecting bag 53 is connected to the exhaust port 52. The gas discharged from the separator 44 enters the dust collecting box 51, and the gas contains a small amount of fine powder, and enters the dust collecting bag 53 through the exhaust port 52 in the dust collecting box 51. The gas passes through the dust collecting bag 53 and is discharged into the atmosphere. The dust sample in the dust collecting bag 53 is a recyclable fine sample.

[0060] Illustratively, the ball mill provided in the present application further includes: a vibrator 60 , wherein the vibrator 60 is disposed on the discharge pipe 42 of the discharge assembly 40 .

[0061] In the embodiment of the present application, the vibrator 60 mainly plays the role of vibrating the pipeline or cavity. The vibration of the vibrator 60 can reduce congestion and aggregation, and is used to connect the pipeline and the gas path, while promoting the sample that has not passed through the screen to continue to return to the grinding assembly 10 for further grinding. Since the filter 43 is prone to accumulation of materials, the vibrator 60 is mainly set at the filter 43, the annular cavity 11, each bend pipe and other parts.

[0062] In the embodiment of the present application, the material to be ground is added from the feeding pipe 32 of the feeding component 30, and enters the air inlet pipe 22 of the air inlet component 20 through the feeding hole 31 under the push of the spiral sample injector 33. The high-pressure and high-speed gas released by the high-pressure gas source 23 transports the material to be ground in the air inlet pipe 22 to the annular cavity 11 in the grinding component 10 through the air inlet hole 21. The grinding balls 12 rotate along the annular cavity 11 under the action of the high-pressure and high-speed gas, and the grinding balls 12, the grinding balls 12 and the annular cavity 11, and the sample and the grinding component 11 collide, rub and squeeze with each other, and the grinding process begins. The ground material entering the discharge pipe 42 through the discharge hole 41 enters the separator 44 through the separator inlet 45 if the grinding particle size can pass the requirements of the filter 43. Otherwise, it returns to the annular cavity 11 to continue grinding under the continuous vibration of the vibrator 60 near the filter 43. The gas-solid mixture entering the separator 44 is subjected to the centrifugal force, and the solid particles settle in the collection bin 47. The gas rises at the center of the separator 44 and enters the dust collecting box 51 in the dust collecting assembly 50, and enters the atmosphere through the exhaust port 52 and the dust collecting bag 53.

[0063] In the embodiment of the present application, the grinding assembly 10, the air intake assembly 20, the feeding assembly 30, etc. can be stacked or connected in series to form a multi-stage ball mill. The stacking or series connection can be horizontal stacking or series connection, or vertical stacking or series connection.

[0064] like Figure 8 As shown, a plurality of grinding assemblies 10 are arranged longitudinally, the discharge pipe 42 has a plurality of ports, each port is connected to a grinding assembly 10, and each grinding assembly 10 is equipped with an air intake assembly 20 (not shown in the figure).

[0065] like Fig. 9 As shown, multiple grinding assemblies 10 are arranged horizontally, and two adjacent grinding assemblies 10 are connected by a feeding pipe 32. The grinding assembly 10 at the front end is connected to the air inlet assembly 20, and the grinding assembly 10 at the rear end is connected to a discharge pipe 42, which is connected to the discharge assembly 40.

[0066] In the embodiment of the present application, the high-pressure, high-speed airflow provided by the high-pressure air source 23 drives the grinding balls 12 to roll, impact, squeeze, and other movements in the annular cavity 11, and the materials provided by the feeding assembly 30 are subjected to the combined action of the grinding balls 12 and the annular cavity 11 to complete the grinding operation; in addition to providing power for the grinding balls 12, the high-pressure, high-speed airflow also has the function of conveying the ground materials. The materials with the required particle size are conveyed by the airflow through the filter screen 43 of the discharge assembly 40, and are conveyed to the separator 44 via the discharge pipe 42 and the separator inlet 45; the gas-solid materials entering the separator 44 are subjected to separation in the separator 44. Due to the centrifugal effect, the solid density and mass are large, and the centrifugal force it receives is large. The solid is thrown to the inner wall of the separator 44, and finally settles to the collection bin 47 along the inner wall under the action of gravity. The gas density and mass of the solid powder removed are small, and the centrifugal force it receives is small. The gas is on the relatively inner side (the center of the separator 44 is a negative pressure area). After reaching the conical structure, the gas is attracted by the negative pressure and turns upward, and is discharged from the separator outlet 46 along the center of the separator 44; the discharged gas enters the dust collecting assembly 50, which contains a small amount of fine powder, and enters the dust collecting bag 53 in the dust collecting box 51 through the exhaust port 52.

[0067] In the present application, the annular cavity 11 can be in full contact with the grinding balls 12, and the high-pressure gas continuously or pulse-like impacts the grinding balls 12, which plays a dual role of grinding and conveying samples. The grinding balls 12 can provide rotational power without relying on the mechanical rotation of the traditional ball mill, and continuously feed and discharge samples until the grinding is completed, thereby realizing the continuous operation of the ball mill without stopping, greatly improving the grinding efficiency, and also saving the tedious manual steps such as sample transfer and cleaning.

[0068] The ball mill provided in the present application realizes continuous operation without stopping, greatly improves the grinding efficiency, and saves manual steps such as sample transfer and cleaning.

[0069] It should be noted that, in the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0070] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0071] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0073] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A ball mill, characterized in that: include: A grinding assembly, for grinding; An air inlet assembly, used for inputting gas into the grinding assembly; The air intake assembly is connected to the grinding assembly; A feeding component, used for feeding raw materials into the grinding component; the feeding component is connected to the air intake component; A discharge assembly, used for discharging the abrasive in the grinding assembly; the discharge assembly is connected to the grinding assembly; The dust collecting component is used to collect the residual particles and powder in the gas discharged from the discharging component; the dust collecting component is connected to the discharging component.

2. The ball mill according to claim 1, characterized in that: The grinding assembly comprises: an annular cavity and grinding balls, wherein the annular cavity is connected to the air inlet assembly and the material outlet assembly respectively, and the grinding balls are arranged in the annular cavity.

3. The ball mill according to claim 1, characterized in that: The air intake assembly comprises: an air intake pipe and a high-pressure air source, wherein the first end of the air intake pipe is connected to the high-pressure air source, the second end of the air intake pipe is provided with an air intake hole, and the air intake pipe is connected to the annular cavity of the grinding assembly through the air intake hole.

4. The ball mill according to claim 1, characterized in that: The feeding assembly comprises a feeding pipe, a feeding hole is arranged at the bottom end of the feeding pipe, and the feeding pipe is connected with the air intake pipe of the air intake assembly through the feeding hole.

5. The ball mill according to claim 4, characterized in that: The feeding component also includes: a spiral injector, and the spiral injector is arranged in the feeding tube.

6. The ball mill according to claim 1, characterized in that: The discharge assembly includes: a discharge pipe, a separator and a collection bin, wherein a discharge hole is provided at the first end of the discharge pipe, the discharge pipe is connected to the annular cavity of the grinding assembly through the discharge hole, the separator has a separator inlet and a separator outlet, the separator inlet is connected to the second end of the discharge pipe, the separator outlet is connected to the dust collecting assembly, and the bottom end of the separator is connected to the collection bin.

7. The ball mill according to claim 6, characterized in that The discharge assembly further includes a filter screen, which is disposed in the discharge pipe and between the discharge hole and the separator inlet.

8. The ball mill according to claim 1, characterized in that: The dust collecting assembly comprises: a dust collecting box body, the dust collecting box body is connected to the separator outlet of the discharge assembly, and the dust collecting box body is provided with an exhaust port.

9. The ball mill according to claim 8, characterized in that The dust collecting assembly further includes a dust collecting bag connected to the exhaust port.

10. The ball mill according to claim 1, characterized in that Also includes: A vibrator is arranged on the discharge pipe of the discharge assembly.

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