A ball mill ball charging apparatus

Abstract

The utility model provides a kind of ball mill ball adding equipment, belong to mine grinding equipment technical field, including first ball adding mechanism and second ball adding mechanism, first ball adding mechanism and second ball adding mechanism are arranged side by side, and there is convergence bucket between first ball adding mechanism and second ball adding mechanism;The first ball adding mechanism includes rack, ball bin, lifting device and conveying device, ball bin, lifting device and conveying device are all fixed on rack, wherein lifting device is located between ball bin and conveying device;The conveying device is fixed on rack by support rod, and there is weighing sensor between conveying device and support rod.The utility model can control the adding order and quantity of large and small steel balls, ensure the accurate replenishment of steel balls, thereby effectively improve the grinding effect of ball mill and improve production efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of mining grinding equipment, and in particular relates to a ball mill ball adding device. Background Technology

[0002] In the mineral processing and grinding process, the ball mill is one of the key pieces of equipment, and its working efficiency directly affects the efficiency and quality of the entire process. The ball mill achieves grinding operations by adding grinding media inside. The grinding media is mainly steel balls. During operation, the appropriate gradation of the grinding media (steel balls) directly affects the equipment's efficiency. Only by ensuring a certain proportion of various balls can they be matched with the particle size distribution of the material being ground, thus achieving good grinding results.

[0003] Existing ball mills are all equipped with ball feeders. When the steel balls in the ball mill wear out due to continuous operation, the ball feeder needs to add steel balls of different sizes regularly according to process requirements to maintain the gradation of steel balls in the ball mill, thereby ensuring the grinding effect.

[0004] Currently, there are two methods for replenishing the steel balls worn in ball mills. One method involves using a claw-type or rotary ball feeder to mix pre-configured balls of different sizes into the ball chamber, replenishing them at intervals. This method requires manual measurement of the number of balls of different sizes beforehand, and the order and quantity of balls added cannot be controlled during the process. The other method involves using a magnetic ball feeder to add steel balls in categories, with the amount of balls added measured by weight. However, the uneven surface of the steel balls in the chamber can cause the electromagnet to pick up different numbers of balls each time. Furthermore, the weighing process during electromagnet transfer has significant errors and inaccuracies, making it impossible to achieve uniform and precise addition of steel balls of different sizes. Utility Model Content

[0005] In view of the defects or deficiencies in the existing technology, this utility model provides a ball mill ball feeding device that can control the order and quantity of adding steel balls of different sizes, ensuring accurate replenishment of steel balls, thereby effectively improving the grinding effect of the ball mill and increasing production efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An embodiment of this utility model provides a ball mill ball adding device, including... The first ball-adding mechanism and the second ball-adding mechanism are arranged side by side, and a converging bucket is provided between the first ball-adding mechanism and the second ball-adding mechanism; The first ball-adding mechanism includes a frame, a ball bin, a lifting device, and a conveying device. The ball bin, the lifting device, and the conveying device are all fixed on the frame, wherein the lifting device is located between the ball bin and the conveying device. The conveying device is fixed to the frame by a support rod, and a weighing sensor is installed between the conveying device and the support rod.

[0007] Furthermore, the top and bottom of the collecting hopper are both open, with the top opening facing the ball inlets of the first and second ball feeding mechanisms, and the bottom opening facing the ball mill inlet.

[0008] Furthermore, the bottom surface of the ball chamber is inclined towards the side of the lifting device, and a ball outlet is provided at the bottom of the side wall of the ball chamber near the lifting device where it meets the bottom surface of the ball chamber.

[0009] Furthermore, the lifting device is a scissor lift platform, including a base plate, a top plate, and two symmetrically arranged telescopic frames. The two telescopic frames are spaced a set distance apart, and the top plate is located at the top and bottom of the telescopic frames, respectively.

[0010] Furthermore, the lifting device is tilted and fixed between the ball chamber and the conveying device, and its tilt angle with the horizontal plane is the same as the tilt angle between the bottom surface of the ball chamber and the horizontal plane.

[0011] Furthermore, side baffles are provided on both sides of the lifting device, and a front baffle is provided on the side of the lifting device closer to the conveying device. Both the side baffles and the front baffle are fixedly connected to the frame, wherein the front baffle is inclined.

[0012] Furthermore, the conveying device includes a driving roller and a driven roller, with a conveyor belt drivingly connecting the driving roller and the driven roller. The two ends of the driving roller and the driven roller are respectively rotatably connected to side plates located on both sides of the driving roller and the driven roller.

[0013] Furthermore, there are two support rods, which are arranged parallel to each other below the conveying device and are perpendicular to the two side plates. The length of the support rods is greater than the distance between the two side plates, so that the bottom ends of the two side plates can be placed on the two support rods. One end of each support rod is fixed to the frame.

[0014] Furthermore, the collecting hopper is placed at the end of the conveyor belt.

[0015] Furthermore, a controller is also fixed on the frame. The controller is electrically connected to the drive motor, the weighing sensor, and the solenoid valves that control the first and second hydraulic cylinders. The controller is also communicatively connected to the control system of the ball mill.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model sets up a first ball-adding mechanism and a second ball-adding mechanism, and sets up a collecting hopper at the ball drop outlet between the first ball-adding mechanism and the second ball-adding mechanism. The first ball-adding mechanism and the second ball-adding mechanism are respectively filled with steel balls of different diameters. According to the needs of the ball mill, steel balls of different diameters can be added to the ball mill through the first ball-adding mechanism and the second ball-adding mechanism, thereby controlling the order and quantity of adding large and small balls and improving the grinding efficiency of the ball mill.

[0017] 2. This utility model has a weighing sensor installed at the bottom of the conveying device of both the first and second ball-adding mechanisms. The weight of the steel balls on the two conveying devices can be measured respectively. By controlling the speed and running time of the two conveying devices, the diameter and quantity of the added steel balls can be guaranteed, thereby ensuring the accurate addition of steel balls. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the ball-adding device in an embodiment of the present invention; Figure 2 This is a diagram showing the internal structure of the ball-adding device in an embodiment of this utility model; Figure 3 This is a schematic diagram of the lifting device structure in an embodiment of the present utility model; The components include: 1. First ball-adding mechanism; 2. Second ball-adding mechanism; 3. Converging hopper; 4. Frame; 5. Ball compartment; 6. Lifting device; 601. Base plate; 602. Top plate; 603. First connecting rod; 604. Second connecting rod; 605. First upper crossbeam; 606. First lower crossbeam; 607. First roller; 608. Second roller; 609. Fixing rod; 610. First hydraulic cylinder; 611. Second hydraulic cylinder; 612. Positioning hole; 7. Conveying device; 701. Driving roller; 702. Driven roller; 703. Conveyor belt; 704. Side plate; 705. Reducer; 706. Drive motor; 8. Side baffle; 9. Front baffle; 10. Support rod; 11. Weighing sensor; 12. Controller; 13. Rear baffle. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] A typical embodiment of this utility model is as follows: Figure 1 As shown, a ball mill ball feeding device includes a first ball feeding mechanism 1 and a second ball feeding mechanism 2, which are arranged side by side. A converging hopper 3 is provided between the first ball feeding mechanism 1 and the second ball feeding mechanism 2. The top and bottom of the converging hopper 3 are open. The top opening of the converging hopper 3 is directly opposite the ball dropping port of the first ball feeding mechanism 1 and the second ball feeding mechanism 2, and the bottom opening of the converging hopper 3 is directly opposite the ball inlet of the ball mill.

[0021] During use, the first ball-adding mechanism 1 and the second ball-adding mechanism 2 are respectively filled with steel balls of different diameters. Steel balls of different diameters can be added to the ball mill through the first ball-adding mechanism 1 and the second ball-adding mechanism 2 according to the needs of the ball mill, thereby improving the grinding efficiency of the ball mill.

[0022] The first ball-adding mechanism 1 and the second ball-adding mechanism 2 have the same structure. Only the first ball-adding mechanism 1 will be described here. Figure 2 As shown, the first ball-adding mechanism 1 includes a frame 4, a ball bin 5, a lifting device 6, and a conveying device 7. The ball bin 5, the lifting device 6, and the conveying device 7 are all fixed on the frame 4. The lifting device 6 is located between the ball bin 5 and the conveying device 7. The ball bin 5 is used to hold steel balls. The lifting device 6 transports the steel balls from the ball bin 5 to the conveying device 7. The conveying device 7 transports the steel balls to the ball drop port and they fall into the ball mill through the collecting hopper 3 below the ball drop port.

[0023] Specifically, a ball filling port is provided at the top of the ball chamber 5. The steel ball enters the ball chamber 5 through the ball filling port at the top of the ball chamber 5. The bottom surface of the ball chamber 5 is an inclined surface relative to the horizontal plane. In this embodiment, the bottom surface of the ball chamber 5 forms an angle of 10° to 20° with the horizontal plane, and the bottom surface of the ball chamber 5 is inclined to the side of the lifting device 6. A ball exit port is provided at the bottom of the side wall of the ball chamber 5 near the lifting device 6 where it connects with the bottom surface of the ball chamber 5. The steel ball that enters the ball chamber 5 can roll out from the ball exit port under the action of the bottom surface of the ball chamber 5.

[0024] Furthermore, to prevent steel balls from accumulating at the ball outlet and blocking it, a vibrator is fixed on the side wall of the ball chamber 5. When the ball is not falling smoothly, the ball chamber 5 can be vibrated by the vibrator to assist in the ball falling. The vibrator is a common vibrator on the market.

[0025] Lifting device 6 is a scissor lift platform, such as... Figure 3 As shown, it includes a base plate 601, a top plate 602, and two symmetrically arranged telescopic frames. The two telescopic frames are spaced a set distance apart. The top plate 602 and the base plate 601 are located at the top and bottom of the telescopic frames, respectively. The telescopic frames are used to drive the top plate 602 to rise and fall.

[0026] The telescopic frame includes a first connecting rod 603 and a second connecting rod 604. The first connecting rod 603 and the second connecting rod 604 are arranged crosswise, and the middle parts of the first connecting rod 603 and the middle parts of the second connecting rod 604 are hinged together. The top ends of the two first connecting rods 603 are connected by a first upper crossbeam 605, and the bottom ends of the two first connecting rods 603 are connected by a first lower crossbeam 606. The top ends of the two second connecting rods 604 are connected by a second upper crossbeam, and the bottom ends of the two second connecting rods 604 are connected by a second lower crossbeam.

[0027] The bottom end of the first connecting rod 603 is hinged to the bottom plate 601, and the top end of the first connecting rod 603 is provided with a first roller 607. The first roller 607 is slidably connected to a first guide rail provided on the bottom surface of the top plate 602. The top end of the second connecting rod 604 is hinged to the bottom surface of the top plate 602, and the bottom end of the second connecting rod 604 is provided with a second roller 608. The second roller 608 is slidably connected to a second guide rail provided on the top surface of the bottom plate 601.

[0028] Fixed rods 609 are fixedly connected to the middle of the opposite sides of the two second connecting rods 604. The top of the fixed rod 609 is connected to the first lower crossbeam 606 through a first hydraulic cylinder 610. The two ends of the first hydraulic cylinder 610 are hinged to the fixed rod 609 and the first lower crossbeam 606 respectively. The bottom of the fixed rod 609 is connected to the first upper crossbeam 605 through a second hydraulic cylinder 611. The two ends of the second hydraulic cylinder 611 are hinged to the fixed rod 609 and the first upper crossbeam 605 respectively. Thus, the top plate 602 is raised and lowered by the first hydraulic cylinder 610 and the second hydraulic cylinder 611.

[0029] Both the first hydraulic cylinder 610 and the second hydraulic cylinder 611 are supplied with hydraulic oil by a hydraulic pump, and their movement is controlled by a solenoid valve. This is prior art and will not be described in detail again.

[0030] The lifting device 6 is tilted and fixed between the ball chamber 5 and the conveying device 7. Its tilt angle with the horizontal plane is the same as the tilt angle between the bottom surface of the ball chamber 5 and the horizontal plane. When the top plate 602 of the lifting device 6 falls to the lowest position, the upper surface of the top plate 602 is flush with the bottom surface of the ball chamber 5. The steel balls in the ball chamber 5 can roll directly onto the upper surface of the top plate 602 through the ball outlet and be lifted by the lifting device 6 onto the conveying device 7.

[0031] Because the top surface of the lifting device 6 is inclined, in order to prevent the steel balls from falling when the lifting device 6 lifts the steel balls, side baffles 8 are provided on both sides of the lifting device 6. A front baffle 9 is provided on the side of the lifting device 6 closest to the conveying device 7. Both the side baffles 8 and the front baffle 9 are fixedly connected to the frame 4. The front baffle 9 is inclined. When the steel balls roll onto the top plate 602 of the lifting device 6, due to the inclination of the top plate 602 of the lifting device 6, the steel balls will roll on the side of the front baffle 9 and line up in a row along the front baffle 9. During the lifting, the steel balls are always in contact with the front baffle 9 until the top plate 602 of the lifting device 6 is higher than the conveying device 7, and the steel balls fall into the conveying device 7 in a row.

[0032] Because the width of the top plate 602 determines that only one row of steel balls can be lifted at most, the remaining steel balls will accumulate at the ball outlet, waiting to be lifted next time. Furthermore, a rear baffle 13 is provided on the side of the lifting device 6 near the ball outlet. The rear baffle 13 is arranged parallel to the front baffle 9. When the lifting device 6 is raised, the rear baffle 13 will move with the lifting device 6. The steel balls accumulated at the ball outlet will be blocked by the rear baffle 13 to prevent the steel balls from falling from the ball outlet. During the lifting process, if any of the steel balls that have been arranged in a row on the top plate 602 become loose, they can roll down to the ball pile at the ball outlet on their own, waiting to be lifted next time.

[0033] A positioning hole 612 is provided in the middle of the upper surface of the top plate 602. The positioning hole 612 is opened along the length of the top plate 602. The width of the positioning hole 612 is set according to the diameter of the steel ball, that is, the width of the positioning hole 612 is smaller than the diameter of the steel ball, and does not affect the rolling of the steel ball on the top plate 602. The steel balls falling on the top plate 602 can be arranged along the positioning hole 612. Steel slag and other impurities can fall from the positioning hole 612 to avoid affecting the subsequent weighing of the steel ball.

[0034] The conveying device 7 includes a drive roller 701 and a driven roller 702. A conveyor belt 703 is driven between the drive roller 701 and the driven roller 702. The two ends of the drive roller 701 and the driven roller 702 are rotatably connected to side plates 704 located on both sides of the drive roller 701 and the driven roller 702, respectively. The height of the side plates 704 is higher than the height of the upper surface of the conveyor belt 703, which can block the steel balls on the conveyor belt 703. At the same time, the surface of the conveyor belt 703 is provided with protrusions or grooves to ensure that the steel balls will not slip during the conveying process. One end of the drive roller 701 is connected in sequence to a reducer 705 and a drive motor 706. The drive motor 706 drives the drive roller 701 to rotate, which in turn drives the conveyor belt 703 to rotate. The drive motor 706 and the reducer 705 are fixed on the outer wall of the side plate 704.

[0035] The bottom of the two side plates 704 are fixedly connected to the frame 4 by support rods 10. Specifically, there are two support rods 10, which are arranged parallel to each other below the conveying device 7 and are perpendicular to the two side plates 704. The length of the support rods 10 is greater than the distance between the two side plates 704, so that the bottom ends of the two side plates 704 can be placed on the two support rods 10. One end of the support rod 10 is fixed to the frame 4, thereby supporting the conveying device 7.

[0036] Furthermore, a weighing sensor 11 is provided on the upper surface of the support rod 10. In this embodiment, the weighing sensor 11 is a common cantilever beam type sensor on the market. The bottom ends of both side plates 704 are in contact with the weighing sensor 11. The weighing sensor 11 can measure the total weight of the conveying device 7, and thus determine the weight of the steel ball falling onto the conveying device 7.

[0037] The collecting bucket 3 is placed at the end of the conveyor belt 703. The steel balls transported by the lifting device 6 fall onto the conveyor belt 703 and then fall into the collecting bucket 3 from the end of the conveyor belt 703.

[0038] A controller 12 is also fixed on the frame 1. The controller 12 is electrically connected to the drive motor 706, the weighing sensor 11, and the solenoid valves that control the first hydraulic cylinder 610 and the second hydraulic cylinder 611. The controller 12 is equipped with a touch screen, through which parameters such as the weight of the steel ball, the corresponding ball bin, and the conveying speed of the conveying device 7 can be pre-input. The controller 12 is connected to the control system of the ball mill via a signal line and can collect the amount of ore fed into the mill in real time based on the signal from the belt scale installed on the grinding feed belt of the ball mill.

[0039] The controller 12 calculates the appropriate diameter of steel balls and their corresponding weight to be added based on the ball consumption ratio provided by the mine, the addition ratio (gradation ratio) of steel balls of different diameters, and the collected grinding volume, using its built-in software.

[0040] The controller 12 detects the weight of the steel balls on the conveying device 7 through the weighing sensor 11, and controls the movement of the corresponding conveying device 7 according to the diameter and weight of the steel balls to be added, thereby adding steel balls into the ball mill. When all the steel balls on the conveying device 7 have been added, the controller 12 controls the lifting device 6 to lift the steel balls from the ball outlet of the ball chamber 5 to the conveying device 7 to continue adding. The controller 12 automatically controls the speed and running time of the conveying device 7 according to the set parameters, thereby ensuring the accurate delivery of steel balls.

[0041] By setting up a first ball-adding mechanism and a second ball-adding mechanism, and setting a collecting hopper at the ball drop outlet between the first ball-adding mechanism and the second ball-adding mechanism, and loading steel balls of different diameters into the first ball-adding mechanism and the second ball-adding mechanism respectively, steel balls of different diameters can be added into the ball mill according to the needs of the ball mill, thereby controlling the order and quantity of adding large and small balls and improving the grinding efficiency of the ball mill.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A ball mill ball feeding device, characterized in that, It includes a first ball-adding mechanism and a second ball-adding mechanism, which are arranged side by side, and a converging hopper is provided between the first ball-adding mechanism and the second ball-adding mechanism; The first ball-adding mechanism includes a frame, a ball bin, a lifting device, and a conveying device. The ball bin, the lifting device, and the conveying device are all fixed on the frame, wherein the lifting device is located between the ball bin and the conveying device. The conveying device is fixed to the frame by a support rod, and a weighing sensor is installed between the conveying device and the support rod.

2. The ball mill ball feeding device as described in claim 1, characterized in that, The top and bottom of the collecting hopper are both open. The top opening of the collecting hopper is directly opposite the ball drop inlets of the first and second ball adding mechanisms, and the bottom opening of the collecting hopper is directly opposite the ball inlet of the ball mill.

3. The ball mill ball feeding device as described in claim 1, characterized in that, The bottom surface of the ball chamber is inclined towards the lifting device, and a ball outlet is provided at the bottom of the side wall of the ball chamber near the lifting device where it meets the bottom surface of the ball chamber.

4. The ball mill ball feeding device as described in claim 1, characterized in that, The lifting device is a scissor lift platform, including a base plate, a top plate, and two symmetrically arranged telescopic frames. The two telescopic frames are spaced a set distance apart, and the top plate is located at the top and bottom of the telescopic frames, respectively.

5. The ball mill ball feeding device as described in claim 3, characterized in that, The lifting device is tilted and fixed between the ball chamber and the conveying device, and its tilt angle with the horizontal plane is the same as the tilt angle of the bottom surface of the ball chamber with the horizontal plane.

6. The ball mill ball feeding device as described in claim 5, characterized in that, The lifting device is provided with side baffles on both sides, and a front baffle is provided on the side of the lifting device closer to the conveying device. Both the side baffles and the front baffle are fixedly connected to the frame, and the front baffle is inclined.

7. The ball mill ball feeding device as described in claim 1, characterized in that, The conveying device includes a driving roller and a driven roller, and a conveyor belt is driven between the driving roller and the driven roller. The two ends of the driving roller and the driven roller are rotatably connected to the side plates located on both sides of the driving roller and the driven roller, respectively.

8. The ball mill ball feeding device as described in claim 7, characterized in that, Two support rods are provided, which are arranged parallel to each other below the conveying device and are perpendicular to the two side plates. The length of the support rods is greater than the distance between the two side plates, so that the bottom ends of the two side plates can be placed on the two support rods. One end of each support rod is fixed to the frame.

9. A ball mill ball-adding device as described in claim 7, characterized in that, The converging hopper is placed at the end of the conveyor belt.

10. A ball mill ball-adding device as described in claim 1, characterized in that, A controller is also fixed on the frame. The controller is electrically connected to the lifting device, the conveying device and the weighing sensor respectively. The controller is also communicatively connected to the control system of the ball mill.

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