Continuous ball milling and screening system and method with controllable discharging proportion

Abstract

The continuous ball-milling screening system comprises a coarse material storage bin, a fine material storage bin, a ball-milled fine material temporary storage bin, a medium material transition temporary storage bin, a raw material temporary storage bin, a ball mill feeding temporary storage bin and a vibration screening cavity, and the vibration screening cavity comprises a first-stage rotary vibration screening cavity, a second-stage rotary vibration screening cavity, a third-stage rotary vibration screening cavity and a fourth-stage rotary vibration screening cavity; according to the system, a closed environment is formed by equipment and a stainless steel pipeline, materials can be conveyed in the closed pipeline through a fan and an air seal machine, crystal raw materials can be continuously added for ball milling, powder with different particle sizes can be screened out at the same time, and the materials with different particle sizes generated through screening can be weighed through the system; the system can control the output of powder with different granularities according to a set proportion by means of a reversing valve, and the system can convey the produced excessive powder back to the ball mill again for ball milling according to a weighing sensor and a PLC control system.

Description

Technical Field

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

[0002] Calcium fluoride crucible is used as a reaction container for a certain product. Its production and preparation requires the use of coarse, medium and fine calcium fluoride crystals as raw materials. It is obtained by directly purchasing granular calcium fluoride crystals through ball milling and screening processes. The use ratio of coarse, medium and fine crystals is strictly limited by process parameters.

[0003] In the current production process, a jar mill is used for ball milling of raw materials, and a rotary vibrating screen is used for screening. At the same time, the jar mill can only process a rated amount of raw materials in one operation cycle, and the production capacity is limited. The jar mill can only control parameters such as the filling amount, ball milling speed, and ball milling time. The ball milling degree of the raw materials is difficult to control. In the actual process, after the raw materials are ball milled according to the set process parameters, the ratio of coarse, medium, and fine materials obtained by screening is inconsistent with the ratio of the three materials required for the preparation of calcium fluoride crucibles, resulting in invalid proportioned materials, and the larger particle size materials obtained after screening need to be ball milled again (for example, the proportion of the proportion of the materials used to produce crucibles is: coarse material: medium material: fine material = 2:4:4, and the proportion of the materials obtained after a ball milling and screening cycle is: unqualified material: coarse material: medium material: fine material = 1:2:4:3, and the proportion of fine material is insufficient). At the same time, the operation of the two process equipment and the coordination between the equipment need to be done manually, which is cumbersome and labor-intensive, time-consuming and labor-intensive.

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

[0005] The purpose of the present invention is to: in view of the shortcomings of the prior art, the present invention provides a continuous ball mill screening system and method with controllable discharge ratio, so as to solve the problems of low production capacity, uncontrollable discharge ratio and high labor intensity in the existing ball mill screening technology.

[0006] The technical scheme of the present invention is as follows: a continuous ball mill screening system with controllable discharging ratio, comprising 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 comprises 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 bin is connected to the coarse material temporary storage bin through the air lock B, the coarse material storage bin is equipped with a weighing sensor A, the coarse material temporary storage bin is equipped with a fan A, the coarse material temporary storage bin is connected to the reversing valve A, the reversing valve A is connected to the coarse material transition temporary storage bin and the secondary rotary vibration screen cavity at the same time, the coarse material transition temporary storage bin is connected to the ball mill feed temporary storage bin through the air lock A, and the coarse material transition temporary storage bin is equipped with a fan A;

[0008] The ball mill feed temporary storage bin is connected to the intermediate material transition temporary storage bin through an air lock E, the intermediate material transition temporary storage bin is equipped with a fan E, the intermediate material transition temporary storage bin is connected to a reversing valve B, the reversing valve B is simultaneously connected to the intermediate material temporary storage bin and the three-stage rotary vibration screen chamber, the intermediate material temporary storage bin is connected to the intermediate material storage bin 15 through an air lock D, and a weighing sensor C is installed on the intermediate material storage bin;

[0009] The ball mill feed temporary storage bin is also connected to the raw material temporary storage bin through the air lock F, and the raw material temporary storage bin is equipped with a fan B and a raw material port;

[0010] The temporary storage bin for feeding the ball mill is also connected to the temporary storage bin for ball milling unqualified materials through the air lock G. The temporary storage bin for ball milling unqualified materials is connected to the first-level rotary vibration screen chamber. A fan C is installed on the temporary storage bin for ball milling unqualified materials.

[0011] The ball mill feed temporary storage bin is connected to the continuous ball mill through a spiral push mechanism, the continuous ball mill is connected to the ball mill discharge temporary storage bin, the ball mill discharge temporary storage bin is connected to the rotary vibrating screen through an air lock H, and a fan D is installed on the ball mill discharge temporary storage bin;

[0012] It also includes a fine material storage bin, which is connected to a ball mill fine material temporary storage bin through an air shutoff device C. The ball mill fine material temporary storage bin is equipped with a fan F, and the ball mill fine material temporary storage bin is connected to a four-stage rotary vibration screen chamber.

[0013] It also includes PLC control system control, which sets the proportion of coarse material, medium material and fine material in ball mill.

[0014] A continuous ball milling and screening method with controllable discharging ratio comprises the following steps:

[0015] S1: According to the weight of the crystal raw materials put into the raw material port, set the corresponding proportions of ball milling coarse materials, ball milling medium materials and ball milling fine materials;

[0016] S2: The crystal raw materials to be ball milled and screened are sucked into the ball mill feed temporary storage bin from the raw material inlet through the fan;

[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 ball mills the crystal raw material;

[0018] S4: The small crystal particles in the ball milling process are sucked into the vibrating screen through the fan;

[0019] S5: After being screened by the rotary vibrating screen, the unqualified materials from the ball mill flow out from the first-stage rotary vibrating screen cavity;

[0020] S6: The unqualified materials from the ball mill are sucked from the first-stage rotary vibration screen chamber into the temporary storage bin of the ball mill through the fan;

[0021] S7: After being screened by the rotary vibrating screen, the ball-milled coarse material flows out from the secondary rotary vibrating screen cavity;

[0022] S8: The ball mill coarse material is sucked from the secondary rotary vibration screen chamber into the ball mill coarse material storage silo through the fan;

[0023] S9: The weighing sensor weighs the coarse ball mill material in the coarse ball mill material storage bin. When the weighing reading reaches the set coarse ball mill material ratio, the reversing valve starts to close the pipeline leading to the coarse ball mill material storage bin and open the pipeline leading to the temporary storage bin for feeding the ball mill;

[0024] S10: After being screened by the rotary vibrating screen, the ball milled material flows out from the third-stage rotary vibrating screen cavity;

[0025] S11: The intermediate material of the ball mill is sucked from the third-stage rotary vibration screen chamber into the intermediate material storage silo of the ball mill through the fan;

[0026] S12: The weighing sensor weighs the intermediate material in the intermediate material storage bin. When the weighing reading reaches the set intermediate material ratio, the reversing valve starts to close the pipeline leading to the intermediate material storage bin and open the pipeline leading to the temporary storage bin for feeding the ball mill.

[0027] S13: After being screened by the rotary vibrating screen, the ball milled fine material flows out from the fourth-stage rotary vibrating screen cavity;

[0028] S14: The ball mill fine material is sucked from the fourth-stage rotary vibration screen chamber into the ball mill fine material storage silo through the fan.

[0029] In S1, the particle size range of the coarse material is 0.5-0.8 mm, the particle size range of the medium material is 0.1-0.5 mm, and the particle size range of the fine material is less than 0.1 mm.

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

[0031] In S2, the temporary storage bin for raw materials cooperates with the air lock to realize the crystal raw material suction function.

[0032] In S4, the ball mill discharge temporary storage bin cooperates with the air lock to realize the small particle crystal suction function.

[0033] In S6, the temporary storage bin for ball-milled unqualified materials cooperates with the air shutoff device to realize the function of sucking in the ball-milled unqualified materials.

[0034] In S8, the ball mill coarse material temporary storage bin cooperates with the air lock to realize the ball mill coarse material suction function.

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

[0036] The significant effects of the present invention are: the system is formed by various devices and stainless steel pipes to form a closed environment, the system can realize the transmission of materials in the closed pipe by relying on the fan and the air lock, the system can continuously add crystal raw materials for ball milling, the system can simultaneously screen out powders of different particle sizes, the system can weigh materials of different particle sizes produced by screening, the system can rely on the reversing valve to control the output of powders of different particle sizes according to the set ratio, the system can re-transport the excess powder produced back to the ball mill for ball milling, and according to the weighing sensor and the PLC control system, the system can produce materials of different particle sizes according to the set ratio. A continuous ball mill screening system and method with controllable discharging ratio provided by the present invention has beneficial effects including optimization of production process, only raw material filling is required during the process, and each component material in the system does not need to be repeatedly separated and filled. Beneficial effects include that the controllable discharging ratio can reduce the generation of invalid material components and reduce waste. Beneficial effects include that the self-enclosed circulation system can reduce dust leakage and reduce environmental pollution. Beneficial effects include optimizing process procedures and reducing manpower input. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of a continuous ball mill screening system with controllable discharge ratio;

[0038] In the figure: 1 weighing sensor A, 2 coarse material storage silo, 3 air shutoff device A, 4 air shutoff device B, 5 coarse material transition temporary 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 air shutoff device 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 air shutoff device D, 19 weighing sensor C, 20 fan E, 21 reversing valve B, 22 medium material transition temporary storage silo, 23 air shutoff device Device E, 24 fan F, 25 raw material temporary storage bin, 26 raw material outlet, 27 fan G, 28 ball mill unqualified material temporary storage bin, 29 air shut-off device F, 30 air shut-off device G, 31 fan H, 32 ball mill discharge temporary storage bin, 33 air shut-off device H, 34 first-stage rotary vibration screen chamber (ball mill unqualified material), 35 second-stage rotary vibration screen chamber (ball mill coarse material), 36 third-stage rotary vibration screen chamber (ball mill medium material), 37 fourth-stage rotary vibration screen chamber (ball mill fine material), 38 continuous ball mill, 39 spiral push mechanism, 40 ball mill feed temporary storage bin. DETAILED DESCRIPTION

[0039] Many specific details are described in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present application, so the present application is not limited by the specific implementation disclosed below.

[0040] The terms used in one or more embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of the present application. The singular forms of "a", "said" and "the" used in one or more embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of the present 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 the present application, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0042] A continuous ball mill screening system with controllable discharging ratio, comprising 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, wherein the vibrating screen chamber comprises a first-level rotary vibrating screen chamber 34 (ball milling unqualified material), a second-level rotary vibrating screen chamber 35 (ball milling coarse material), a third-level rotary vibrating screen chamber 36 (ball milling medium material), and a fourth-level rotary vibrating screen chamber 37 (ball milling fine material);

[0043] The coarse material storage bin 2 is connected to the coarse material temporary storage bin 8 through the air lock B4, the coarse material storage bin 2 is equipped with a weighing sensor A1, the coarse material temporary storage bin 8 is equipped with a fan A9, the coarse material temporary storage bin 8 is connected to the reversing valve A6, the reversing valve A6 is simultaneously connected to the coarse material transition temporary storage bin 5 and the secondary rotary vibration screen chamber 35, the coarse material transition temporary storage bin 5 is connected to the ball mill feed temporary storage bin 40 through the air lock A3, and the coarse material transition temporary storage bin 5 is equipped with a fan A7;

[0044] The ball mill feed temporary storage bin 40 is connected to the intermediate material transition temporary storage bin 22 through the air lock E23, the intermediate material transition temporary storage bin 22 is equipped with a fan E20, the intermediate material transition temporary storage bin 22 is connected to the reversing valve B21, the reversing valve B21 is simultaneously connected to the intermediate material temporary storage bin 16 and the three-stage rotary vibration screen chamber 36, the intermediate material temporary storage bin 16 is connected to the intermediate material storage bin 15 through the air lock D18, and the intermediate material storage bin 15 is equipped with a weighing sensor C19;

[0045] The ball mill feed temporary storage bin 40 is also connected to the raw material temporary storage bin 25 through the air lock F29, and the raw material temporary storage bin 25 is equipped with a fan B24 and a raw material port 26;

[0046] The ball mill feed temporary storage bin 40 is also connected to the ball mill unqualified material temporary storage bin 28 through the air lock G30, the ball mill unqualified material temporary storage bin 28 is connected to the first-level rotary vibration screen chamber 34, and the ball mill unqualified material temporary storage bin 28 is equipped with a fan C27;

[0047] The ball mill feed temporary storage bin 40 is connected to the continuous ball mill 38 through a spiral push mechanism 39, the continuous ball mill 38 is connected to the ball mill discharge temporary storage bin 32, the ball mill discharge temporary storage bin 32 is connected to the rotary vibrating screen through an air shutoff device H33, and a fan D31 is installed on the ball mill discharge temporary storage bin 32;

[0048] The fine material storage bin 11 is connected to the ball mill fine material temporary storage bin 13 through the air lock C12. The ball mill fine material temporary storage bin 13 is equipped with a fan F14. The ball mill fine material temporary storage bin 13 is connected to the four-stage rotary vibration screen chamber 37.

[0049] A continuous ball milling and screening method with controllable discharging ratio comprises the following steps:

[0050] 1) According to the weight of the crystal raw material put into the raw material port 26, the corresponding proportions of the ball milling coarse material, the ball milling medium material and the ball milling fine material are set in the central control PLC control system;

[0051] 2) The crystal raw materials to be ball-milled and screened are sucked into the ball mill feed temporary storage bin 40 from the raw material inlet 26 by the fan 24, and the raw material temporary storage bin 25 cooperates with the air lock 29 to realize the crystal raw material suction function;

[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 ball mills the crystal raw material;

[0053] 4) The small crystal particles in the ball milling process are sucked into the rotary vibrating screen by the fan 31, and the ball mill discharge temporary storage bin 32 cooperates with the air lock 33 to realize the small crystal particle suction function;

[0054] 5) After being screened by the rotary vibrating screen, the unqualified materials from the ball mill flow out from the first-stage rotary vibrating screen chamber 34;

[0055] 6) The unqualified materials are sucked from the first-stage rotary vibration screen chamber 34 to the temporary storage bin (40) of the ball mill through the fan 27. The temporary storage bin 28 of the unqualified materials is used in conjunction with the air lock 30 to realize the function of sucking the unqualified materials;

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

[0057] 8) The ball mill coarse material is sucked from the secondary rotary vibration screen chamber 35 into the ball mill coarse material storage bin 2 by the fan 9, and the ball mill coarse material temporary storage bin 8 cooperates with the air lock 4 to realize the ball mill coarse material suction function;

[0058] 9) The weighing sensor 1 weighs the coarse ball milling materials in the coarse ball milling material storage bin 2 and feeds the data back to the central control PLC. When the weighing reading reaches the set coarse ball milling material ratio, the reversing valve 6 starts to close the pipeline leading to the coarse ball milling material storage bin 2 and open the pipeline leading to the ball mill feed temporary storage bin 40;

[0059] 10) After being screened by the rotary vibrating screen, the ball milled material flows out from the third-stage rotary vibrating screen chamber 36;

[0060] 11) The intermediate material of the ball mill is sucked from the third-stage rotary vibration screen chamber 36 into the intermediate material storage bin 15 through the fan 17. The intermediate material temporary storage bin 16 cooperates with the air shutoff device 18 to realize the function of sucking the coarse material of the ball mill;

[0061] 12) The weighing sensor 19 weighs the intermediate material in the intermediate material storage bin 15 and feeds the data back to the central control PLC. When the weighing reading reaches the set intermediate material ratio, the reversing valve 21 starts to close the pipeline leading to the intermediate material storage bin 15 and open the pipeline leading to the ball mill feed temporary storage bin 40;

[0062] 13) After being screened by the rotary vibrating screen, the ball milled fine material flows out from the fourth-stage rotary vibrating screen chamber 37;

[0063] 14) The ball mill fine material is sucked from the fourth-stage rotary vibration screen chamber 37 into the ball mill fine material storage bin 11 through the fan 14, and the ball mill fine material temporary storage bin 13 cooperates with the air lock 12 to realize the ball mill coarse material suction function.

[0064] Embodiment 1:

[0065] The continuous ball mill screening system with controllable discharging ratio is designed with three-stage discharging. The coarse material size range is 0.5-0.8mm, the medium material size range is 0.1-0.5mm, the fine material size range is <0.1mm, and the three-stage discharging ratio of 2:3:5 is controllable.

[0066] The above description is only 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 should be included in the scope of protection of this patent.

[0067] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0068] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0069] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The optional embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can understand and use the present application well.

Claims

1. A continuous ball mill screening system with controllable discharge ratio, characterized in that: It comprises 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 sieve chamber, wherein the vibrating sieve chamber comprises a primary rotary vibrating sieve chamber (34), a secondary rotary vibrating sieve chamber (35), a tertiary rotary vibrating sieve chamber (36), and a quaternary rotary vibrating sieve chamber (37); The coarse material storage bin (2) is connected to the coarse material temporary storage bin (8) via an air shutoff device B (4); the coarse material storage bin (2) is equipped with a weighing sensor A (1); the coarse material temporary storage bin (8) is equipped with a fan A (9); the coarse material temporary storage bin (8) is connected to a reversing valve A (6); the reversing valve A (6) is simultaneously connected to the coarse material transition temporary storage bin (5) and the secondary rotary vibration screen chamber (35); the coarse material transition temporary storage bin (5) is connected to the ball mill feed temporary storage bin (40) via an air shutoff device A (3); and the coarse material transition temporary storage bin (5) is equipped with a fan A (7); The ball mill feed temporary storage bin (40) is connected to the intermediate material transition temporary storage bin (22) through an air lock E (23), the intermediate material transition temporary storage bin (22) is equipped with a fan E (20), the intermediate material transition temporary storage bin (22) is connected to a reversing valve B (21), the reversing valve B (21) is simultaneously connected to the intermediate material temporary storage bin (16) and the three-stage rotary vibration sieve chamber (36), the intermediate material temporary storage bin (16) is connected to the intermediate material storage bin (15) through an air lock D (18), and a weighing sensor C (19) is installed on the intermediate material storage bin (15); The ball mill feed temporary storage bin (40) is also connected to the raw material temporary storage bin (25) through an air lock F (29), and the raw material temporary storage bin (25) is equipped with a fan B (24) and a raw material port (26); The ball mill feed temporary storage bin (40) is also connected to the ball mill unqualified material temporary storage bin (28) through the air lock G (30), the ball mill unqualified material temporary storage bin (28) is connected to the first-level rotary vibration screen chamber (34), and a fan C (27) is installed on the ball mill unqualified material temporary storage bin (28); The ball mill feed temporary storage bin (40) is connected to the continuous ball mill (38) via a screw push mechanism (39), the continuous ball mill (38) is connected to the ball mill discharge temporary storage bin (32), the ball mill discharge temporary storage bin (32) is connected to the rotary vibrating screen via an air shutoff device H (33), and a fan D (31) is installed on the ball mill discharge temporary storage bin (32); The invention also comprises a fine material storage bin (11), the fine material storage bin (11) is connected to a ball mill fine material temporary storage bin (13) via an air lock C (12), a fan F (14) is installed in the ball mill fine material temporary storage bin (13), and the ball mill fine material temporary storage bin (13) is connected to a four-stage rotary vibration screen chamber (37).

2. A 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 proportion of coarse material, medium material and fine material in ball mill.

3. A continuous ball mill screening method with controllable discharge ratio, using the continuous ball mill screening system with controllable discharge ratio as claimed in claim 2, characterized in that: The following steps are involved: S1: according to the weight of the crystal raw material inputted from the raw material inlet (26), the proportions of the coarse material, the medium material and the fine material are set; S2: The crystal raw materials to be ball-milled and screened are sucked into the ball mill feed temporary storage bin (40) through the blower (24) from the raw material inlet (26); 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) ball mills the crystal raw material; S4: small crystal particles in the ball milling process are sucked into the rotary vibrating screen by the fan (31); S5: After being screened by the rotary vibrating screen, the unqualified materials after ball milling flow out from the first-stage rotary vibrating screen chamber (34); S6: The unqualified materials are sucked from the first-stage rotary vibration screen chamber (34) into the ball mill feed temporary storage bin (40) through the fan (27); S7: After being screened by the rotary vibrating screen, the ball-milled coarse material flows out from the secondary rotary vibrating screen chamber (35); S8: The ball mill coarse material is sucked from the secondary rotary vibration screen chamber (35) into the ball mill coarse material storage bin (2) by the fan (9); S9: The weighing sensor (1) weighs the coarse ball milling material in the coarse ball milling material storage bin (2). When the weighing reading reaches the set coarse ball milling material ratio, the reversing valve (6) is activated to close the pipeline leading to the coarse ball milling material storage bin (2) and open the pipeline leading to the ball mill feed temporary storage bin (40); S10: After being screened by the rotary vibrating screen, the ball milled material flows out from the third-stage rotary vibrating screen chamber (36); S11: The ball mill intermediate material is sucked from the third-stage rotary vibration screen chamber (36) into the ball mill intermediate material storage bin (15) through the fan (17); S12: The weighing sensor (19) weighs the intermediate material in the intermediate material storage bin (15). When the weighing reading reaches the set intermediate material ratio, the reversing valve (21) is activated to close the pipeline leading to the intermediate material storage bin (15) and open the pipeline leading to the temporary storage bin (40) for feeding the ball mill; S13: After being screened by the rotary vibrating screen, the ball-milled fine material flows out from the fourth-stage rotary vibrating screen chamber (37); S14: The ball mill fine material is sucked from the fourth-stage rotary vibration screen chamber (37) into the ball mill fine material storage bin (11) through the fan (14).

4. The continuous ball milling and screening method with controllable discharge ratio according to claim 3 is characterized in that: In S1, the particle size range of the coarse material is 0.5-0.8 mm, the particle size range of the medium material is 0.1-0.5 mm, and the particle size range of the fine material is less than 0.1 mm.

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

5.

6. The continuous ball milling and screening method with controllable discharge ratio according to claim 3, characterized in that: In S2, the temporary raw material storage bin (25) cooperates with the air lock (29) to realize the crystal raw material suction function.

7. The continuous ball milling and screening method with controllable discharge ratio according to claim 3, characterized in that: In S4, the ball mill discharge temporary storage bin (32) cooperates with the air lock (33) to realize the small particle crystal suction function.

8. The continuous ball milling and screening method with controllable discharge ratio according to claim 3, characterized in that: In S6, the temporary storage bin (28) for ball-milled unqualified materials cooperates with the air lock (30) to realize the function of sucking in the ball-milled unqualified materials.

9. The continuous ball milling and screening method with controllable discharge ratio according to claim 3, characterized in that: In the above S8, the ball mill coarse material temporary storage bin (8) cooperates with the air lock (4) to realize the ball mill coarse material suction function.

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

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