Automatic ball feeding system of ball mill

Abstract

The utility model provides an automatic ball feeding system of a ball mill, which is characterized by comprising a ball storage pool, a ball taking device and a steel ball conveying and distributing device, the ball taking device is located on one side of the ball storage pool and comprises a mechanical arm and a guide rail, a steel ball capturing structure is arranged at the head end of the mechanical arm, and the mechanical arm is installed on the guide rail and can linearly move along the guide rail; the steel ball conveying and distributing device comprises lifting equipment and conveying equipment, a lower port of the lifting equipment is located above the guide rail, an upper port of the lifting equipment is connected with the head end of the conveying equipment, and one or more ball intercepting devices are arranged on the conveying equipment in the conveying direction of the conveying equipment. The outer side of the ball intercepting device is connected with a ball outlet groove, the bottom end of the ball outlet groove is connected with an automatic ball feeder, and the automatic ball feeder is connected with the ball mill. By means of the automatic ball feeding device, steel balls of different specifications can be automatically fed into the ball mill, the ball feeding process is uniform and can be adjusted at any time, and safety and high efficiency of steel ball feeding operation of the ball mill are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding, and particularly to an automatic steel ball adding system for a ball mill. Background Art

[0002] The grinding process is an important link in the ore dressing production process. As the main equipment in the grinding process, the grinding efficiency of a ball mill is one of the most important indicators. Steel balls, as a grinding medium in the ball mill, the dropping process together with the ore in the ball mill is the key link to ensure the grinding fineness. The operation process of the ball mill is also the wear process of the grinding medium. Therefore, to ensure the stability of the filling rate of the ball mill, it is necessary to continuously add steel balls into the cylinder body of the ball mill. A reasonable steel ball filling rate and ball diameter ratio can not only improve the grinding efficiency of the mill, but also help reduce the ball consumption.

[0003] With the development trend of the large-scale of ore dressing equipment, more and more large ball mills are applied to the grinding production process, and the amount of steel balls that need to be supplemented every day is as much as several tons or even more than ten tons. However, in the prior art, the method of adding steel balls to the ball mill is to manually operate the lifting equipment at regular intervals every day for addition, which has problems such as high labor intensity, long occupancy time of the overhead crane, and unreasonable ratio of the sizes of the steel balls in the mill. This method of adding steel balls does not conform to the law of ball consumption of the mill. Utility Model Content

[0004] The purpose of the present utility model is to provide an automatic steel ball adding system for a ball mill with high system automation, low manual labor intensity, safety and reliability in view of the problems existing in the prior art.

[0005] For this reason, the present utility model adopts the following technical solutions:

[0006] An automatic steel ball adding system for a ball mill, comprising a ball storage tank, a ball taking device, and a steel ball conveying and distributing device;

[0007] The ball taking device is located on one side of the ball storage tank and includes a manipulator and a guide rail. The head end of the manipulator is provided with a steel ball capturing structure, and the manipulator is installed on the guide rail and can move linearly along the guide rail;

[0008] The steel ball conveying and distributing device includes a lifting device and a conveying device. The lower port of the lifting device is located above the guide rail, and the upper port is connected to the head end of the conveying device. One or more ball intercepting devices are arranged on the conveying device along its conveying direction; an outlet chute is connected to the outside of the ball intercepting device, and the bottom end of the outlet chute is connected to an automatic ball adding machine, and the automatic ball adding machine is connected to the ball mill.

[0009] Further, the ball storage tank includes a plurality of ball storage compartments for storing steel balls of different specifications.

[0010] Further, the steel ball capturing structure is a lifting electromagnet.

[0011] Further, the lifting device includes a bucket elevator body. A bucket basket is provided at the lower end of the bucket elevator body, and a ball discharging port is provided at the upper end of the bucket elevator body. The ball discharging port is located above the conveying device.

[0012] Further, the conveying device is a conveyor belt.

[0013] Further, the ball intercepting device is composed of a single-side plough-type tripper.

[0014] Further, the bottom of the ball storage pool is inclined.

[0015] Further, the single-side plough-type tripper is provided with a cut-off baffle, and the cut-off baffle can move up and down.

[0016] Further, a controller is further included. The controller is respectively connected to the manipulator, the lifting device, the conveying device and the ball intercepting device.

[0017] The beneficial effects of the present utility model are as follows:

[0018] By using the automatic ball adding system of the ball mill of the present utility model, it is generally installed in a supporting manner during the construction of the grinding system or added later. The sizes of all the devices of the system are customized according to the on-site requirements and are respectively installed on platforms at different heights in the workshop. After the system is put into use, by using the PLC control program, the automatic addition of steel balls of different specifications to the ball mill can be realized, without arranging personnel for auxiliary operations, and at the same time, it does not occupy the work of the overhead crane. The ball adding process is uniform and can be adjusted at any time, ensuring the safety and high efficiency of the operation of adding steel balls to the ball mill. Description of the Drawings

[0019] Figure 1 is the assembly schematic diagram of the present utility model;

[0020] Figure 2 is the top view of the single-side plough-type tripper of the present utility model.

[0021] In the figure, 1 - conveyor belt, 1a - head electric roller, 1b - tail roller, 2 - single-side plough-type tripper, 2a - cut-off baffle, 3 - bucket elevator body, 3a - ball discharging port, 3b - bucket basket, 4 - ball taking device, 4a - lifting electromagnet, 4b - manipulator, 4c - guide rail, 5 - ball discharging chute, 6 - automatic ball adding machine, 7 - feeding chute, 8 - ball mill, 9 - ball storage pool, 10 - steel ball. Detailed Embodiments

[0022] The technical solutions of the present utility model will be further described below with reference to the drawings.

[0023] AsFigure 1-2 As shown in the figure, an automatic ball adding system for a ball mill includes a ball storage tank 9, a ball taking device 4, and a steel ball conveying and distributing device;

[0024] The ball storage tank 9 usually has six to eight ball storage compartments, and each ball storage compartment stores steel balls 10 of one specification. The bottom of the ball storage tank 9 is inclined to ensure that the steel balls 10 are always piled up on one side, enabling the lifting electromagnet 4a to smoothly adsorb the steel balls 10 at a fixed point.

[0025] The ball taking device 4 includes a manipulator 4b. The manipulator 4b is installed on a guide rail 4c, and the lifting electromagnet 4a is suspended at the head end of the manipulator 4b. The lifting electromagnet 4a can adjust its magnetism to adsorb steel balls 10 of different specifications and can be driven up and down by the manipulator 4b. The moving device of the manipulator 4b is the guide rail 4c. The guide rail 4c is installed on one side of the ball storage tank 9, and its laying direction is in a straight line with the bucket elevator and the conveyor belt 1. The ball taking device 4 selectively adsorbs and grabs the steel balls 10 in the ball storage tank and moves them to directly above the lifting equipment bucket 3b at the end of the guide rail 4c.

[0026] The manipulator adopts an existing manipulator product; the automatic ball adding machine adopts an existing automatic ball adding machine product, such as the EM-ABRT type automatic ball adding machine of Changsha Sanbo Mining Technology Co., Ltd.

[0027] The steel ball conveying and distributing device includes a lifting device, and the lifting device includes a bucket elevator body 3. At the lower end of the bucket elevator body 3, there is a bucket basket 3b in a funnel style. At the upper end of the bucket elevator body 3, there is a ball discharging port 3a. Below the ball discharging port 3a, there is a conveying device for transporting steel balls 10. The conveying device is a conveying belt 1, which is installed on the highest platform of the factory building and is erected above the material belt of the ball mill 8. Both ends of the conveying belt 1 are provided with a head electric roller 1a and a tail roller 1b. The head electric roller 1a is a frequency-adjustable external electric roller, and the frequency modulation signal can be remotely controlled by a controller and can be interlocked with the bucket elevator. One or more ball intercepting devices are arranged on the conveying belt 1. The number of ball intercepting devices is equal to the number of ball mills 8, and it is mainly used to deflect the steel balls transported on the conveying belt 1 into the ball discharging chute 5. The ball intercepting device is a unilateral plow-type discharger 2. The contact position between the cut-off baffle 2a of the unilateral plow-type discharger 2 and the surface of the conveying belt 1 is made of hard plastic or polyurethane material. The cut-off baffle 2a can move up and down, and its opening and closing are controlled by running the PLC program of the controller. The ball discharging chute 5 is connected to the outside of the ball intercepting device and is inclined, so that the steel balls 10 can smoothly enter the automatic ball adding machine 6 from the ball intercepting device through the ball discharging chute 5. The automatic ball adding machine 6 is arranged at the lower end of the ball discharging chute 5. The automatic ball adding machine 6 can continuously add steel balls 10 to the ball mill 8 without interruption. At the same time, the automatic ball adding machine 6 has the functions of counting and weighing, and can accurately judge the adding amount. Inside the automatic ball adding machine 6, there are two or three specifications of steel ball storage, and different specifications of steel balls 10 can be selectively added. It can also be added remotely, and the adding speed can be adjusted by the controller. At the outlet of the automatic ball adding machine 6, there is a feeding chute 7. The feeding chute 7 is arranged directly above the feeding end funnel of the ball mill 8, and the steel balls 10 will enter the cylinder of the ball mill 8 along with the ore or pulp.

[0028] The operation mode of the present utility model is as follows:

[0029] The controller controls the manipulator 4b to move on the guide rail 4c to the side of the ball storage tank 9. The manipulator 4b drives the lifting electromagnet 4a close to the ball storage tank 9. After starting the lifting electromagnet 4a and adsorbing the steel balls 10, the manipulator 4b approaches the lifting equipment along the guide rail 4c. The manipulator 4b controls the lifting electromagnet 4a to be directly above the bucket of the bucket elevator 3b. Then, the lifting electromagnet 4a is turned off, causing the steel balls to fall into the bucket of the bucket elevator 3b. The bucket of the bucket elevator scoops up the steel balls 10. After the bucket is lifted by the chain to the top of the bucket elevator, the bucket turns over downward after passing over the top wheel, and the steel balls 10 roll into the conveyor belt 1 through the ball discharge port 3a. When the steel balls 10 reach the single-sided plough diverter 2 along the conveyor belt 1, if the cut-off baffle 2a of the single-sided plough diverter 2 is not lifted, the steel balls 10 will pass through the cut-off baffle 2a and enter the automatic ball feeder 6 through the ball outlet chute 5. The automatic ball feeder 6 will control the feeding of balls to the ball mill 8 according to the preset of the PLC. The steel balls 10 pass through the feed chute 7 from the outlet of the automatic ball feeder 6 and start the grinding process as they enter the interior of the cylinder of the ball mill 8 along with the ore or pulp.

[0030] After the current ball mill 8 has been filled with the required number of steel balls 10, the controller controls the cut-off baffle 2a of the single-sided plough diverter 2 corresponding to the current ball mill 8 to be lifted, so that the subsequent transported steel balls 10 pass through the current single-sided plough diverter 2 and enter the next ball mill 8 according to the above process, and so on.

Claims

1. A ball mill automatic ball adding system, characterized in that: It comprises a ball storage pool (9), a ball taking device (4) and a steel ball conveying and distributing device; The ball retrieval device (4) is located on one side of the ball storage pool, and comprises a manipulator (4b) and a guide rail (4c); a steel ball capturing structure is provided at the head end of the manipulator (4b); the manipulator (4b) is mounted on the guide rail (4c) and can move linearly along the guide rail; The steel ball conveying and distribution device comprises a lifting device and a conveying device, wherein the lower port of the lifting device is located above the guide rail (4c), and the upper port is connected to the head end of the conveying device, and the conveying device is provided with one or more ball intercepting devices along its conveying direction; the outer side of the ball intercepting device is connected to a ball outlet groove (5), and the bottom end of the ball outlet groove (5) is connected to an automatic ball adding machine (6), and the automatic ball adding machine (6) is connected to a ball mill (8).

2. The automatic ball adding system of a ball mill (8) according to claim 1, characterized in that: The ball storage pool (9) comprises a plurality of ball storage cells, and the ball storage cells are used to store steel balls (10) of different specifications.

3. The automatic ball adding system of a ball mill (8) according to claim 1, characterized in that: The steel ball capturing structure is a lifting electromagnet (4a).

4. The automatic ball adding system for a ball mill according to claim 1, characterized in that: The lifting equipment comprises a bucket elevator body (3), a bucket basket (3b) is provided at the lower end of the bucket elevator body (3), and a ball discharge port (3a) is provided at the upper end of the bucket elevator body (3), and the ball discharge port (3a) is located above the conveying equipment.

5. The automatic ball adding system for a ball mill according to claim 1, characterized in that: The conveying equipment is a conveying belt (1).

6. The automatic ball adding system for a ball mill according to claim 1, characterized in that: The ball intercepting device is composed of a single-sided plough-type discharger (2).

7. The automatic ball adding system for a ball mill according to claim 2, characterized in that: The bottom of the ball storage pool (9) is arranged inclined.

8. The automatic ball adding system for a ball mill according to claim 6, characterized in that: The single-sided plough-type discharger (2) is provided with a stop baffle (2a), and the stop baffle (2a) is movable up and down.

9. The automatic ball adding system for a ball mill according to claim 1, characterized in that: The device also includes a controller, which is respectively connected with the manipulator, the lifting device, the conveying device and the ball intercepting device.

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