Noise-reducing continuous sieve mill

Abstract

The utility model belongs to mineral processing equipment technical field especially is related to a kind of continuous screening ball mill of noise reduction type, including support one, support two, ball mill roller, soundproof cover and feeding assembly and discharge assembly, support one and support two are fixedly provided with powder collecting box between, the top of powder collecting box is fixedly provided soundproof cover by screw, ball mill roller is rotatably arranged between powder collecting box and soundproof cover, the outer wall of ball mill roller is fixedly provided with screen frame by screw, the middle part of screen frame is fixedly provided with multiple reinforcing rib of fixed interval arrangement, manganese steel screen is fixedly arranged between screen frame and reinforcing rib;The device realizes on-line continuous screening function by manganese steel screen, effectively solves the problem of excessive grinding caused by traditional ball mill all material mixing grinding, unable to separate on-line, while three-layer composite soundproof cover structure is used to reduce the noise pollution generated by the collision of steel ball and roller wall.

Description

Technical Field

[0001] This utility model belongs to the technical field of mineral processing equipment, and in particular relates to a noise-reducing continuous screening ball mill. Background Technology

[0002] Ball mills are commonly used grinding equipment in mineral processing. They break down mineral particles through the impact and grinding action of grinding media (such as steel balls). Currently, most ball mills on the market consist of a frame, grinding drum, drive mechanism, feeding mechanism, and discharge mechanism. During operation, the drive mechanism drives the grinding drum to rotate at a constant speed. Ore material enters through the feeding mechanism, is ground by the grinding media inside the grinding drum, and is then discharged through the discharge mechanism.

[0003] However, during operation, the constant collisions between the steel balls and the drum wall of a ball mill generate tremendous noise, which can damage the hearing of operators and cause serious noise pollution to the surrounding environment. Secondly, lacking a built-in grading and separation function, traditional ball mills operate on a continuous feeding and timed discharge basis. All materials are mixed and ground inside the drum, making it impossible to separate materials of different particle sizes online. This leads to over-grinding of already qualified materials: fine powder that has reached the target particle size cannot be separated in time and continues to be ground together with coarse particles, resulting in over-grinding. This not only consumes extra energy but may also affect product performance. Utility Model Content

[0004] In view of the technical problems existing in the background art, this utility model provides a noise-reducing continuous screening ball mill.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: A noise-reducing continuous screening ball mill includes a support one and a support two. A powder collection box is fixedly installed between the support one and the support two. A sound insulation cover is fixedly installed on the top of the powder collection box by screws. A ball milling drum is rotatably installed between the powder collection box and the sound insulation cover. A screen frame is fixedly installed on the outer wall of the ball milling drum by screws. Multiple reinforcing ribs with fixed spacing are fixedly installed in the middle of the screen frame. A manganese steel screen is fixedly installed between the screen frame and the reinforcing ribs. The ball mill drum has a feeding assembly and a discharging assembly at both ends, and a drive mechanism for driving the ball mill drum to rotate is fixedly connected to the top of the support.

[0006] Optionally, a discharge pipe is fixedly connected to the bottom of the powder collection box, and a discharge valve is fixedly installed on the discharge pipe. Both ends of the powder collection box and the soundproof cover are provided with opposing annular grooves. Two sliding sealing rings are fixedly connected to the outer wall of the ball mill drum, and the sliding sealing rings match the annular grooves.

[0007] Optionally, the soundproof enclosure includes an outer cover, on the inner side of which a polyurethane foam layer is fixedly disposed, and on the inner side of which a stainless steel layer is fixedly disposed, and the stainless steel layer is rotatably connected to the outer wall of the ball mill drum.

[0008] Optionally, the drive mechanism includes a drive motor fixedly connected to the support, a gearbox fixedly mounted on the output end of the drive motor, a drive gear fixedly mounted on the output end of the gearbox, the output end of the gearbox being rotatably connected to the support via a bearing, and a driven gear ring meshing with the outer end of the drive gear, the driven gear ring being fixedly connected to the ball mill drum.

[0009] Optionally, the feeding assembly is rotatably connected to the ball mill drum via a rotating flange. The feeding assembly includes a feeding cylinder fixedly connected to the support. A feeding motor is fixedly installed at one end of the feeding cylinder. A feeding auger located inside the feeding cylinder is fixedly installed at the output end of the feeding motor. An ore hopper is fixedly connected to the top of the feeding cylinder. Support frames are fixedly connected to both sides of the ore hopper. The support frames are fixedly installed at the top of the support.

[0010] Optionally, the discharge assembly is rotatably connected to the ball mill drum via a rotating flange. The discharge assembly includes a tailings guide cylinder and a tailings discharge hood fixedly installed at one end of the tailings guide cylinder. The bottom of the tailings discharge hood is fixedly connected to a tailings channel. The tailings guide cylinder is equipped with a shaftless auger, which is fixedly connected to the ball mill drum.

[0011] Optionally, multiple evenly distributed ball-pushing baffles are fixedly installed on the inner side wall of the ball mill drum, and multiple grinding balls are arranged between the multiple ball-pushing baffles. A barrier is fixedly installed on the side of the ball mill drum near the tailings guide pipe.

[0012] This utility model has the following advantages and beneficial effects: In this invention, a manganese steel screen is used to achieve online continuous screening. Fine powder that reaches the target particle size can be separated through the screen in a timely manner and collected in a powder collection box. Materials that do not meet the standard continue to be ground in the ball mill drum. This effectively solves the problem of over-grinding caused by the mixing and grinding of all materials in traditional ball mills and the inability to separate them online. The invention also adopts a three-layer composite sound insulation cover structure. The outer cover provides structural support, the polyurethane foam layer effectively absorbs sound wave energy, and the stainless steel layer reduces static electricity. This reduces noise pollution caused by the collision of steel balls with the drum wall and improves the product quality and production efficiency of mineral processing. Attached Figure Description

[0013] Figure 1 This is an overall structural diagram of the noise-reducing continuous screening ball mill of this utility model; Figure 2 This is a schematic diagram of the sealing mechanism of this utility model; Figure 3 This is a partial view of the noise-reducing continuous screening ball mill of this utility model. Figure 1 ; Figure 4 This is a longitudinal sectional view of the ball mill cylinder of this utility model. Figure 1 ; Figure 5 This is a schematic diagram of the structure of the soundproof cover of this utility model.

[0014] Reference numerals: 1. Support 1; 2. Support 2; 3. Powder collection box; 4. Soundproof cover; 401. Outer cover; 402. Polyurethane foam layer; 403. Stainless steel layer; 5. Ball mill drum; 6. Screen frame; 7. Reinforcing ribs; 8. Manganese steel screen; 9. Discharge pipe; 10. Annular groove; 11. Sliding sealing ring; 12. Drive motor; 13. Gearbox; 14. Drive gear; 15. Driven gear ring; 16. Switch panel; 17. Feeding cylinder; 18. Feeding motor; 19. Feeding auger; 20. Ore hopper; 21. Support frame; 22. Tailings guide cylinder; 23. Tailings discharge hood; 24. Tailings channel; 25. Shaftless auger; 26. Ball pusher bar; 27. Grinding ball; 28. Barrier. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] Example like Figures 1-5 As shown, a noise-reducing continuous screening ball mill includes a support 1, a support 2, a ball mill drum 5, a soundproof cover 4, a feeding assembly, a discharging assembly, and a drive mechanism. Supports 1 and 2 provide stable support for the entire machine. The ball mill drum 5 rotates under the drive mechanism to grind materials. The feeding assembly continuously feeds raw materials into the ball mill drum 5. The screen assembly in the middle of the ball mill drum 5 performs online screening. Qualified powder is collected in a powder collection box, while substandard material is discharged through the discharging assembly. The entire working process is carried out within the soundproof cover 4, effectively reducing noise pollution.

[0018] like Figures 1-3As shown, a powder collection box 3 is fixedly installed between support 1 and support 2. The powder collection box 3 adopts a rectangular container structure for easy powder collection and cleaning. A soundproof cover 4 is fixed to the top of the powder collection box 3 with screws, which facilitates subsequent disassembly, maintenance, and screen replacement. A ball mill roller 5 is rotatably installed between the powder collection box 3 and the soundproof cover 4. A screen frame 6 is fixed to the outer wall of the ball mill roller 5 with screws. Multiple reinforcing ribs 7 with fixed spacing are fixedly installed in the middle of the screen frame 6. A manganese steel screen 8 is fixed between the screen frame 6 and the reinforcing ribs 7. The manganese steel screen 8 can be replaced according to different particle size requirements to achieve continuous screening.

[0019] The manganese steel screen 8 can be replaced with a screen of appropriate aperture according to the actual particle size requirements of mineral crushing. During the entire ball milling process, powder with the required particle diameter will pass through the screen and enter the powder collection box 3 for unified collection, while powder with the required diameter will continue to be ground in the ball mill. This avoids the cumbersome steps of secondary screening and separation required for one-time discharge, and can achieve the effect of consistent particle size of the target powder.

[0020] A discharge pipe 9 is fixedly connected to the bottom of the powder collection box 3, and a discharge valve is fixedly installed on the discharge pipe 9. Both ends of the powder collection box 3 and the soundproof cover 4 have opposing annular grooves 10. Two sliding sealing rings 11 are fixedly connected to the outer wall of the ball mill drum 5, and the sliding sealing rings 11 fit tightly with the annular grooves 10. The matching of the sliding sealing rings 11 and the annular grooves 10 forms a reliable sealing structure, ensuring the free rotation of the ball mill drum 5 while preventing dust leakage and maintaining a good working environment.

[0021] like Figure 2 and Figure 5 As shown, the soundproof cover 4 includes an outer cover 401, on the inner side of which a polyurethane foam layer 402 is fixedly disposed. The polyurethane foam layer 402 has a moderate density and excellent sound absorption performance. A stainless steel layer 403 is fixedly disposed on the inner side of the polyurethane foam layer 402. The stainless steel layer 403 is rotatably connected to the outer wall of the ball mill roller 5 to form a smooth inner surface.

[0022] This three-layer composite structure design achieves the functions of outer protection, middle sound insulation, and inner reinforcement. The outer cover 401 provides structural support, the polyurethane foam layer 402 effectively absorbs sound wave energy and reduces noise, and the stainless steel layer 403 reduces static electricity generation, facilitates powder slippage, and improves powder flowability.

[0023] like Figure 1As shown, the drive mechanism includes a drive motor 12 fixedly connected to the support 1. A gearbox 13 is fixedly installed at the output end of the drive motor 12. A drive gear 14 is fixedly installed at the output end of the gearbox 13. The output end of the gearbox 13 is rotatably connected to the support 1 through a bearing. A driven gear ring 15 meshes with the outer end of the drive gear 14. The driven gear ring 15 is fixedly connected to the ball mill drum 5.

[0024] like Figure 1 As shown, a switch panel 16 is fixedly installed on the front of the support 1. A feeding switch, a grinding switch and a discharge switch are fixedly installed on the surface of the switch panel 16. The feeding switch controls the start and stop of the feeding component, the grinding switch controls the forward and reverse rotation of the drive motor 12, and the discharge switch controls the operation of the discharge component. Each switch has a clear function and is easy to operate.

[0025] The feeding assembly is rotatably connected to the ball mill drum 5 via a rotating flange. The rotating flange adopts a standard flange structure, ensuring a reliable connection. The feeding assembly includes a feeding cylinder 17 fixedly connected to the support 1. The feeding cylinder 17 is a circular pipe structure with a smooth inner wall to reduce material adhesion. A feeding motor 18 is fixedly installed at one end of the feeding cylinder 17. A feeding auger 19, which is a spiral structure, is fixedly installed inside the feeding cylinder 17 at the output end of the feeding motor 18.

[0026] The top of the feeding cylinder 17 is fixedly connected to an ore hopper 20, which has a conical structure to facilitate material flow. Support frames 21 are fixedly connected to both sides of the ore hopper 20, and are fixedly mounted on the top of the support 1 to provide reliable support for the hopper. The feeding motor 18 is electrically connected to an external power supply via a feeding switch to achieve precise control of the feeding process.

[0027] like Figure 4 As shown, the discharge assembly is rotatably connected to the ball mill drum 5 via a rotating flange. The discharge assembly includes a tailings guide cylinder 22 and a tailings discharge hood 23 fixedly installed at one end of the tailings guide cylinder 22. The bottom of the tailings discharge hood 23 is fixedly connected to a tailings channel 24, which is connected to the tailings collection system. A shaftless auger 25 is installed inside the tailings guide cylinder 22 and is fixedly connected to the ball mill drum 5. The shaftless auger 25 has a spiral blade structure and a design without a central shaft, suitable for conveying viscous materials. The shaftless auger 25 rotates clockwise together with the ball mill drum 5. During the ball milling process, the shaftless auger 25 pushes the material entering the tailings guide cylinder 22 back into the ball mill drum 5 for further grinding. During the discharge process, the ball mill drum 5 is controlled to rotate counterclockwise, causing the ball mill drum 5 to drive the shaftless auger 25 to rotate counterclockwise and push the tailings out.

[0028] like Figure 4As shown, a plurality of evenly distributed ball-pushing baffles 26 are fixedly arranged on the inner sidewall of the ball milling drum 5. The ball-pushing baffles 26 are made of wear-resistant steel plate, have a strip-shaped structure, and extend along the axial direction of the ball milling drum 5. A plurality of grinding balls 27 are arranged between the plurality of ball-pushing baffles 26.

[0029] The design of the ball pusher 26 allows the grinding balls 27 to be lifted to an appropriate height when the ball mill drum 5 rotates, and then fall freely to impact and crush the material. A baffle 28 is fixedly installed on the side of the ball mill drum 5 near the tailings guide cylinder 22. The baffle 28 plays a blocking and guiding role to prevent the grinding balls 27 from entering the discharge assembly and ensure the safe operation of the system.

[0030] Working principle: During operation, the operator adds the ore to be crushed into the ore hopper 20 and starts the feeding motor 18 through the feeding switch. The feeding motor 18 drives the feeding auger 19 to rotate inside the feeding cylinder 17. Under the action of gravity, the material in the ore hopper 20 continuously enters the feeding cylinder 17 and is pushed into the ball mill drum 5 by the feeding auger 19.

[0031] When the operator starts the drive motor 12 through the grinding switch, the drive motor 12 rotates forward. After being reduced in speed by the gearbox 13, it drives the drive gear 14 to move, which in turn drives the ball mill drum 5 to rotate clockwise through the driven gear ring 15.

[0032] After the ore enters the ball mill drum 5, it will tumble with the rotating ball mill drum 5 and collide with the grinding balls 27 inside the ball mill drum 5, thereby completing the crushing of the ore material. The ball pusher baffle 26 is only set on the side facing the manganese steel screen 8. It is used to increase the resistance of the grinding balls 27 when the ball mill drum 5 rotates, push them to a high place, and then fall down to complete the crushing of the ore.

[0033] The ball-pushing baffle 26 is not installed on the side near the manganese steel screen 8. When the manganese steel screen 8 moves to the bottom, the crushed ore powder will pass through the manganese steel screen 8 and enter the powder collection box 3 for temporary storage under the action of gravity. Because the ball-pushing baffle 26 is not installed at the manganese steel screen 8, the ore material and grinding balls 27 slide along the manganese steel screen 8 during movement, and there will be no large-scale phenomenon of falling from a height, thus increasing the service life of the manganese steel screen 8.

[0034] The ball pusher baffle 26 is inclined. When the ball mill drum 5 rotates clockwise, due to the inclination of the ball pusher baffle 26, the material and grinding balls 27 will be pushed away from the tailings guide cylinder 22. At the same time, the shaftless auger 25 will also push the material that has entered the tailings guide cylinder 22 back into the ball mill drum 5 for ball milling.

[0035] The ball mill roller 5 is rotatably connected to the powder collection box 3 and the soundproof cover 4 via a sliding sealing ring 11. During ball milling, the powder screened out slides into the powder collection box 3 under gravity. Both the powder collection box 3 and the soundproof cover 4 are made of three layers: an outer protective layer for support, a middle sound insulation layer (using polyurethane foam 402 to dissipate sound wave energy), and an inner reinforcement layer made of stainless steel to reduce electrostatic dust accumulation. The powder slides down the smooth inner layer for collection.

[0036] The soundproof cover 4 can be completely removed from the powder collection box 3 by screws, which facilitates subsequent maintenance and cleaning, and replacement with a manganese steel screen 8 of appropriate mesh diameter.

[0037] When tailings need to be discharged, the ball mill drum 5 rotates counterclockwise. At this time, under the push of the shaftless auger 25, the material will continuously enter the tailings discharge hood 23 and be discharged through the tailings channel 24.

[0038] During ball milling, workers periodically push the material cart under the powder collection box 3 and open the discharge valve on the discharge pipe 9 to discharge the crushed target powder. After crushing is completed, the drive motor 12 is reversed by controlling the discharge switch to complete the discharge operation.

[0039] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A noise-reducing continuous screening ball mill, comprising support one (1) and support two (2), characterized in that: A powder collection box (3) is fixedly installed between the first support (1) and the second support (2). A soundproof cover (4) is fixedly installed on the top of the powder collection box (3) by screws. A ball milling drum (5) is rotatably installed between the powder collection box (3) and the soundproof cover (4). A screen frame (6) is fixedly installed on the outer wall of the ball milling drum (5) by screws. A plurality of reinforcing ribs (7) with fixed spacing are fixedly installed in the middle of the screen frame (6). A manganese steel screen (8) is fixedly installed between the screen frame (6) and the reinforcing ribs (7). The ball milling drum (5) is provided with a feeding assembly and a discharging assembly at both ends, and the top of the support (1) is fixedly connected to a driving mechanism for driving the ball milling drum (5) to rotate.

2. The noise-reducing continuous screening ball mill according to claim 1, characterized in that: The bottom of the powder collection box (3) is fixedly connected to the discharge pipe (9), and the discharge pipe (9) is fixedly installed with a discharge valve. Both ends of the powder collection box (3) and the soundproof cover (4) are provided with annular grooves (10) facing each other. The outer wall of the ball mill roller (5) is fixedly connected with two sliding sealing rings (11), and the sliding sealing rings (11) match the annular grooves (10).

3. The noise-reducing continuous screening ball mill according to claim 1, characterized in that: The soundproof cover (4) includes an outer cover (401), on the inner side of the outer cover (401) a polyurethane foam layer (402) is fixedly provided, and on the inner side of the polyurethane foam layer (402) a stainless steel layer (403) is fixedly provided, and the stainless steel layer (403) is rotatably connected to the outer wall of the ball mill roller (5).

4. The noise-reducing continuous screening ball mill according to claim 1, characterized in that: The drive mechanism includes a drive motor (12) fixedly connected to the support (1). A gearbox (13) is fixedly installed at the output end of the drive motor (12). A drive gear (14) is fixedly installed at the output end of the gearbox (13). The output end of the gearbox (13) is rotatably connected to the support (1) through a bearing. A driven gear ring (15) meshes with the outer end of the drive gear (14). The driven gear ring (15) is fixedly connected to the ball mill drum (5).

5. The noise-reducing continuous screening ball mill according to claim 1, characterized in that: The feeding assembly is rotatably connected to the ball mill drum (5) via a rotating flange. The feeding assembly includes a feeding cylinder (17) fixedly connected to the support (1). A feeding motor (18) is fixedly installed at one end of the feeding cylinder (17). A feeding auger (19) located inside the feeding cylinder (17) is fixedly installed at the output end of the feeding motor (18). An ore hopper (20) is fixedly connected to the top of the feeding cylinder (17). A support frame (21) is fixedly connected to both sides of the ore hopper (20). The support frame (21) is fixedly installed at the top of the support (1).

6. The noise-reducing continuous screening ball mill according to claim 1, characterized in that: The discharge assembly is rotatably connected to the ball mill drum (5) via a rotating flange. The discharge assembly includes a tailings guide cylinder (22) and a tailings discharge hood (23) fixedly installed at one end of the tailings guide cylinder (22). The bottom of the tailings discharge hood (23) is fixedly connected to a tailings channel (24). The tailings guide cylinder (22) is equipped with a shaftless auger (25), and the shaftless auger (25) is fixedly connected to the ball mill drum (5).

7. The noise-reducing continuous screening ball mill according to claim 1, characterized in that: The inner wall of the ball mill drum (5) is fixedly provided with a plurality of evenly distributed ball pushing baffles (26), and a plurality of grinding balls (27) are provided between the plurality of ball pushing baffles (26). A guard (28) is fixedly provided on the side of the ball mill drum (5) near the tailings guide cylinder (22).

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