Safe low-temperature ore discharging device of rod mill

Abstract

The utility model discloses a safe low-temperature ore discharging device of a rod mill, which relates to the technical field of rod mills and comprises a rod mill discharging hopper, a bar screen drum is mounted at a port of the rod mill discharging hopper, a first spiral guide plate is fixed in the bar screen drum, a temporary storage box for temporarily storing materials is mounted at a discharging end of the bar screen drum, and a return pipe extends into the temporary storage box. A second spiral guide plate is mounted in the material return pipe, and materials in the temporary storage box are conveyed back into the rod mill when the second spiral guide plate rotates; wherein when the first spiral guide plate rotates, materials in the strip screen drum are conveyed into the temporary storage box, through the design of a double-spiral structure and the strip screen drum, the discharged materials can be sorted, the sorted large-particle materials can be returned into the rod mill, the workload of workers is greatly reduced, the working efficiency is improved, and the working efficiency is improved. And meanwhile, the risk caused by manual shoveling is reduced, the surrounding environment of the mill and the equipment sanitation are well kept, and a good working environment is created for staff.

Description

Technical Field

[0001] The utility model relates to the technical field of rod mills, in particular to a low-temperature ore safe discharging device of a rod mill. Background Art

[0002] Rod mill is a kind of mill with steel rods as grinding media in the cylinder. Rod mill is generally of wet overflow type and can be used as primary open circuit grinding. It is widely used in primary grinding in artificial stone sand, mineral processing plants, chemical plants and power departments.

[0003] After searching, a patent document with the announcement number "CN220160130U" discloses a rod mill, including a power drive unit, a drum and an end plate. The end plate includes a front end plate and a rear end plate. A feed port is provided on the front end plate. An annular plate is provided on the outer side of the drum wall near the rear end plate. The discharge port is evenly penetrated through the drum wall in sequence and arranged in an annular groove formed by the annular plate. Lining plates and steel rods are provided in the drum. The asymmetric setting of the liner enables the steel rods to be thrown higher in the rod mill, thereby improving the grinding effect and crushing rate of the steel slag. A material guide device is provided at the feed port to directly feed the metallurgical slag material into the drum, thereby improving work efficiency.

[0004] Based on the above search and combined with the existing technology, it is found that the existing rod mill generally adopts the peripheral side discharge when discharging (a discharge port is set on the peripheral side, the discharge port is opened during discharging, and the discharge is completed when the discharge port rotates to the bottom. A discharge hopper is generally provided below for guiding the material). However, due to the large particles of low-temperature ore, after the mill production capacity is increased to 220t / h, the ore that is not fully ground is spit out from the discharge end of the rod mill and accumulates seriously at the mill discharge port, which not only increases the cleaning workload of the team members, but also increases the safety hazards of personnel cleaning, causing difficulties in on-site environmental management and other problems. Therefore, a safe discharge device for low-temperature ore of rod mill is needed. Utility Model Content

[0005] The purpose of this application is to provide a low-temperature ore safe discharge device for a rod mill to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a rod mill low-temperature ore safe discharge device, comprising a rod mill discharge hopper, a bar screen drum installed at the end of the rod mill discharge hopper, a first spiral guide plate fixed in the bar screen drum, a temporary storage box for temporarily storing materials installed at the discharge end of the bar screen drum, a return pipe extending into the temporary storage box, a second spiral guide plate installed in the return pipe, and the second spiral guide plate returns the material in the temporary storage box to the rod mill when it rotates;

[0007] When the first spiral guide plate rotates, the material in the screen drum is transported to the temporary storage box.

[0008] As a further supplement to this solution, the bar screen drum is fixed to the rod mill discharge hopper through a connecting piece. The rod mill discharge hopper is a cylindrical body coaxially arranged with the rod mill. The second spiral guide plate is fixed to the inner wall of the return pipe. The outer side of the return pipe is fixed to the inner side of the bar screen drum through a fixing rod, and the return pipe and the bar screen drum are coaxially arranged.

[0009] As a further supplement to this solution, one end of the return pipe extends into the rod mill, the second spiral guide plate has a spiral direction opposite to that of the first spiral guide plate, and the spiral gap of the second spiral guide plate is larger than that of the first spiral guide plate.

[0010] As a further supplement to this solution, the temporary storage box includes a folding box, which is located at the end of the bar screen cylinder away from the rod mill discharge hopper and is fixed to the bar screen cylinder by bolts. The end of the folding box away from the bar screen cylinder forms a closed end, and the other end of the return pipe extends into the folding box;

[0011] Among them, a supporting ring frame is rotatably sleeved on the outer side of the folding box, and the lower end of the supporting ring frame is fixed to the ground through a bracket.

[0012] As a further supplement to this solution, a material blocking cone is fixed in the middle of the folding box. The material blocking cone is coaxially arranged with the return pipe, and the cone head end of the material blocking cone extends into the return pipe.

[0013] As another improvement of the present application, the bar screen drum is rotatably connected to the tail end of the rod mill discharge hopper through a bearing. The rod mill discharge hopper is a circular tube body whose upper end corresponds to the discharge port below the rod mill. A driven gear ring is fixed to the outside of the bar screen drum, and the driven gear ring is connected to the driving gear of the rod mill.

[0014] The temporary storage box includes a transfer box, one side of the transfer box is rotatably connected and communicated with the tail end of the bar screen drum away from the rod mill discharge hopper, the lower end of the return pipe is fixed through the transfer box and extends to the lower part of the transfer box, the second spiral guide plate is gap-matched with the inner side of the return pipe, the return pipe is vertically arranged, and the upper end of the return pipe forms a closed mouth, a drive motor is fixed to the upper end of the return pipe, the output shaft of the drive motor is downward and fixed with a drive shaft, the drive shaft is fixed to the second spiral guide plate, the drive shaft and the return pipe are coaxially arranged, and a return hopper is fixed on one side of the upper part of the return pipe and communicated with the return hopper, and the return hopper is communicated with the feed hopper of the rod mill.

[0015] As another improvement supplement to the present application, the spiral gap of the second spiral guide plate is the same as the spiral gap of the first spiral guide plate, the lower end of the second spiral guide plate extends below the return pipe, and there is a gap between the lower end of the second spiral guide plate and the bottom wall of the transfer box.

[0016] In summary, the technical effects and advantages of the utility model are:

[0017] 1. In the utility model, the double helix structure is combined with the design of the bar screen drum, which not only separates the discharged materials by screening them, but also returns the large particles after separation to the rod mill, which greatly reduces the workload of the staff and the risks brought by manual shoveling. It also keeps the environment around the mill and the equipment hygienic, and creates a good working environment for the employees.

[0018] 2. In the utility model, the split improvement of the double helix structure can also reduce the modification of the existing rod mill, and is suitable for large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 Schematic diagram of the three-dimensional structure in Example 1;

[0021] Figure 2 is a cross-sectional view in Example 1;

[0022] Figure 3 This is a schematic diagram of the overall structure when connected to the rod mill discharge hopper in Example 1;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure in Example 2.

[0024] In the figure: 1. Bar screen drum; 11. First spiral guide plate; 12. Driven gear ring; 2. Return pipe; 21. Second spiral guide plate; 22. Return hopper; 3. Folding box; 4. Baffle cone; 5. Support ring frame; 6. Connector; 7. Drive shaft; 71. Drive motor; 8. Transfer box; 9. Rod mill discharge hopper. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 making creative efforts are within the scope of protection of the present invention. Example 1

[0026] refer to Figure 1-Figure 3The rod mill low-temperature ore safety discharge device shown includes a rod mill discharge hopper 9, which is a cylindrical body arranged coaxially with the rod mill and is integrally formed with the end of the rod mill away from the feed hopper (or feed port). A bar screen drum 1 is installed at the end of the rod mill discharge hopper 9. The bar screen drum 1 is fixed to the rod mill discharge hopper 9 by a connecting member 6 (such as a flange structure). A first spiral guide plate 11 is fixed in the bar screen drum 1.

[0027] A temporary storage box for temporarily storing materials is installed at the discharge end of the bar screen drum 1. The temporary storage box includes a folding box 3. The folding box 3 is located at the end of the bar screen drum 1 away from the rod mill discharge hopper 9 and is fixed to the bar screen drum 1 by bolts. The end of the folding box 3 away from the bar screen drum 1 forms a closed end. A support ring frame 5 is rotatably sleeved on the outer side of the folding box 3, the lower end of which is fixed to the ground through a bracket.

[0028] A return pipe 2 extends into the folding box 3. The outer side of the return pipe 2 is fixed to the inner side of the screen drum 1 through a fixing rod. The return pipe 2 and the screen drum 1 are coaxially arranged. A second spiral guide plate 21 is fixed in the return pipe 2.

[0029] The second spiral guide plate 21 has a spiral direction opposite to that of the first spiral guide plate 11. When the first spiral guide plate 11 rotates, the material in the bar screen drum 1 is transported into the folding box 3. When the second spiral guide plate 21 rotates, the material in the temporary storage box is sent back to the rod mill.

[0030] Based on the above structure, the rod mill rotates itself when discharging, and transports the material from the rod mill discharge hopper 9 to the bar screen drum 1. The bar screen drum 1 rotates accordingly and screens the material. The material that meets the requirements falls from the bar screen drum 1, and the large particles of material move to the folding box 3 under the guidance of the first spiral guide plate 11. At the same time, the return pipe 2 rotates synchronously with the bar screen drum 1 and drives the second spiral guide plate 21 to rotate. When the second spiral guide plate 21 rotates, it transports the material temporarily stored in the folding box 3 back to the inside of the rod mill, so that the large particles that do not meet the requirements are directly returned to the rod mill and wait for the next grinding. Not only can the discharged material be sorted by screening the material, but the sorted large particles can also be returned to the rod mill, which greatly reduces the workload of the staff and reduces the risks brought by manual shoveling, so that the environment around the mill and the hygiene of the equipment are well maintained, and also creates a good working environment for employees.

[0031] Furthermore, the spiral gap of the second spiral guide plate 21 is larger than the spiral gap of the first spiral guide plate 11, which is conducive to quickly returning the large particle material in the folding box 3 to the rod mill, and the return efficiency is higher, which can meet the screening and conveying capacity of the bar screen drum 1 and avoid the accumulation of materials in the folding box 3;

[0032] In addition, a material blocking cone 4 is fixed in the middle of the folding box 3. The material blocking cone 4 is coaxially arranged with the return pipe 2, and the cone head end of the material blocking cone 4 extends into the return pipe 2, so that the material in the folding box 3 can enter the return pipe 2 more smoothly, thereby ensuring the effectiveness of the return pipe 2 in returning the material. Example 2

[0033] refer to Figure 4 The rod mill low-temperature ore safety discharge device shown includes a rod mill discharge hopper 9, which is a circular tube with an upper end corresponding to the discharge port below the rod mill. A bar screen drum 1 is installed at the end of the rod mill discharge hopper 9. The bar screen drum 1 is rotatably connected to the tail end of the rod mill discharge hopper 9 through a bearing. A driven gear ring 12 is fixed to the outside of the bar screen drum 1. The driven gear ring 12 is transmission-connected to the driving gear of the rod mill (not shown in the figure, which is the prior art);

[0034] A first spiral guide plate 11 is fixed in the screen drum 1. A temporary storage box for temporarily storing materials is installed at the discharge end of the screen drum 1. The temporary storage box includes a transfer box 8. One side of the transfer box 8 is rotatably connected and communicated with the tail end of the screen drum 1 away from the rod mill discharge hopper 9;

[0035] A return pipe 2 extends into the transfer box 8. The lower end of the return pipe 2 is fixedly passed through the transfer box 8 and extends to the lower part of the transfer box 8. The return pipe 2 is vertically arranged, and the upper end of the return pipe 2 forms a closed end.

[0036] A drive motor 71 is fixed to the upper end of the return pipe 2. The output shaft of the drive motor 71 is downwardly fixed to the drive shaft 7. The drive shaft 7 is coaxially arranged with the return pipe 2. A return hopper 22 is fixed to one side of the upper part of the return pipe 2 and is connected to the feed hopper of the rod mill.

[0037] A second spiral guide plate 21 is installed in the return pipe 2. The second spiral guide plate 21 is clearance-matched with the inner side of the return pipe 2. The drive shaft 7 is fixed to the second spiral guide plate 21. When the second spiral guide plate 21 rotates, the material in the transfer box 8 is sent back to the rod mill. When the first spiral guide plate 11 rotates, the material in the bar screen drum 1 is transported to the transfer box 8.

[0038] Based on the above structure, when the rod mill (the rod mill in this embodiment is an existing device for peripheral side discharge in the prior art) is rotating and discharging, the drive motor 71 is turned on, and the bar screen drum 1 rotates accordingly under the action of the driving gear, so that the material entering the bar screen drum 1 from the rod mill discharge hopper 9 is screened and conveyed. The large-particle material passes through the bar screen drum 1 and enters the transfer box 8. Under the rotation action of the second spiral guide plate 21, it enters the return pipe 2, rises along the return pipe 2, is discharged from the return hopper 22, and enters the feed hopper of the rod mill, thereby completing the screening and return operation of the material, which also reduces the workload of the staff and the risks brought by manual shoveling, so that the environment around the mill and the hygiene of the equipment are well maintained, and a good working environment is created for the employees. In addition, it can also reduce the changes to the existing rod mill and is suitable for large-scale promotion and use.

[0039] Furthermore, the spiral gap of the second spiral guide plate 21 is the same as the spiral gap of the first spiral guide plate 11. The lower end of the second spiral guide plate 21 extends to the bottom of the return pipe 2, and there is a gap between the lower end of the second spiral guide plate 21 and the inner bottom wall of the transfer box 8, which makes it easier for the second spiral guide plate 21 to lift the material upward.

[0040] In addition, in other embodiments, the inner bottom wall of the transfer box 8 may also be configured to be a bucket shape with a downwardly protruding middle portion (not shown in the figure), and the second spiral guide plate 21 and the return pipe 2 both extend into the middle groove of the inner bottom wall of the transfer box 8, so that the second spiral guide plate 21 and the return pipe 2 can cooperate better to realize the operation of returning materials.

[0041] It should be further explained that the technical features such as the drive motor and support ring frame involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional options in the field and should not be regarded as the inventive point of this utility model patent. This utility model patent will not be further elaborated.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rod mill low-temperature ore safety discharge device, comprising a rod mill discharge hopper (9), characterized in that: A strip screen drum (1) is installed at the end of the rod mill discharge hopper (9), a first spiral guide plate (11) is fixed in the strip screen drum (1), a temporary storage box for temporarily storing materials is installed at the discharge end of the strip screen drum (1), a return pipe (2) is inserted into the temporary storage box, a second spiral guide plate (21) is installed in the return pipe (2), and the second spiral guide plate (21) returns the materials in the temporary storage box to the rod mill when it rotates; When the first spiral guide plate (11) rotates, the material in the screen drum (1) is transported into the temporary storage box.

2. The rod mill low-temperature ore safe discharge device according to claim 1, characterized in that: The strip screen drum (1) is fixed to the rod mill discharge hopper (9) via a connector (6); the rod mill discharge hopper (9) is a cylindrical body coaxially arranged with the rod mill; the second spiral guide plate (21) is fixed to the inner wall of the return pipe (2); the outer side of the return pipe (2) is fixed to the inner side of the strip screen drum (1) via a fixing rod; and the return pipe (2) is coaxially arranged with the strip screen drum (1).

3. The rod mill low-temperature ore safe discharge device according to claim 2, characterized in that: One end of the return pipe (2) extends into the rod mill, the second spiral guide plate (21) has a spiral direction opposite to that of the first spiral guide plate (11), and the spiral gap of the second spiral guide plate (21) is larger than the spiral gap of the first spiral guide plate (11).

4. The rod mill low-temperature ore safe discharge device according to claim 3, characterized in that: The temporary storage box includes a folding box (3), the folding box (3) is located at one end of the bar screen drum (1) away from the rod mill discharge hopper (9) and is fixed to the bar screen drum (1) by bolts, the end of the folding box (3) away from the bar screen drum (1) forms a closed end, and the other end of the return pipe (2) extends into the folding box (3); Wherein, a support ring frame (5) is rotatably sleeved on the outside of the folding box (3), the lower end of which is fixed to the ground via a bracket.

5. The rod mill low-temperature ore safe discharge device according to claim 4, characterized in that: A material blocking cone (4) is fixed in the middle of the folding box (3), and the material blocking cone (4) is coaxially arranged with the return pipe (2), and the cone head end of the material blocking cone (4) extends into the return pipe (2).

6. The rod mill low-temperature ore safe discharge device according to claim 1, characterized in that: The bar screen drum (1) is rotatably connected to the tail end of the rod mill discharge hopper (9) through a bearing. The rod mill discharge hopper (9) is a circular tube whose upper end corresponds to the discharge port below the rod mill. A driven gear ring (12) is fixed to the outside of the bar screen drum (1). The driven gear ring (12) is connected to the driving gear of the rod mill. The temporary storage box includes a transfer box (8), one side of the transfer box (8) is rotatably connected and communicated with the tail end of the bar screen drum (1) away from the rod mill discharge hopper (9), the lower end of the return pipe (2) is fixedly passed through the transfer box (8) and extends to the lower part of the transfer box (8), the second spiral guide plate (21) is clearance-matched with the inner side of the return pipe (2), the return pipe (2) is vertically arranged, and the upper end of the return pipe (2) forms a closed end, the upper end of the return pipe (2) is fixed with a drive motor (71), the output shaft of the drive motor (71) is downwardly fixed with a drive shaft (7), the drive shaft (7) is fixed with the second spiral guide plate (21), the drive shaft (7) is coaxially arranged with the return pipe (2), and one side of the upper part of the return pipe (2) is fixed with a return hopper (22), and the return hopper (22) is communicated with the feed hopper of the rod mill.

7. The rod mill low-temperature ore safe discharge device according to claim 6, characterized in that: The spiral gap of the second spiral guide plate (21) is the same as the spiral gap of the first spiral guide plate (11), the lower end of the second spiral guide plate (21) extends below the return pipe (2), and there is a gap between the lower end of the second spiral guide plate (21) and the inner bottom wall of the transfer box (8).

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