Ball mill for cement processing

Abstract

This utility model relates to a ball mill for cement processing, comprising a frame, a cylinder, and a drive mechanism. The cylinder is rotatably mounted on the frame, and the drive mechanism is connected to the cylinder and drives the cylinder to rotate. The cylinder has a feed inlet and a discharge outlet at its two ends. A grate is provided inside the cylinder near the discharge outlet. Multiple liners are provided on the inner wall of the cylinder, and multiple protrusions are provided on the inner surface of the liners. These protrusions are distributed along a cylindrical helix, and the central axis of the helix coincides with the rotation axis of the cylinder. This application provides protrusions on the liners, distributed along a cylindrical helix. These protrusions can, on the one hand, drive the grinding media to a higher impact point to enhance the impact crushing effect, and on the other hand, slowly push the material towards the discharge outlet.

Description

Technical Field

[0001] This utility model relates to the field of ball mill technology, specifically to a ball mill used in cement processing. Background Technology

[0002] A ball mill is a key piece of equipment for further pulverizing materials after they have been crushed. It contains a certain number of steel balls or forged steel as grinding media. The rotating cylinder moves the grinding media within the cylinder to grind the material. As the cylinder rotates, the grinding media also rises to a certain height before falling back down to crush the material, achieving the desired crushing and grinding effect. It is widely used in the production of cement, silicate products, new building materials, refractory materials, fertilizers, ferrous and non-ferrous metal ore beneficiation, and glass and ceramics, for dry or wet grinding of various ores and other grindable materials.

[0003] The inner wall of a ball mill is lined with a liner to protect against impact and wear. The inner surface of the liner in existing ball mills (i.e. the side that mates with the grinding media) is usually a single curved surface, which has limited effect on improving the grinding efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a ball mill for cement processing, addressing the above-mentioned shortcomings.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: A ball mill for cement processing includes a frame, a cylinder, and a drive mechanism. The cylinder is rotatably mounted on the frame, and the drive mechanism is connected to the cylinder and drives the cylinder to rotate. The two ends of the cylinder are respectively provided with a feed inlet and a discharge outlet. A grate plate is provided at the end of the cylinder near the discharge outlet. Multiple liners are provided on the inner wall of the cylinder, and multiple protrusions are provided on the inner surface of the liners. The protrusions are distributed along a cylindrical helix, and the central axis of the cylindrical helix coincides with the rotation axis of the cylinder.

[0006] Furthermore, the protrusion includes a first inclined surface, a second inclined surface, a third inclined surface, and a fourth inclined surface. The first and second inclined surfaces are distributed along the axial direction of the cylinder and are two trapezoidal surfaces arranged opposite each other. The third and fourth inclined surfaces are distributed along the circumference of the cylinder and are two triangular surfaces arranged opposite each other.

[0007] Furthermore, the drive mechanism includes a motor and a reducer, the output end of the motor is connected to the input end of the reducer, and the output end of the reducer is connected to the cylinder through a coupling.

[0008] Furthermore, the cylinder is provided with a feed pipe and a discharge pipe at its two ends respectively. The first end of the discharge pipe is connected to the discharge port, and the first end of the feed pipe is connected to the feed port. Both the discharge pipe and the feed pipe are provided with spiral blades.

[0009] Furthermore, the second end of the discharge pipe is provided with a plurality of first strip-shaped holes, which are distributed along the circumference of the discharge pipe. A discharge hopper is sleeved on the outer side of the second end of the discharge pipe, which covers the first strip-shaped holes. An exhaust port is provided at the top of the discharge hopper, and a discharge port is provided at the bottom.

[0010] Furthermore, an interlayer is provided between the inner wall of the cylinder and the grate plate. The interlayer can be provided with multiple partition plates arranged radially along the cylinder. All the partition plates are distributed circumferentially along the cylinder. The first end of the discharge pipe is provided with multiple second strip-shaped holes, which communicate with the interlayer.

[0011] Furthermore, it also includes a feed hopper connected to the second end of the feed pipe.

[0012] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages: This application features protrusions on the liner, distributed along a cylindrical spiral. These protrusions can, on the one hand, drive the grinding media to a higher drop point to enhance the impact crushing effect, and on the other hand, slowly push the material toward the discharge port.

[0013] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the ball mill in an embodiment of this application; Figure 2 This is a three-dimensional structural diagram of the ball mill from another angle in an embodiment of this application; Figure 3 This is a cross-sectional view of the ball mill in an embodiment of this application; Figure 4 This is a cross-sectional view of the ball mill from an oblique angle in an embodiment of this application; Figure 5 for Figure 4 Enlarged view of point A.

[0015] The attached diagram lists the components represented by each number as follows: 1. Frame; 2. Cylinder; 21. Feed inlet; 22. Discharge outlet; 23. Grate; 24. Liner; 241. Protrusion; 241a. First inclined surface; 241b. Second inclined surface; 241c. Third inclined surface; 241d. Fourth inclined surface; 25. Feed pipe; 26. Discharge pipe; 261. First strip hole; 262. Second strip hole; 262. Second strip hole; 27. Interlayer; 271. Partition plate; 3. Drive mechanism; 31. Motor; 32. Reducer; 33. Coupling; 4. Spiral blade; 5. Discharge hopper; 51. Exhaust port; 52. Discharge outlet; 6. Feed hopper. Detailed Implementation

[0016] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0017] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise" and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0018] Example 1 people Figure 1 , Figure 2 and Figure 3 As shown, a ball mill for cement processing includes a frame 1, a cylinder 2, and a drive mechanism 3. The cylinder 2 is rotatably mounted on the frame 1. The drive mechanism 3 is connected to the cylinder 2 and is used to drive the cylinder 2 to rotate. The two ends of the cylinder 2 are respectively provided with a feed inlet 21 and a discharge outlet 22. A grate plate 23 is provided at one end of the cylinder 2 near the discharge outlet 22. Multiple liners 24 are provided on the inner wall of the cylinder 2. Multiple protrusions 241 are provided on the inner surface of the liners 24. The protrusions 241 are distributed along a cylindrical helix, and the central axis of the cylindrical helix coincides with the rotation axis of the cylinder 2.

[0019] like Figure 5As shown, in this embodiment, the protrusion 241 includes a first inclined surface 241a, a second inclined surface 241b, a third inclined surface 241c, and a fourth inclined surface 241d. The first inclined surface 241a and the second inclined surface 241b are distributed along the axial direction of the cylinder 2, and the first inclined surface 241a and the second inclined surface 241b are two trapezoidal surfaces arranged opposite each other. The third inclined surface 241c and the fourth inclined surface 241d are distributed along the circumferential direction of the cylinder 2, and the third inclined surface 241c and the fourth inclined surface 241d are two triangular surfaces arranged opposite each other. The first inclined surface 241a and the second inclined surface 241b are both distributed along a cylindrical helix, and the diameter of the cylindrical helix is ​​the same as the inner diameter of the cylinder 2.

[0020] In this embodiment, the drive mechanism 3 includes a motor 31 and a reducer 32. The output end of the motor 31 is connected to the input end of the reducer 32 through a belt drive mechanism. The output end of the reducer 32 is connected to the cylinder 2 through a coupling 33. Specifically, the output end of the reducer 32 is connected to the second end of the discharge pipe 26 through the coupling 33.

[0021] like Figure 3 and Figure 4 As shown, the cylinder 2 is provided with a feed pipe 25 and a discharge pipe 26 at both ends. The first end of the discharge pipe 26 is connected to the discharge port 22, and the first end of the feed pipe 25 is connected to the feed port 21. Both the discharge pipe 26 and the feed pipe 25 are provided with spiral blades 4. When the feed pipe 25 and the discharge pipe 26 rotate, the spiral blades 4 can push the material to move in the feed pipe 25 and the discharge pipe 26. Specifically, the spiral blades 4 and the cylindrical helix have the same rotation direction.

[0022] Specifically, it also includes a feed hopper 6 and a discharge hopper 5. The output end of the feed hopper 6 is connected to the second end of the feed pipe 25. The second end of the discharge pipe 26 is provided with a plurality of first strip holes 261. The first strip holes 261 are distributed along the circumference of the discharge pipe 26. The discharge hopper 5 is sleeved on the outside of the second end of the discharge pipe 26. The discharge hopper 5 covers the first strip holes 261. The top of the discharge hopper 5 is provided with an exhaust port 51 and the bottom is provided with a discharge port 52.

[0023] like Figure 4As shown, specifically, an interlayer 27 is provided between the inner wall of the cylinder 2 and the grate 23. The interlayer 27 can be provided with multiple partition plates 271 arranged radially along the cylinder 2. All partition plates 271 are distributed circumferentially along the cylinder 2. The partition plates 271 divide the interlayer 27 into multiple fan-shaped spaces. The first end of the discharge pipe 26 is provided with multiple second strip holes 262, which are the discharge ports 22. The screen holes on the grate 23 are connected to each fan-shaped space. The multiple second strip holes 262 on the discharge pipe 26 are connected to multiple fan-shaped spaces respectively. When the material enters the fan-shaped space (i.e., the interlayer 27) through the grate 23, as the cylinder 2 rotates, the material in the fan-shaped space will tilt towards the second strip holes 262 to pour the material in the fan-shaped space into the discharge pipe 26.

[0024] It should be noted that when the cylinder 2 of this application rotates, it will cause the protrusions 241 on the liner 24 to rotate. Since the protrusions 241 are distributed along a cylindrical spiral, they will slowly push the material and grinding media inside the cylinder towards the discharge port 22. When the length of the cylinder 2 is too long, if the grinding media accumulates at the discharge port 22, it will lead to a decrease in grinding efficiency. Therefore, a baffle (e.g., a partition plate) can be set in the middle of the cylinder 2. Figure 3 The hollow arrow indicates the location where the internal space of the cylinder 2 is divided into multiple sections to confine the grinding media within a certain range. The partition is provided with through holes that allow the raw material to pass through, but the grinding media cannot pass through the through holes.

[0025] In use, the cylinder 2 is driven to rotate by the drive mechanism 3, and the material is conveyed into the cylinder 2 through the feed hopper 6 and the feed pipe 25. When the cylinder 2 rotates, it will drive the grinding media (usually steel balls) to rise to a certain height. Then the steel balls fall and, together with the protrusions 241 on the liner 24, crush large pieces of material. When the cylinder 2 rotates, it will also drive the grinding media to move along the liner 24. The grinding media can work with the liner 24 and the protrusions 241 on the liner 24 to crush and grind the material, turning the material into smaller particles. The material being ground moves toward the discharge port 22 under the guidance of the protrusion 241 and the airflow. The grate 23 only allows material ground to a certain fineness to pass through. After passing through the grate 23, the material enters the interlayer 27 and tilts as the cylinder 2 rotates. It then enters the discharge pipe 26 through the second strip hole 262 and moves along the discharge pipe 26 to the first strip hole 261. The material is then discharged from the first strip hole 261 and enters the discharge hopper 5, and finally is discharged from the discharge port 52.

[0026] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A ball mill for cement processing, characterized in that, The device includes a frame (1), a cylinder (2), and a drive mechanism (3). The cylinder (2) is rotatably mounted on the frame (1). The drive mechanism (3) is connected to the cylinder (2) and is used to drive the cylinder (2) to rotate. The two ends of the cylinder (2) are respectively located at the feed inlet (21) and the discharge outlet (22). A grate plate (23) is provided at one end of the cylinder (2) near the discharge outlet (22). Multiple liners (24) are provided on the inner wall of the cylinder (2). Multiple protrusions (241) are provided on the inner surface of the liners (24). The protrusions (241) are distributed along a cylindrical spiral line, and the central axis of the cylindrical spiral line coincides with the rotation axis of the cylinder (2).

2. The ball mill for cement processing according to claim 1, characterized in that, The protrusion (241) includes a first inclined surface (241a), a second inclined surface (241b), a third inclined surface (241c), and a fourth inclined surface (241d). The first inclined surface (241a) and the second inclined surface (241b) are distributed along the axial direction of the cylinder (2). The first inclined surface (241a) and the second inclined surface (241b) are two trapezoidal surfaces arranged opposite each other. The third inclined surface (241c) and the fourth inclined surface (241d) are distributed along the circumferential direction of the cylinder (2). The third inclined surface (241c) and the fourth inclined surface (241d) are two triangular surfaces arranged opposite each other.

3. The ball mill for cement processing according to claim 1, characterized in that, The drive mechanism (3) includes a motor (31) and a reducer (32). The output end of the motor (31) is connected to the input end of the reducer (32), and the output end of the reducer (32) is connected to the cylinder (2) through a coupling (33).

4. The ball mill for cement processing according to claim 1, characterized in that, The cylinder (2) is provided with a feed pipe (25) and a discharge pipe (26) at both ends. The first end of the discharge pipe (26) is connected to the discharge port (22), and the first end of the feed pipe (25) is connected to the feed port (21). Both the discharge pipe (26) and the feed pipe (25) are provided with spiral blades (4).

5. The ball mill for cement processing according to claim 4, characterized in that, The second end of the discharge pipe (26) is provided with a plurality of first strip holes (261), the first strip holes (261) are distributed along the circumference of the discharge pipe (26), and a discharge hopper (5) is sleeved on the outer side of the second end of the discharge pipe (26), the discharge hopper (5) covers the first strip holes (261), the top of the discharge hopper (5) is provided with an exhaust port (51), and the bottom is provided with a discharge port (52).

6. The ball mill for cement processing according to claim 4, characterized in that, An interlayer (27) is provided between the inner wall of the cylinder (2) and the grate (23). The interlayer (27) can be provided with a plurality of partition plates (271) arranged radially along the cylinder (2). All the partition plates (271) are distributed circumferentially along the cylinder (2). The first end of the discharge pipe (26) is provided with a plurality of second strip holes (262), and the second strip holes (262) are connected to the interlayer (27).

7. The ball mill for cement processing according to claim 4, characterized in that, It also includes a feed hopper (6) connected to the second end of the feed pipe (25).

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