A continuous ball milling and screening system with controllable discharge ratio and method thereof

Abstract

A kind of continuous ball mill screening system and method with controllable discharge ratio, including coarse material storage bin, fine material storage bin, ball mill fine material temporary storage bin, medium material transition temporary storage bin, raw material temporary storage bin, ball mill feed temporary storage bin, vibrating screen cavity, vibrating screen cavity includes first level, second level, third level, fourth level rotating vibrating screen cavity;The system is formed by each equipment and stainless steel pipeline closed environment, system can realize material transmission in closed pipeline by relying on fan and air lock, system can continuously add crystal raw materials for ball milling, system can simultaneously screen out different particle size powders, system can weigh different particle size materials generated by screening, system can rely on on-off valve to control the output of different particle size powders according to set ratio, system can transport the excess output powder back to ball mill for ball milling, according to weighing sensor and PLC control system.

Description

Technical Field

[0001] This patent relates to the field of refractory materials technology, specifically to a continuous ball mill screening system and method with controllable output ratio. Background Technology

[0002] As a reaction vessel for a certain product, the production of calcium fluoride crucibles requires the use of calcium fluoride crystals of different particle sizes (coarse, medium, and fine) as raw materials. These crystals are obtained by directly purchasing granular calcium fluoride crystals and then ball milling and sieving them. The proportion of coarse, medium, and fine crystals used is strictly limited by the process parameters.

[0003] The current production process uses a ball mill for raw material grinding and a vibrating screen for sieving. However, the ball mill can only process a fixed amount of raw material per operating cycle, limiting its capacity. Furthermore, the ball mill can only control parameters such as loading rate, milling speed, and milling time, making it difficult to control the degree of grinding. In practice, after grinding the raw material according to the set process parameters, the proportion of coarse, medium, and fine particles obtained after sieving does not match the required proportion of the three materials for preparing the calcium fluoride crucible, resulting in ineffective proportions. Moreover, the larger particle size obtained after sieving needs to be ball-milled again (e.g., the required proportion for crucible production is coarse: medium: fine = 2:4:4, but after one ball milling and sieving cycle, the proportion of unqualified material: coarse: medium: fine = 1:2:4:3, with insufficient fine material). Additionally, the operation of both processes and the coordination between the equipment require manual labor, which is cumbersome, labor-intensive, and time-consuming.

[0004] Therefore, a continuous ball mill screening system and method with controllable output ratio is proposed to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a continuous ball mill screening system and method with controllable output ratio, thereby solving the problems of low production capacity, uncontrollable output ratio, and high labor intensity in existing ball mill screening technologies.

[0006] The technical solution of the present invention is as follows: a continuous ball mill screening system with controllable discharge ratio, including a coarse material storage bin, a fine material storage bin, a ball mill fine material temporary storage bin, a medium material transition temporary storage bin, a raw material temporary storage bin, a ball mill feed temporary storage bin, and a vibrating screen chamber, wherein the vibrating screen chamber includes a primary rotary vibrating screen chamber, a secondary rotary vibrating screen chamber, a tertiary rotary vibrating screen chamber, and a quaternary rotary vibrating screen chamber;

[0007] The coarse material storage silo is connected to the coarse material temporary storage silo via airlock B. The coarse material storage silo is equipped with a weighing sensor A. The coarse material temporary storage silo is equipped with a blower A. The coarse material temporary storage silo is connected to a reversing valve A. The reversing valve A is also connected to the coarse material transition temporary storage silo and the secondary vibrating screen chamber. The coarse material transition temporary storage silo is connected to the ball mill feed temporary storage silo via airlock A. The coarse material transition temporary storage silo is equipped with a blower A.

[0008] The ball mill feed storage hopper is connected to the intermediate material transition storage hopper via an airlock E. The intermediate material transition storage hopper is equipped with a blower E. The intermediate material transition storage hopper is connected to a reversing valve B. The reversing valve B is connected to both the intermediate material storage hopper and the three-stage vibrating screen chamber. The intermediate material storage hopper is connected to the intermediate material storage hopper 15 via an airlock D. The intermediate material storage hopper is equipped with a weighing sensor C.

[0009] The ball mill feed storage silo is also connected to the raw material storage silo via an airlock F. The raw material storage silo is equipped with a blower B and a raw material inlet.

[0010] The ball mill feed storage silo is also connected to the ball mill defective material storage silo via an airlock G. The ball mill defective material storage silo is connected to the primary vibrating screen chamber. A blower C is installed on the ball mill defective material storage silo.

[0011] The ball mill feed storage hopper is connected to the continuous ball mill via a screw conveyor mechanism. The continuous ball mill is connected to the ball mill discharge storage hopper. The ball mill discharge storage hopper is connected to the vibrating screen via an airlock H. A blower D is installed on the ball mill discharge storage hopper.

[0012] It also includes a fine material storage silo, which is connected to the ball mill fine material temporary storage silo via an airlock C. The ball mill fine material temporary storage silo is equipped with a blower F and is connected to a four-stage vibrating screen chamber.

[0013] It also includes PLC control system control, which sets the proportions of coarse, medium and fine materials for ball milling.

[0014] A continuous ball mill screening method with controllable output ratio includes the following steps:

[0015] S1: Based on the weight of the crystal raw material fed into the raw material inlet, set the corresponding proportions of ball mill coarse material, ball mill medium material, and ball mill fine material;

[0016] S2: The crystalline raw material to be ball-milled and screened is drawn into the ball mill feed storage hopper from the raw material inlet by the blower;

[0017] S3: The crystal raw material flows into the continuous ball mill under the action of the spiral pushing mechanism, and the continuous ball mill grinds the crystal raw material.

[0018] S4: Small crystal particles from the ball milling process are drawn into the vibrating screen by a blower;

[0019] S5: After being screened by a vibrating screen, the unqualified material from the ball mill flows out from the primary vibrating screen chamber;

[0020] S6: The unqualified material from the ball mill is sucked from the primary vibrating screen chamber into the ball mill feed storage hopper by the blower;

[0021] S7: After being screened by a vibrating screen, the coarse material from the ball mill flows out from the secondary vibrating screen chamber;

[0022] S8: The ball mill coarse material is drawn from the secondary vibrating screen chamber into the ball mill coarse material storage silo by the blower;

[0023] S9: The weighing sensor weighs the ball mill coarse material in the ball mill coarse material storage bin. When the weighing reading reaches the set ball mill coarse material ratio, the reversing valve is activated, closing the pipeline to the ball mill coarse material storage bin and opening the pipeline to the ball mill feed temporary storage bin.

[0024] S10: After being screened by a vibrating screen, the material from the ball mill flows out from the three-stage vibrating screen chamber;

[0025] S11: The ball mill medium is drawn from the three-stage vibrating screen chamber into the ball mill medium storage silo by the blower;

[0026] S12: The weighing sensor weighs the ball mill material in the ball mill material storage bin. When the weighing reading reaches the set proportion of ball mill material, the reversing valve is activated, closing the pipeline to the ball mill material storage bin and opening the pipeline to the ball mill feed storage bin.

[0027] S13: After being screened by a vibrating screen, the fine material from the ball mill flows out from the fourth-stage vibrating screen chamber;

[0028] S14: The ball mill fines are drawn from the four-stage vibrating screen chamber into the ball mill fines storage silo by the blower.

[0029] In S1, the coarse particle size ranges from 0.5 to 0.8 mm, the medium particle size ranges from 0.1 to 0.5 mm, and the fine particle size ranges from less than 0.1 mm.

[0030] In S1, the ratio of ball mill coarse material, ball mill medium material, and ball mill fine material is 2:3:5.

[0031] In S2, the raw material temporary storage silo, in conjunction with the airlock, enables the intake of crystal raw materials.

[0032] In step S4, the ball mill discharge storage hopper, in conjunction with the airlock, enables the intake of small-particle crystals.

[0033] In S6, the ball mill defective material temporary storage silo, in conjunction with the airlock, realizes the function of sucking in defective ball mill material.

[0034] In S8, the ball mill coarse material temporary storage hopper, in conjunction with the airlock, realizes the function of ball mill coarse material suction.

[0035] In step S9, the weighing sensor weighs the ball mill coarse material in the ball mill coarse material storage bin and feeds the data back to the PLC control system.

[0036] The significant advantages of this invention are as follows: the system forms a closed environment with various devices and stainless steel pipes. The system relies on fans and airlocks to transport materials within the closed pipes. The system can continuously add crystalline raw materials for ball milling. The system can simultaneously sieve powders of different particle sizes. The system can weigh the materials of different particle sizes produced by sieving. The system can control the output of powders of different particle sizes according to a set ratio using a reversing valve. The system can return excess powder to the ball mill for further ball milling. This is achieved through a weighing sensor and PLC control system. The system can produce materials of different particle sizes according to a set ratio. This invention provides a continuous ball milling and sieving system and method with controllable output ratio. Beneficial effects include optimized production processes, requiring only raw material loading during the process; the components in the system do not need repeated separation and loading. Beneficial effects include controllable output ratio, which reduces the generation of ineffective material components and waste. Beneficial effects include a self-closed circulation system, which reduces dust leakage and environmental pollution. Beneficial effects include optimized process steps and reduced labor input. Attached Figure Description

[0037] Figure 1 A schematic diagram of a continuous ball mill screening system with controllable output ratio;

[0038] In the diagram: 1. Weighing sensor A; 2. Coarse material storage silo; 3. Airlock A; 4. Airlock B; 5. Coarse material transition storage silo; 6. Reversing valve A; 7. Fan A; 8. Coarse material temporary storage silo; 9. Fan B; 10. Weighing sensor B; 11. Fine material storage silo; 12. Airlock C; 13. Fine material temporary storage silo; 14. Fan C; 15. Medium material storage silo; 16. Medium material temporary storage silo; 17. Fan D; 18. Airlock D; 19. Weighing sensor C; 20. Fan E; 21. Reversing valve B; 22. Medium material transition storage silo; 23. Airlock 24. Blower F, 25. Raw material temporary storage bin, 26. Raw material inlet, 27. Blower G, 28. Ball mill unqualified material temporary storage bin, 29. Airlock F, 30. Airlock G, 31. Blower H, 32. Ball mill discharge temporary storage bin, 33. Airlock H, 34. First-stage vibrating screen (ball mill unqualified material), 35. Second-stage vibrating screen (ball mill coarse material), 36. Third-stage vibrating screen (ball mill medium material), 37. Fourth-stage vibrating screen (ball mill fine material), 38. Continuous ball mill, 39. Spiral pusher mechanism, 40. Ball mill feed temporary storage bin. Detailed Implementation

[0039] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0040] The terminology used in one or more embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of one or more embodiments of this application. The singular forms “a,” “the,” and “the” used in one or more embodiments of this application and in the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” used in one or more embodiments of this application refers to and includes any or all possible combinations of one or more associated listed items.

[0041] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this application, and similarly, second may also be referred to as first.

[0042] A continuous ball mill screening system with controllable discharge ratio includes a coarse material storage bin 2, a fine material storage bin 11, a ball mill fine material temporary storage bin 13, a medium material transition temporary storage bin 22, a raw material temporary storage bin 25, a ball mill feed temporary storage bin 40, and a vibrating screen chamber. The vibrating screen chamber includes a primary rotary vibrating screen chamber 34 (ball mill unqualified material), a secondary rotary vibrating screen chamber 35 (ball mill coarse material), a tertiary rotary vibrating screen chamber 36 (ball mill medium material), and a quaternary rotary vibrating screen chamber 37 (ball mill fine material).

[0043] The coarse material storage silo 2 is connected to the coarse material temporary storage silo 8 via an airlock B4. The coarse material storage silo 2 is equipped with a weighing sensor A1. The coarse material temporary storage silo 8 is equipped with a blower A9. The coarse material temporary storage silo 8 is connected to a reversing valve A6. The reversing valve A6 is also connected to the coarse material transition temporary storage silo 5 and the secondary vibrating screen chamber 35. The coarse material transition temporary storage silo 5 is connected to the ball mill feed temporary storage silo 40 via an airlock A3. The coarse material transition temporary storage silo 5 is equipped with a blower A7.

[0044] The ball mill feed storage hopper 40 is connected to the intermediate material transition storage hopper 22 via an airlock E23. The intermediate material transition storage hopper 22 is equipped with a blower E20. The intermediate material transition storage hopper 22 is connected to a reversing valve B21. The reversing valve B21 is simultaneously connected to the intermediate material storage hopper 16 and the three-stage vibrating screen chamber 36. The intermediate material storage hopper 16 is connected to the intermediate material storage hopper 15 via an airlock D18. The intermediate material storage hopper 15 is equipped with a weighing sensor C19.

[0045] The ball mill feed storage bin 40 is also connected to the raw material storage bin 25 via an airlock F29. The raw material storage bin 25 is equipped with a blower B24 and a raw material inlet 26.

[0046] The ball mill feed storage silo 40 is also connected to the ball mill unqualified material storage silo 28 through the airlock G30. The ball mill unqualified material storage silo 28 is connected to the first-stage vibrating screen chamber 34. A blower C27 is installed on the ball mill unqualified material storage silo 28.

[0047] The ball mill feed storage hopper 40 is connected to the continuous ball mill 38 via a spiral pushing mechanism 39. The continuous ball mill 38 is connected to the ball mill discharge storage hopper 32. The ball mill discharge storage hopper 32 is connected to a vibrating screen via an airlock H33. A blower D31 is installed on the ball mill discharge storage hopper 32.

[0048] It also includes a fine material storage bin 11, which is connected to a ball mill fine material temporary storage bin 13 via an airlock C12. The ball mill fine material temporary storage bin 13 is equipped with a blower F14 and is connected to a four-stage vibrating screen 37.

[0049] A continuous ball mill screening method with controllable output ratio includes the following steps:

[0050] 1) Based on the weight of the crystal raw material fed into the raw material inlet 26, set the corresponding proportions of ball mill coarse material, ball mill medium material, and ball mill fine material in the central control PLC control system;

[0051] 2) The crystalline raw material to be ball-milled and screened is sucked into the ball mill feed storage bin 40 from the raw material inlet 26 by the blower 24. The raw material storage bin 25, together with the airlock 29, realizes the function of crystalline raw material suction.

[0052] 3) The crystal raw material flows into the continuous ball mill 38 under the action of the spiral pushing mechanism 39, and the continuous ball mill 38 performs ball milling on the crystal raw material;

[0053] 4) The small crystal particles during the ball milling process are sucked into the vibrating screen by the blower 31, and the ball mill discharge temporary storage bin 32, together with the airlock 33, realizes the function of sucking in small crystal particles;

[0054] 5) After being screened by the vibrating screen, the unqualified material from the ball mill flows out from the primary vibrating screen chamber 34;

[0055] 6) The unqualified material from the ball mill is sucked from the primary vibrating screen chamber 34 into the ball mill feed storage bin (40) by the blower 27. The ball mill unqualified material storage bin 28, together with the airlock 30, realizes the function of sucking up the unqualified material from the ball mill.

[0056] 7) After being screened by a vibrating screen, the ball mill coarse material flows out from the secondary vibrating screen chamber 35;

[0057] 8) The ball mill coarse material is sucked from the secondary vibrating screen chamber 35 into the ball mill coarse material storage bin 2 by the blower 9. The ball mill coarse material temporary storage bin 8, together with the airlock 4, realizes the ball mill coarse material suction function.

[0058] 9) Weighing sensor 1 weighs the ball mill coarse material in ball mill coarse material storage bin 2 and feeds the data back to the central control PLC. When the weighing reading reaches the set ball mill coarse material ratio, the reversing valve 6 is activated, closing the pipeline to ball mill coarse material storage bin 2 and opening the pipeline to ball mill feed temporary storage bin 40.

[0059] 10) After being screened by a vibrating screen, the material from the ball mill flows out from the three-stage vibrating screen chamber 36;

[0060] 11) The ball mill material is sucked from the three-stage vibrating screen chamber 36 into the ball mill material storage bin 15 by the blower 17. The ball mill material temporary storage bin 16, together with the airlock 18, realizes the function of ball mill coarse material suction.

[0061] 12) Weighing sensor 19 weighs the ball mill material in ball mill material storage bin 15 and feeds the data back to central control PLC. When the weighing reading reaches the set proportion of ball mill material, reversing valve 21 is activated, closing the pipeline to ball mill material storage bin 15 and opening the pipeline to ball mill feed temporary storage bin 40.

[0062] 13) After being screened by a vibrating screen, the ball milled fines flow out from the fourth-stage vibrating screen chamber 37;

[0063] 14) The ball mill fine material is sucked from the fourth-stage vibrating screen chamber 37 into the ball mill fine material storage bin 11 by the blower 14. The ball mill fine material temporary storage bin 13, together with the airlock 12, realizes the ball mill coarse material suction function.

[0064] Example 1:

[0065] The continuous ball mill screening system with controllable discharge ratio is designed for three-stage discharge, with coarse material particle size ranging from 0.5 to 0.8 mm, medium material particle size ranging from 0.1 to 0.5 mm, and fine material particle size ranging from <0.1 mm. The three-stage discharge ratio is controllable at 2:3:5.

[0066] The above description is merely a preferred embodiment of this patent and is not intended to limit this patent. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this patent shall be included within the scope of protection of this patent.

[0067] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0068] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0069] The preferred embodiments disclosed above are merely illustrative of this application. The optional embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this application. These embodiments are selected and specifically described in this application to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize this application.

Claims

1. A continuous ball mill screening system with controllable discharge ratio, characterized in that: It includes a coarse material storage silo (2), a fine material storage silo (11), a ball mill fine material temporary storage silo (13), a medium material transition temporary storage silo (22), a raw material temporary storage silo (25), a ball mill feed temporary storage silo (40), and a vibrating screen chamber, which includes a primary rotary vibrating screen chamber (34), a secondary rotary vibrating screen chamber (35), a tertiary rotary vibrating screen chamber (36), and a quaternary rotary vibrating screen chamber (37); The coarse material storage silo (2) is connected to the coarse material temporary storage silo (8) through the airlock B (4). The coarse material storage silo (2) is equipped with a weighing sensor A (1). The coarse material temporary storage silo (8) is equipped with a blower A (9). The coarse material temporary storage silo (8) is connected to a reversing valve A (6). The reversing valve A (6) is also connected to the coarse material transition temporary storage silo (5) and the secondary vibrating screen chamber (35). The coarse material transition temporary storage silo (5) is connected to the ball mill feed temporary storage silo (40) through the airlock A (3). The coarse material transition temporary storage silo (5) is equipped with a blower A (7). The ball mill feed storage bin (40) is connected to the intermediate material transition storage bin (22) via an airlock E (23). The intermediate material transition storage bin (22) is equipped with a blower E (20). The intermediate material transition storage bin (22) is connected to a reversing valve B (21). The reversing valve B (21) is connected to both the intermediate material storage bin (16) and the three-stage vibrating screen chamber (36). The intermediate material storage bin (16) is connected to the intermediate material storage bin (15) via an airlock D (18). The intermediate material storage bin (15) is equipped with a weighing sensor C (19). The ball mill feed storage bin (40) is also connected to the raw material storage bin (25) via an airlock F (29). The raw material storage bin (25) is equipped with a blower B (24) and a raw material inlet (26). The ball mill feed storage bin (40) is also connected to the ball mill defective material storage bin (28) via an airlock G (30). The ball mill defective material storage bin (28) is connected to the primary vibrating screen chamber (34). A blower C (27) is installed on the ball mill defective material storage bin (28). The ball mill feed storage bin (40) is connected to the continuous ball mill (38) via a screw conveyor (39). The continuous ball mill (38) is connected to the ball mill discharge storage bin (32). The ball mill discharge storage bin (32) is connected to the vibrating screen via an airlock H (33). A blower D (31) is installed on the ball mill discharge storage bin (32). It also includes a fine material storage silo (11), which is connected to a ball mill fine material temporary storage silo (13) via an airlock C (12). The ball mill fine material temporary storage silo (13) is equipped with a blower F (14) and is connected to a four-stage vibrating screen cavity (37).

2. The continuous ball mill screening system with controllable discharge ratio according to claim 1, characterized in that: It also includes PLC control system control, which sets the proportions of coarse, medium and fine materials for ball milling.

3. A continuous ball mill screening method with controllable discharge ratio, using the continuous ball mill screening system with controllable discharge ratio as described in claim 2, characterized in that: Includes the following steps: S1: Based on the weight of the crystal raw material fed into the raw material port (26), set the corresponding proportions of ball mill coarse material, ball mill medium material, and ball mill fine material; S2: The crystal raw material to be ball milled and screened is sucked into the ball mill feed storage bin (40) from the raw material port (26) by the blower (24); S3: The crystal raw material flows into the continuous ball mill (38) under the action of the spiral pushing mechanism (39), and the continuous ball mill (38) performs ball milling on the crystal raw material; S4: Small crystal particles from the ball milling process are drawn into the vibrating screen by the blower (31); S5: After being screened by a vibrating screen, the unqualified material from the ball mill flows out from the primary vibrating screen cavity (34); S6: The unqualified material from the ball mill is sucked from the primary vibrating screen cavity (34) into the ball mill feed storage hopper (40) by the blower (27); S7: After being screened by a vibrating screen, the ball mill coarse material flows out from the secondary vibrating screen cavity (35); S8: The ball mill coarse material is sucked from the secondary vibrating screen cavity (35) into the ball mill coarse material storage silo (2) by the blower (9); S9: The weighing sensor (1) weighs the ball mill coarse material in the ball mill coarse material storage bin (2). When the weighing reading reaches the set ball mill coarse material ratio, the reversing valve (6) is activated, closing the pipeline to the ball mill coarse material storage bin (2) and opening the pipeline to the ball mill feed temporary storage bin (40). S10: After being screened by a vibrating screen, the ball mill material flows out from the three-stage vibrating screen cavity (36); S11: The ball mill material is drawn from the three-stage vibrating screen cavity (36) into the ball mill material storage silo (15) by the blower (17); S12: The weighing sensor (19) weighs the ball mill material in the ball mill material storage bin (15). When the weighing reading reaches the set ball mill material ratio, the reversing valve (21) is activated, closing the pipeline to the ball mill material storage bin (15) and opening the pipeline to the ball mill feed temporary storage bin (40). S13: After being screened by a vibrating screen, the ball milled fines flow out from the fourth-stage vibrating screen cavity (37); S14: The ball mill fines are sucked from the fourth-stage vibrating screen cavity (37) into the ball mill fines storage bin (11) by the blower (14).

4. The continuous ball mill screening method with controllable output ratio according to claim 3, characterized in that: In S1, the coarse particle size ranges from 0.5 to 0.8 mm, the medium particle size ranges from 0.1 to 0.5 mm, and the fine particle size ranges from less than 0.1 mm.

5. The continuous ball mill screening method with controllable output ratio according to claim 3, characterized in that: In S1, the ratio of ball mill coarse material, ball mill medium material, and ball mill fine material is 2:3:

5.

6. The continuous ball mill screening method with controllable output ratio according to claim 3, characterized in that: In S2, the raw material temporary storage bin (25) works in conjunction with the airlock (29) to realize the function of crystalline raw material intake.

7. The continuous ball mill screening method with controllable output ratio according to claim 3, characterized in that: In S4, the ball mill discharge temporary storage hopper (32) works in conjunction with the airlock (33) to achieve the function of sucking in small particle crystals.

8. The continuous ball mill screening method with controllable output ratio according to claim 3, characterized in that: In S6, the ball mill defective material temporary storage bin (28) works in conjunction with the airlock (30) to realize the function of sucking in the ball mill defective material.

9. The continuous ball mill screening method with controllable output ratio according to claim 3, characterized in that: In S8, the ball mill coarse material storage bin (8) works in conjunction with the airlock (4) to realize the ball mill coarse material suction function.

10. The continuous ball mill screening method with controllable output ratio according to claim 3, characterized in that: In S9, the weighing sensor (1) weighs the ball mill coarse material in the ball mill coarse material storage bin (2) and feeds the data back to the PLC control system.

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