Graphite ore vertical stirring mill

Abstract

The utility model provides a vertical stirring mill for graphite ores, which is used for effectively protecting graphite flakes in the grinding process of the graphite ores, and comprises a barrel, an ore pulp feeding pipe and an overflow port are respectively arranged at the bottom and the upper part of the barrel; the spiral stirrer is composed of a stirring motor, a stirring shaft and a spiral blade, the stirring motor is fixedly connected to the upper portion of the barrel, one end of the stirring shaft is in transmission connection with an output shaft of the stirring motor, and the stirring shaft is coaxially arranged in the barrel; the lining plate is fixedly connected to the inner wall of the cylinder body, a first protruding area, a second protruding area and a smooth area are sequentially arranged on the inner wall of the lining plate from bottom to top in the height direction, the first protruding area and the second protruding area respectively comprise a plurality of first protrusions and second protrusions, and the first protrusions are higher than the second protrusions; differential surface treatment is adopted in different areas of the lining plate, the grinding strength is adjusted according to the stress conditions of the graphite ore at different heights, excessive grinding of the graphite ore is effectively reduced, and scale damage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of rail processing equipment, in particular to a graphite ore vertical stirring mill. Background Art

[0002] Flake graphite is a very important non-metallic mineral material. It has excellent properties such as high temperature resistance, thermal conductivity, thermal shock resistance and lubricity. It is widely used in metallurgy, machinery, chemical industry, refractory materials, aerospace and other industries. Flake graphite has a special structure. The larger the flakes and the higher the carbon content, the greater their corresponding value. Therefore, during the graphite grinding and separation process, the large graphite flakes must be protected from being destroyed.

[0003] In actual operation, the existing stirred mill is prone to over-grinding, resulting in the loss of large-scale graphite flakes. To address the problem of over-grinding of graphite ore, the existing technology generally uses grinding media with lower hardness and regular shape, such as ceramic balls or glass balls, or smaller grinding media to reduce damage to graphite flakes, or reduce the mill speed, etc. However, the above methods may cause inadequate grinding and reduced grinding efficiency due to the grinding intensity. Utility Model Content

[0004] The utility model provides a graphite ore vertical stirred mill to achieve effective protection of graphite flakes during the graphite ore grinding process. In order to achieve the above purpose, the technical solutions adopted are as follows:

[0005] A graphite ore vertical stirred mill, characterized by comprising:

[0006] A cylinder, wherein the bottom and the top of the cylinder are respectively provided with a slurry feed pipe and an overflow port;

[0007] The spiral stirrer is composed of a stirring motor, a stirring shaft and a spiral blade. The stirring motor is fixedly connected to the top of the cylinder. One end of the stirring shaft is drivingly connected to the output shaft of the stirring motor and the stirring shaft is coaxially arranged inside the cylinder.

[0008] The lining is fixedly connected to the inner wall of the cylinder, and the inner wall of the lining is provided with a first raised area, a second raised area and a smooth area in sequence from bottom to top in the height direction. The first raised area and the second raised area respectively include multiple first raised areas and second raised areas, and the height of the first raised area is greater than that of the second raised area.

[0009] Furthermore, the distribution density of the second protrusions in the second protrusion area is smaller than the distribution density of the first protrusions in the first protrusion area.

[0010] Furthermore, a recoil pipe is connected to the bottom of the cylinder.

[0011] Furthermore, a sewage pipe is connected to the bottom of the cylinder.

[0012] Furthermore, a support plate is fixedly connected to the bottom end of the cylinder, and a vibrator is connected between the support plate and the cylinder.

[0013] Furthermore, a supporting plate is fixedly connected to the bottom end of the stirring shaft, and the supporting plate is spaced apart from the support plate.

[0014] Furthermore, the support plates are distributed obliquely downward in a direction from the feed pipe to the sewage pipe.

[0015] The utility model is beneficial in that:

[0016] 1. Different surface treatment strategies are adopted in different areas of the liner according to different stages of the grinding process. The bottom feed area is set to have a surface with higher protrusions, which helps to ensure that large-particle graphite ore can be effectively processed in the initial crushing stage, increase the initial crushing strength, and improve the dissociation effect of the graphite ore. In the middle area, protrusions with lower height and lower density are set to reduce the risk of over-grinding. In the upper overflow area, a relatively smooth surface can be used to facilitate the smooth discharge of fine particles. Through the above structural design, this device can effectively reduce the risk of over-grinding of graphite ore while ensuring improved graphite ore grinding efficiency.

[0017] 2. The raised design can make the contact between the graphite ore and the liner more "dispersed" and gentle. Even if the friction is large, the graphite ore will not be subjected to excessive impact in a local area due to the small gaps formed by the raised protrusions. Therefore, it helps to disperse the impact force of the material and reduce the breakage of particles due to excessive force. In particular, the protective effect on the graphite ore scales is more obvious;

[0018] 3. The recoil pipe can be set up to drive the internal slurry flow, thereby improving the grinding efficiency. After the grinding is completed, the residual slag at the bottom of the cylinder can be cleaned through the recoil pipe;

[0019] 4. The support plate and vibrator are set to vibrate the frame slag remaining on the support plate. Combined with the backflush pipe, the cleaning effect can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model

[0021] Figure 2 A partially enlarged schematic diagram of the first raised area

[0022] Figure 3 A partial enlarged schematic diagram of the second raised area

[0023] Figure 4 A local enlarged schematic diagram of the smooth area

[0024] Among them: 1-cylinder, 2-servo motor, 3-rotating shaft, 4-spiral blade, 5-feed pipe, 6-backflush pipe, 7-overflow port, 8-drain pipe, 9-liner, 10-first raised area, 11-second raised area, 12-smooth area, 13-first raised area, 14-second raised area, 15-support plate, 16-support plate, 17-vibrator. DETAILED DESCRIPTION

[0025] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0026] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the viewing direction or position relationship, and are only for the convenience of describing the utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0027] In this embodiment, for the convenience of description, the length direction of the bed, that is, the processing sequence direction, is taken as the front-to-back direction, and the width direction of the bed is taken as the left-to-right direction.

[0028] like Figure 1 The graphite ore vertical stirring mill shown includes a cylinder 1, a servo motor 2, and a spiral stirrer. A feed pipe 5 is provided at the lower part of the cylinder 1, an overflow port 7 is provided at the upper part, a cylinder cover is connected to the top of the cylinder 1, and the servo motor 2 is fixedly connected to the top of the cylinder cover. The spiral stirrer consists of a rotating shaft 3 and a spiral blade 4. The axis of the rotating shaft 3 is distributed in the vertical direction and the upper end is connected to the output shaft of the servo motor 2. The part of the rotating shaft 3 located inside the cylinder 1 is connected to the spiral blade 4, which can be driven to rotate by the servo motor 2. In addition, a lining plate 9 is fixedly connected to the inner side wall of the cylinder 1, and the lining plate 9 is provided with different surface structures in different height directions.

[0029] Specifically, the liner 9 is designed in sections, such as Figure 2-Figure 4From bottom to top, there are a first raised area 10, a second raised area 11 and a smooth area 12. The first raised area 10 is a plurality of first protrusions 13 arranged at the lower part of the inner wall of the liner 9. The plurality of first protrusions 13 are evenly spaced. In this embodiment, the height of the first protrusions 13 is 5 to 10 mm. The first raised area 10 is mainly used for preliminary grinding and crushing of large-particle ore. Therefore, the height of the protrusion in this area is relatively high, which helps to provide a strong shear force and effectively improve the monomer dissociation efficiency of the graphite ore. The second raised area 11 is a plurality of second protrusions 14 evenly spaced and arranged in the middle of the inner wall of the liner 9. The height of the second protrusion 14 is 3~5mm, used to further refine the ore particles. The height and density of the second protrusions 14 are lower than those of the first protrusions 13 to avoid excessive wear on the already refined particles. In this area, the role of the second protrusions 14 is mainly to provide moderate friction to help the ore particles to fully contact the grinding medium, while avoiding damage to the graphite flakes caused by excessive wear; the smooth area 12 is located in the upper area of the inner side wall of the liner 9, that is, the upper part of the inner side wall of the liner 9 is a smooth plane. The smooth area 12 mainly serves as a guide structure, which is conducive to the smooth discharge of qualified materials after grinding, and avoids the problem of scale damage caused by excessive wear between the ground material and the side wall of the liner 9.

[0030] At the bottom of the cylinder 1, where the material has just entered, the first protrusions 13 are provided to increase the initial crushing strength and improve the graphite ore dissociation effect, ensuring that large-particle graphite ore can be effectively processed in the initial crushing stage. As the material moves upward, the shear force and friction of the spiral blades 4 gradually increase, and the shear force and friction generated by the collision between the materials also become more significant. The second protrusions 14 of smaller height and density in the middle area appropriately increase the friction and shear force between the graphite ore and the liner 9 within a reasonable range, but are still smaller than those in the bottom area to prevent excessive wear of the graphite flakes. In the upper area, the material has basically been fully ground, and the final stage of refinement is mainly completed by slight shearing. Therefore, the upper part of the liner 9 adopts a smooth surface to avoid excessive grinding between the material and the liner. At the same time, the smooth area 12 can serve as a guide plate to facilitate the discharge of the ground graphite ore through the overflow port. By using differentiated surface treatments in different areas of the liner 9, the grinding intensity is adjusted according to the stress conditions of the graphite ore at different heights, effectively reducing over-grinding of the graphite ore and preventing flake damage.

[0031] In this embodiment, a backflush pipe 6 and a sewage pipe 8 are respectively connected to the left and right sides of the bottom of the cylinder 1. The backflush pipe 6 and the feed pipe 5 share the same inlet. High-pressure flushing water can be injected into the interior of the cylinder 1 through the backflush pipe 6, thereby avoiding blockage of the feed port at the bottom of the cylinder 1 to a certain extent, and promoting the circulation of the grinding material inside the cylinder 1, accelerating material classification and improving grinding efficiency.

[0032] A support plate 16 is also fixedly connected above the bottom end of the cylinder 1. The height of the support plate 16 is flush with the feed port and the sewage outlet of the cylinder 1, and a vibrator 17 is provided between the support plate 16 and the bottom plate of the cylinder 1. When sludge or blockage problems occur in the cylinder 1, the support plate 16 can be vibrated by the vibrator 17. At the same time, high-pressure flushing water is added to the support plate 16 in combination with the backflush pipe 6. The two can cooperate to clean the sludge on the support plate 16 and discharge it through the sewage pipe 8, avoiding blockage and improving cleaning efficiency. Of course, in order to further improve the sewage cleaning effect, the support plate 16 can be arranged to be distributed at a certain inclination angle downward in the direction from the feed pipe 5 to the sewage pipe 8.

[0033] In addition, a support plate 15 is fixedly connected to the bottom end of the rotating shaft 3. The support plate 15 and the support plate 16 are spaced apart, and the gap is the maximum diameter of the grinding medium. In this embodiment, ceramic balls are used as the grinding medium. There are slurry and ceramic balls between the support plate 15 and the support plate 16, which mainly play a supporting role and can reduce the wear of the rotating shaft 3.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as within the scope of protection of the present invention.

Claims

1. A graphite ore vertical stirred mill, characterized in that, include: A cylinder, wherein the bottom and the top of the cylinder are respectively provided with a slurry feed pipe and an overflow port; The spiral stirrer is composed of a stirring motor, a stirring shaft and a spiral blade. The stirring motor is fixedly connected to the top of the cylinder. One end of the stirring shaft is drivingly connected to the output shaft of the stirring motor and the stirring shaft is coaxially arranged inside the cylinder. The lining is fixedly connected to the inner wall of the cylinder, and the inner wall of the lining is provided with a first raised area, a second raised area and a smooth area in sequence from bottom to top in the height direction. The first raised area and the second raised area respectively include multiple first raised areas and second raised areas, and the height of the first raised area is greater than that of the second raised area.

2. The graphite ore vertical stirred mill according to claim 1, characterized in that The distribution density of the second protrusions in the second protrusion area is smaller than the distribution density of the first protrusions in the first protrusion area.

3. The graphite ore vertical stirred mill according to claim 1, characterized in that The bottom of the cylinder is also connected with a recoil pipe.

4. The graphite ore vertical stirred mill according to claim 1, characterized in that The bottom of the cylinder is also connected with a sewage pipe.

5. The graphite ore vertical stirred mill according to claim 1, characterized in that A support plate is fixedly connected to the bottom end of the cylinder, and a vibrator is connected between the support plate and the cylinder.

6. The graphite ore vertical stirred mill according to claim 5, characterized in that The bottom end of the stirring shaft is fixedly connected with a supporting plate, and the supporting plate is spaced apart from the support plate.

7. The graphite ore vertical stirred mill according to claim 5, characterized in that The support plates are distributed obliquely downward in a direction from the feed pipe to the sewage pipe.

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