Coal gangue ball milling system

Abstract

The utility model discloses a coal gangue ball milling system, which comprises ball mills, a three-way material distributing valve and a steel ball batching system, an outlet of a weighing hopper of the steel ball batching system is communicated with an inlet of the three-way material distributing valve, and two outlets of the three-way material distributing valve are respectively arranged above steel ball feeding stations of the two ball mills; a hopper is arranged below each of the steel ball discharge stations of the two ball mills; and the outlet of each hopper is communicated with the inlet of the steel ball batching system. The device has the advantages that the steel balls discharged by the ball mill are graded by the screening machine, then are sequentially conveyed to the weighing hopper and are metered, and then the steel balls with corresponding specifications can be added through the counterweight port, so that accurate batching is realized, and the ball milling effect is ensured; and the damaged steel balls can be separated out, so that the treatment capacity of the ball mill is ensured.

Description

Technical Field:

[0001] The utility model relates to the technical field of coal gangue ball milling, and specifically relates to a coal gangue ball milling system. Background Art:

[0002] During the coal mining process, affected by underground mining, separation spaces will be formed inside the overlying strata. If the separation spaces are not filled in time, subsidence will occur, posing a great safety hazard. At present, our company has developed a process for filling separation spaces with coal gangue. The main process is to ball mill the coal gangue with a ball mill and then add water to make a slurry, and then send the slurry to the separation space through drilling for filling. On the one hand, it can fill the separation space and improve safety; on the other hand, it can utilize the coal gangue and reduce the harm of coal gangue stacking to the environment. The ball mill is an important component of the gangue grouting system. It mainly uses steel balls of three diameters for grading and mixing to ball mill the coal gangue. After long-term operation, the steel balls in the ball mill will be worn to varying degrees, so regrading is required. At present, mainly by observing the discharge of the ball mill, steel balls are manually added to the ball mill and adjusted according to the ball milling structure. However, manual observation and adjustment have large errors and are greatly affected by the work experience of workers. Moreover, the damaged steel balls cannot be discharged in time, which will also affect the ball milling effect and throughput. Content of the Utility Model:

[0003] The purpose of the utility model is to provide a coal gangue ball milling system.

[0004] The coal gangue ball milling system of the utility model includes a ball mill, and also includes a three-way distribution valve and a steel ball batching system. The outlet of the weighing hopper of the steel ball batching system is communicated with the inlet of the three-way distribution valve, and the two outlets of the three-way distribution valve are respectively placed above the steel ball feeding stations of the two ball mills; below the steel ball discharge stations of the two ball mills, a hopper is respectively arranged, and the outlet of the hopper is communicated with the inlet of the steel ball batching system.

[0005] Further, the steel ball batching system includes a grading screen and a weighing hopper. The feed inlet of the grading screen is located below the steel ball discharge station of the ball mill. The first discharge outlet of the grading screen is the waste discharge outlet. The second discharge outlet of the grading screen is communicated with the inlet of the first buffer bin. The third discharge outlet of the grading screen is communicated with the inlet of the second buffer bin. The outlets of the first buffer bin, the second buffer bin, and the fourth discharge outlet of the grading screen are respectively communicated with the feed inlet of the weighing hopper through a first chute, a second chute, and a third chute. A counterweight port is arranged at the top of the weighing hopper, and a first control valve and a second control valve are respectively installed on the first chute and the second chute.

[0006] Furthermore, it further includes a first raw material tank, a second raw material tank, and a third raw material tank. The outlets of the first raw material tank, the second raw material tank, and the third raw material tank are respectively communicated with the counterweight port of the weighing hopper through a fourth chute, a fifth chute, and a sixth chute. A third control valve, a fourth control valve, and a fifth control valve are respectively installed on the fourth chute, the fifth chute, and the sixth chute.

[0007] Furthermore, the weighing sensor of the weighing hopper is connected to the input end of the controller, and the output end of the controller is respectively connected to the first control valve, the second control valve, the third control valve, the fourth control valve, and the fifth control valve.

[0008] Furthermore, the outlet of the waste discharge port is communicated with the inlet of the waste collection box.

[0009] Furthermore, the output end of the controller is electrically connected to the drive motor of the three-way distribution valve.

[0010] Advantages of the present utility model: There are two ball mills as backups for each other, and the steel balls of the standby ball mill can be re-formulated using the steel ball batching system, and then sent back to the ball mill through the three-way distribution valve, which is convenient for realizing continuous production and accurate batching. After the steel balls discharged from the ball mill are classified by the screening machine, they are sequentially sent to the weighing hopper. After weighing, the steel balls of the corresponding specification can be added through the counterweight port, thereby realizing accurate batching and ensuring the ball milling effect; and the damaged steel balls can be separated to ensure the processing capacity of the ball mill. Description of the drawings:

[0011] Figure 1 It is a schematic diagram of the overall structure of this embodiment.

[0012] Figure 2 It is a schematic diagram of the controller connection of this embodiment.

[0013] Classification screen 1, weighing hopper 2, waste discharge port 3, first buffer bin 4, second buffer bin 5, first chute 6, second chute 7, third chute 8, counterweight port 9, first control valve 10, second control valve 11, first raw material tank 12, second raw material tank 13, third raw material tank 14, fourth chute 15, fifth chute 16, sixth chute 17, third control valve 18, fourth control valve 19, fifth control valve 20, weighing sensor 21, controller 22, waste collection box 23, ball mill 24, three-way distribution valve 25, hopper 26. Specific implementation manners:

[0014] In the description of the present utility model, it should be noted that when terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, when terms such as "first", "second", "third" appear, they are only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0015] As Figure 1 and Figure 2 shown, the gangue ball mill system includes a ball mill 24, and also includes a three-way material distribution valve 25 and a steel ball batching system. The outlet of the weighing hopper 2 of the steel ball batching system is communicated with the inlet of the three-way material distribution valve 25, and the two outlets of the three-way material distribution valve 25 are respectively placed above the steel ball feeding stations of the two ball mills 24; a hopper 26 is respectively arranged below the steel ball discharge stations of the two ball mills 24, and the outlet of the hopper 26 is communicated with the inlet of the steel ball batching system. The two ball mills 24 are in a standby-one-use mode and share a set of steel ball batching systems. After the steel ball discharge port of the standby ball mill 24 rotates to the lower steel ball discharge station, the steel ball discharge port is opened, and the steel balls inside can be discharged into the lower hopper 26, and then sent to the steel ball batching system. After being re-batched by the steel ball batching system, the steel balls in the weighing hopper 2 are sent to the inlet of the three-way material distribution valve 25 through conveying equipment such as a bucket elevator, and then sent back to the standby ball mill 24 for standby.

[0016] The steel ball batching system includes a grading screen 1 and a weighing hopper 2. The feed inlet of the grading screen 1 is located below the discharge station of the steel ball discharge port of the ball mill. The first discharge port of the grading screen 1 is a waste discharge port 3. The second discharge port of the grading screen 1 is communicated with the inlet of the first buffer bin 4. The third discharge port of the grading screen 1 is communicated with the inlet of the second buffer bin 5. The outlets of the first buffer bin 4, the second buffer bin 5, and the fourth discharge port of the grading screen 1 are respectively communicated with the feed inlet of the weighing hopper 2 through a first chute 6, a second chute 7, and a third chute 8. A counterweight port 9 is provided at the top of the weighing hopper 2. A first control valve 10 and a second control valve 11 are respectively installed on the first chute 6 and the second chute 7. After the steel ball discharge port of the ball mill rotates to the discharge station of the steel ball discharge port of the ball mill, the steel ball discharge port is opened, and the steel balls in the ball mill are discharged into the grading screen 1 for screening. First, the broken steel balls have a smaller particle size and are first discharged from the waste discharge port 3. The outlet of the waste discharge port 3 is communicated with the inlet of the waste collection box 23. The broken steel ball waste is discharged into the waste collection box 23 through the waste discharge port 3, which is convenient for unified collection and treatment. Then, the remaining steel balls are discharged through the second discharge port, the third discharge port, and the fourth discharge port in sequence. The first steel balls discharged from the second discharge port are stored in the first buffer bin 4. The second steel balls discharged from the third discharge port are stored in the second buffer bin 5. The third steel balls discharged from the fourth discharge port directly enter the third chute 8 and are sent to the weighing hopper 2 for weighing. After the screening is completed, first, third steel balls are added to the weighing hopper 2 through the counterweight port 9 until the weight of the third steel balls reaches the process requirement and then the addition of the third steel balls is stopped. Then, the first control valve 10 is opened, and all the first steel balls in the first buffer bin 4 are discharged into the weighing hopper 2 through the first chute 6. After that, first steel balls are added to the weighing hopper 2 through the counterweight port 9. When the total weight of the steel balls in the weighing hopper 2 reaches the sum of the weights of the third steel balls and the first steel balls required by the process, the addition of the first steel balls is stopped. Finally, the second control valve 11 is opened, and all the steel balls in the second buffer bin 5 are discharged into the weighing hopper 2. Then, second steel balls are added to the weighing hopper 2 through the counterweight port 9 until the total weight of the steel balls in the weighing hopper 2 reaches the sum of the weights of the third steel balls, the second steel balls, and the first steel balls required by the process, and then the addition of the second steel balls is stopped, completing the batching process.

[0017] Specifically, it further includes a first raw material bin 12, a second raw material bin 13 and a third raw material bin 14. The outlets of the first raw material bin 12, the second raw material bin 13 and the third raw material bin 14 are respectively communicated with the counterweight port 9 of the weighing hopper 2 through a fourth chute 15, a fifth chute 16 and a sixth chute 17. A third control valve 18, a fourth control valve 19 and a fifth control valve 20 are respectively installed on the fourth chute 15, the fifth chute 16 and the sixth chute 17. The first raw material bin 12 is used to store first steel balls of the same specification as the steel balls in the first buffer bin 4. The second raw material bin 13 is used to store second steel balls of the same specification as the steel balls in the second buffer bin 5. The third raw material bin 14 is used to store third steel balls of the same specification as the steel balls discharged from the fourth discharge port of the grading screen 1. By opening the corresponding third control valve 18, fourth control valve 19 or fifth control valve 20 below, the steel balls in the corresponding raw material bin can be added to the weighing hopper 2 through the corresponding chute via the counterweight port 9 to achieve automatic replenishment. The weighing sensor 21 of the weighing hopper 2 is connected to the input end of the controller 22. The output end of the controller 22 is respectively connected to the first control valve 10, the second control valve 11, the third control valve 18, the fourth control valve 19 and the fifth control valve 20. The weighing sensor 21 transmits the detected data to the controller 22, and controls the opening and closing of each control valve according to the received data. The output end of the controller 22 is electrically connected to the drive motor of the three-way diverter valve 25, and the discharge path of the three-way diverter valve 25 can be switched through the controller 22.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Coal gangue ball milling system, which includes a ball mill, characterized in that, It further includes a three-way material distribution valve and a steel ball batching system. The outlet of the weighing hopper of the steel ball batching system is communicated with the inlet of the three-way material distribution valve. The two outlets of the three-way material distribution valve are respectively located above the steel ball feeding stations of the two ball mills. Below the steel ball discharging stations of the two ball mills, a hopper is respectively arranged, and the outlet of the hopper is communicated with the inlet of the steel ball batching system.

2. The coal gangue ball milling system according to claim 1, characterized in that, The steel ball batching system includes a grading screen and a weighing hopper. The inlet of the grading screen is located below the steel ball discharging station of the ball mill. The first discharge port of the grading screen is a waste discharge port. The second discharge port of the grading screen is communicated with the inlet of the first buffer bin. The third discharge port of the grading screen is communicated with the inlet of the second buffer bin. The outlets of the first buffer bin, the second buffer bin, and the fourth discharge port of the grading screen are respectively communicated with the inlet of the weighing hopper through a first chute, a second chute, and a third chute. A counterweight port is arranged at the top of the weighing hopper. A first control valve and a second control valve are respectively installed on the first chute and the second chute.

3. The coal gangue ball milling system according to claim 2, wherein It further includes a first raw material tank, a second raw material tank, and a third raw material tank. The outlets of the first raw material tank, the second raw material tank, and the third raw material tank are respectively communicated with the counterweight port of the weighing hopper through a fourth chute, a fifth chute, and a sixth chute. A third control valve, a fourth control valve, and a fifth control valve are respectively installed on the fourth chute, the fifth chute, and the sixth chute.

4. The coal gangue ball milling system according to claim 3, characterized in that, The weighing sensor of the weighing hopper is connected to the input end of the controller. The output end of the controller is respectively connected to the first control valve, the second control valve, the third control valve, the fourth control valve, and the fifth control valve.

5. The coal gangue ball milling system according to any one of claims 2 to 4, characterized in that, The outlet of the waste discharge port is communicated with the inlet of the waste collection box.

6. The coal gangue ball milling system according to claim 4, wherein The output end of the controller is electrically connected to the drive motor of the three-way material distribution valve.

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