Automatic high-capacity steel ball distributing and adding system of ball mill

Abstract

The invention discloses an automatic high-capacity steel ball distributing and adding system for a ball mill, which relates to the technical field of ore grinding of metal mine ball mills and comprises a ball conveying vehicle, a high-capacity intelligent ball storage bin, a conveying system, an automatic ball adding machine and an automatic control system. According to the actual requirements of the ball mill, the automatic control system can control all the components to achieve reasonable adding of steel balls, reasonable matching of the steel balls is guaranteed, the ball consumption rule is met, reactive power consumption of the balls is reduced, the automatic ball adding machine is controlled through the automatic control system, timed quantitative matched ball adding and manual remote ball adding of the four kinds of steel balls can be achieved, and the automatic ball adding efficiency is improved. 30-60 tons of steel balls can be transported each time through the ball transporting vehicle, the self-unloading function is achieved, the crown block operation time is not occupied any more, 60 tons of steel balls can be stored in the large-capacity intelligent ball storage bin at a time, the manual operation frequency is greatly reduced, the labor intensity of workers is remarkably reduced, and the working efficiency of the workers is improved. And safety risks caused by the fact that the crown block is used for transporting the steel balls for a long time are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of ball mill grinding in metal mines, in particular to an automatic ball distribution and adding system for large-capacity steel balls of a ball mill. Background Art

[0002] The grinding process of metal mines is the key step of pulverizing after the ore is crushed. Its main purpose is to grind the ore particles finely and improve the recovery rate of the ore. The efficiency and effect of the grinding process are affected by the hardness, toughness, shape and other factors of the ore. It is necessary to select appropriate grinding equipment and process parameters according to the specific situation. Ball milling is an important part of the metal ore dressing process. The ball mill is the main equipment in the grinding process. Steel balls are added as grinding media in the ball mill to smash, squeeze, grind and crush the ore in the mill. Reasonable steel ball filling rate and ball diameter ratio can not only improve the grinding efficiency of the mill, but also help to reduce ball consumption. With the continuous increase in production capacity and the development trend of large-scale mineral processing equipment, more and more large-scale ball mills are configured in the grinding and selection industrial site, and the amount of steel balls that need to be supplemented every day is as high as dozens of tons.

[0003] However, in the prior art, the ball mill is added manually every day. The traditional method of adding balls to the mill is to add them manually at a time. However, this method does not conform to the law of ball consumption in the mill. The density of the steel balls added to the mill at one time is too high, and part of the wear of the balls is not used for grinding, resulting in serious mutual wear, increased reactive power consumption of the balls, and high labor intensity, long crane occupancy time, many safety hazards, and unreasonable ratio of steel ball sizes in the mill. Therefore, it is necessary to propose a large-capacity steel ball automatic ball distribution and addition system for a ball mill to solve the problems in the prior art. Summary of the invention

[0004] The purpose of the present invention is to make up for the shortcomings of the prior art and to provide a large-capacity steel ball automatic ball distribution and addition system for a ball mill. The system solves the problems in the prior art that the ordinary automatic ball adding machine for the ball mill has a small storage capacity and can only add one type of steel ball at a time. The overhead crane needs to be frequently used to add steel balls to the ball adding machine, which results in a large workload for personnel and a large amount of machinery used. The ordinary ball adding machine is added manually and concentratedly every day, which results in high labor intensity and a long time for occupying the overhead crane.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a large-capacity steel ball automatic ball distribution and adding system for a ball mill, the system comprising a ball transport vehicle, a large-capacity intelligent ball storage bin, a conveying system, an automatic ball adding machine and an automatic control system;

[0006] The ball transporter is used to transport steel balls into the system. The ball transporter can transport 30-60t of steel balls each time. It has a self-unloading function and can transport steel balls within a specific specification range. It is also equipped with an automatic alarm device for no balls in the steel ball bin and an automatic reporting device for full steel ball bin.

[0007] The large-capacity intelligent ball storage bin is used to store steel balls, and includes a large-capacity ball storage bin body, an inlet hole, an anti-blocking device, a ball adding amount control device and a steel ball funnel. The inlet hole adopts a specially calculated channel, and the size and shape of the channel meet the requirements of smooth passage of steel balls without causing the steel balls to get stuck.

[0008] The conveying system is used to convey the steel balls from the storage device to the automatic ball adding machine;

[0009] The automatic ball adding machine is used for automatically matching and adding steel balls. It is composed of four sets of small ball storage bins and a reduction motor. It is controlled by an automatic control system to achieve timed and quantitative matching of ball adding and manual remote ball adding in the main control room. It can also record the ball adding situation, form a historical curve, and form daily, weekly, monthly and annual ball adding reports.

[0010] The automatic control system consists of a PLC module, a counter, a camera, an air source distributor, an electrical control cabinet, a ball presence alarm device, a separate control system for a ball adding machine, a separate control system for a ball replenishing bin and a ball milling monitoring system.

[0011] Furthermore, the main body of the large-capacity ball storage bin is divided into four chambers, the bottom plate and side wall of each chamber are made of 8 mm steel plate, and the chamber bottom plate has a certain inclination angle, which is greater than 13 degrees and less than 22 degrees. Each chamber is used to store steel balls of different diameters. The steel balls are concentrated at the entrance hole after vertical and horizontal sliding due to their own shape and gravity. Each chamber can store 15 tons of steel balls.

[0012] Furthermore, the anti-blocking device is composed of an entrance hole control plate, a vibration motor and a vibration plate. The entrance hole control plate is used to generate a vibration force on the wall of the ball storage bin when the vibration motor is started. The vibration motor is started when the ball mill needs to add steel balls. The vibration force of the vibration motor is adjustable, and the steel balls can pass through the entrance hole through vibration.

[0013] Furthermore, the ball adding amount control device is composed of a slide cylinder and a steel ball control bucket. The slide cylinder is fixed on the warehouse wall column, and the automatic control system controls the opening and closing of the solenoid valve to achieve extension and retraction. When receiving the start ball replenishment signal, the slide cylinder opens to make the steel ball control bucket flat, forming a unified slide with the steel ball slide, so that the steel balls can pass smoothly into the steel ball funnel. When receiving the stop ball replenishment signal, the cylinder contracts to retract the control bucket, and the slide forms an inclination of 150 degrees, so that the steel balls on the slide and the entrance of the ball storage bin form a new friction balance to block the addition of steel balls.

[0014] Furthermore, the steel ball funnel is composed of a steel ball chute, a funnel inlet, a funnel outlet and a steel ball block. The steel ball chute is used to guide the steel balls into the funnel inlet, the funnel inlet is used to receive the steel balls from the ball adding amount control device, the funnel outlet is used to send the steel balls out of the funnel, and the steel ball block is located inside the funnel to cushion the steel balls and reduce the impact on the pipeline. The steel balls flow out of the funnel outlet and enter the conveying pipeline.

[0015] Furthermore, the conveying system is composed of four conveying pipes of different specifications, which utilize the height difference of the terrain to allow the steel balls to flow freely into four sets of small ball storage bins of the lower-level automatic ball adding machine, and the outside of the conveying pipes is wrapped with sound insulation materials.

[0016] Furthermore, the automatic control system is used to collect ball mill grinding operation data, determine whether to add balls and the specific ratio and amount of balls to be added according to a pre-input judgment program, and issue a ball adding instruction to start the automatic ball adding machine when it is determined that balls need to be added, and issue an opening instruction to the ball adding amount control device when the automatic ball adding machine alarms that the ball amount is insufficient, so that the steel ball control bucket is lowered, the steel ball chute forms a passage, and the relevant power components of the anti-blocking device are started, so that the vibration plate transmits the vibration force to the steel ball storage device, breaking the friction balance between the steel balls, so that the steel balls pass through the entrance hole into the steel ball chute and funnel, and then enter the small ball storage bin of the automatic ball adding machine through the conveying pipeline. When the small ball storage bin of the automatic ball adding machine is filled with steel balls, the relevant power components of the anti-blocking device and the ball adding control slide are closed in sequence to complete the ball adding work.

[0017] Furthermore, the anti-blocking device also includes a side limiting groove and a bottom limiting block, which are used to control the vibration plate so that the vibration range of the vibration plate is controllable.

[0018] Furthermore, the system also includes a ball mill grinding effect monitoring device, which is used to monitor the effects of the friction and smashing action between the steel balls and the iron ore after the ball mill flows into the ball mill. By monitoring the current and grinding sound when the ball mill is in use, and feeding back the monitoring results to the automatic control system, it is possible to determine whether balls need to be added and to determine the specific amount of balls added and the matching amount.

[0019] Compared with the existing technology, the ball mill large-capacity steel ball automatic ball distribution and addition system has the following beneficial effects:

[0020] The present invention can realize reasonable addition of steel balls according to the actual needs of the ball mill by controlling various components through the automatic control system, ensure the reasonable ratio of steel balls, comply with the ball consumption law, and reduce the reactive consumption of balls. The automatic ball adding machine can realize the timed and quantitative matching ball adding of four kinds of steel balls and manual remote ball adding through the automatic control system, which is beneficial to improving the grinding efficiency. The ball transporter can transport 30-60 tons of steel balls each time, has the function of self-unloading, and no longer occupies the operation time of the overhead crane. The large-capacity intelligent ball storage bin can store 60 tons of steel balls at a time, which greatly reduces the frequency of manual operation, significantly reduces the labor intensity of workers, and avoids the safety risks caused by the overhead crane being used for steel ball transportation for a long time.

[0021] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A top view of an automatic ball distribution and adding system for large-capacity steel balls in a ball mill;

[0024] Figure 2 This is a front view of an automatic ball distribution and adding system for large-capacity steel balls in a ball mill;

[0025] Figure 3 It is a structural schematic diagram of an automatic ball distribution and anti-clogging device for adding a large-capacity steel ball of a ball mill;

[0026] Figure 4 It is a structural schematic diagram of a device for automatically distributing and adding balls to a large-capacity steel ball adding system of a ball mill;

[0027] Figure 5 It is a structural schematic diagram of a steel ball hopper of a large-capacity steel ball automatic ball distribution and adding system of a ball mill;

[0028] Figure 6 This is a three-view drawing of an automatic ball adding machine for a ball mill with large capacity steel balls and an automatic ball adding system.

[0029] In the figure: 1. Ball carrier; 2. Large-capacity ball storage bin body; 3. Entrance hole; 4. Anti-blocking device; 4-1. Side limiting groove; 4-2. Vibrating plate; 4-3. Bottom limiting block; 4-4. Vibrating motor; 5. Ball adding quantity control device; 5-1. Slide cylinder; 5-2. Steel ball control bucket; 5-3. Bin wall column; 6. Steel ball hopper; 6-1. Steel ball chute; 6-2. Funnel inlet; 6-3. Funnel outlet; 6-4. Steel ball block; 7. Conveying pipeline; 8. Automatic ball adding machine; 8-1. Small ball storage bin; 8-2. Reducer motor; 9. Ball mill; 10. Electrical control cabinet. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] The present embodiment relates to a large-capacity steel ball automatic ball distribution and addition system for a ball mill, comprising a ball transport vehicle 1, a large-capacity intelligent ball storage bin, a conveying system, an automatic ball adding machine 8, a ball mill grinding effect monitoring device and an automatic control system.

[0033] The ball transporter 1 can transport 30-60t steel balls each time and has a self-unloading function. It will automatically alarm when there is no ball in the steel ball bin and automatically report when it is full. During the operation of the ball mill 9, if there is a lack of steel balls to assist in crushing, the material crushing particles will be large and cannot enter the next step in time, reducing production efficiency. At this time, the ball transporter 1 will transport the steel balls to the system to prepare for the subsequent addition of steel balls.

[0034] The large-capacity intelligent ball storage bin includes a large-capacity ball storage bin body 2, an entrance hole 3, an anti-blocking device 4, a ball adding amount control device 5 and a steel ball funnel 6. The large-capacity ball storage bin body 2 is divided into four chambers. The bottom plate and side wall of each chamber are made of 8 mm steel plate, and the chamber bottom plate has a certain inclination angle greater than 13 degrees and less than 22 degrees. Each chamber is used to store steel balls of different diameters. The steel balls are concentrated to the entrance hole 3 after vertical and horizontal sliding due to their own shape and gravity. Each chamber can store 15 tons of steel balls. During the operation of the ball mill 9, the steel balls are prepared in the ball storage bin according to their own characteristics, waiting to be added to the ball mill 9. The entrance hole 3 adopts a specially calculated channel to meet the needs of the steel balls to pass through without getting stuck. When the ball mill 9 needs steel balls, the steel balls can smoothly pass through the entrance hole 3 and enter the subsequent device.

[0035] The anti-blocking device 4 is composed of an inlet hole control plate, a vibration motor 4-4 and a vibration plate 4-2. The inlet hole control plate is used to generate a vibration force on the wall of the ball storage bin when the vibration motor 4-4 is started. The vibration motor 4-4 is started when the ball mill 9 needs to add steel balls. The vibration force can be adjusted to adjust the vibration force of the vibration plate 4-2. The steel balls can pass through the inlet hole 3 through vibration. When the ball mill 9 needs steel balls and the steel balls tend to be congested at the inlet hole 3, the anti-blocking device 4 is started to ensure that the steel balls can continue to enter the ball adding control device 5.

[0036] The ball adding amount control device 5 is composed of a slide cylinder 5-1 and a steel ball control bucket 5-2. The slide cylinder 5-1 is fixed on the warehouse wall column 5-3, and the PLC system controls the opening and closing of the electromagnetic valve to achieve extension and contraction. When the automatic control device gives a signal to start adding balls, the slide cylinder 5-1 opens to make the steel ball control bucket 5-2 flat, forming a unified slide with the steel ball slide, and the steel balls smoothly pass through the control device into the steel ball funnel 6. When the system sends a signal to stop adding balls, the cylinder contracts to make the control bucket retract, and the slide forms an inclination of 150 degrees, so that the steel balls on the slide and the entrance of the ball storage bin form a new friction balance to block the addition of steel balls. According to the actual needs of the ball mill 9, the ball adding amount control device 5 accurately controls the amount of steel balls added.

[0037] The steel ball funnel 6 is composed of a steel ball chute 6-1, a funnel inlet 6-2, a funnel outlet 6-3 and a steel ball block 6-4. The steel ball chute 6-1 is used to guide the steel balls into the funnel inlet 6-2. The funnel inlet 6-2 is used to receive the steel balls from the ball adding amount control device 5. The funnel outlet 6-3 is used to send the steel balls out of the funnel. The steel ball block 6-4 is located inside the funnel and is used to cushion the steel balls and reduce the impact on the pipeline. The steel balls flow out from the funnel outlet 6-3 and enter the conveying pipeline 7.

[0038] The conveying system is composed of conveying pipes 7 of different specifications. The height difference is used to allow the steel balls to flow freely into the lower-level automatic ball adding machine 8. The outside of the conveying pipes 7 is wrapped with sound insulation material. The conveying system conveys the steel balls flowing out of the steel ball funnel 6 to the automatic ball adding machine 8.

[0039] The automatic ball adding machine 8 is composed of four sets of small ball storage bins 8-1 and a steel ball transmission device. It is controlled by a PLC system and can add balls at a fixed time and quantity or manually and remotely. It also records the ball adding situation to form a historical curve and daily, weekly, monthly and annual reports on ball adding. The automatic ball adding machine 8 adds steel balls in a set manner according to the operating status and needs of the ball mill 9.

[0040] The ball mill grinding effect monitoring device monitors the effects of friction, throwing and other actions between the ball mill 9 and the iron ore after the steel balls flow into the ball mill 9. It monitors the current and grinding sound when the ball mill 9 is in use, and feeds back the monitoring results to the automatic control system to determine whether balls need to be added and to determine the specific amount of balls added and the matching amount. During the operation of the ball mill 9, the grinding effect is monitored in real time. When it is found that insufficient steel balls affect the grinding efficiency, timely feedback is given to the automatic control system.

[0041] The automatic control system is composed of a PLC module, a counter, a camera, an air source distributor, an electrical control cabinet 10, a ball alarm, a separate control system for a ball adding machine, a separate control system for a ball replenishing bin, and a ball milling monitoring system. It collects the grinding operation data of the ball mill 9, determines whether to add balls and the specific proportion and amount of balls added according to a pre-input judgment program, issues a ball adding instruction to start the ball adding machine when it is determined that balls need to be added, and starts the relevant supplementary components of the steel ball storage device when the ball adding machine alarms that the ball amount is insufficient, and simultaneously issues an opening instruction to the ball adding amount control device 5 to lower the steel ball control bucket 5-2, form a passage for the steel ball chute 6-1, and start the relevant power components of the anti-blocking device 4 to make the vibration plate 4- 2 transmits the vibration force to the steel ball storage device, breaks the friction balance between the steel balls, and allows the steel balls to enter the steel ball chute 6-1 and the funnel through the inlet hole 3, and then enter the ball bin of the ball adding machine through the conveying pipe 7. When the ball bin of the ball adding machine is filled with steel balls, the relevant power components of the anti-blocking device 4 and the ball adding control chute wall are closed in turn to form a vibration force, so that the steel balls can enter the ball adding amount control device 5 through the inlet hole 3. The steel balls smoothly pass through the control device into the steel ball funnel 6, and then enter the conveying pipe 7, and finally reach the ball bin of the automatic ball adding machine 8, ensuring the continuous supply of steel balls, so that the ball mill 9 and the ore can reach the best ratio in real time, and at the same time, the four types of steel balls can be well matched, thereby accelerating material crushing and improving production efficiency.

[0042] The large-capacity steel ball automatic matching and adding system of the ball mill 9 adds balls uniformly and continuously, which is beneficial to the reasonable ratio of steel balls in the ball mill. This is because the automatic ball adding machine 8 is composed of four sets of small ball storage bins 8-1 and steel ball transmission devices. It is controlled by the PLC system and can accurately control the ratio and addition amount of steel balls according to the operating status and needs of the ball mill 9. At the same time, the ball mill grinding effect monitoring device monitors the grinding effect in real time and feeds back to the automatic control system. The automatic control system further adjusts the ratio and addition amount of steel balls according to the feedback, which is more beneficial to the grinding efficiency of the ball mill 9. For example, the grinding efficiency reaches 1.04t / h, which is 0.05t / h higher than 0.96t / h before the ball adding machine is used. The mill efficiency is increased by 5.2% compared with the one-time addition of steel balls every day.

[0043] After the ball mill 9 is evenly filled with steel balls, the reactive consumption of the ball mill 9 is reduced, resulting in a reduction in the ball consumption of the ball mill 9, saving 3%. This is because the ball mill grinding effect monitoring device monitors the operating status of the ball mill 9 in real time. When it is found that the reactive consumption of the ball mill 9 is too high, the automatic control system adjusts the addition amount and ratio of the steel balls according to the monitoring results, so that the distribution of the steel balls in the ball mill 9 is more reasonable, reducing unnecessary wear and consumption, thereby reducing the ball consumption of the ball mill 9.

[0044] Embodiment 2

[0045] The present embodiment relates to a large-capacity steel ball automatic ball distribution and addition system for a ball mill, comprising a ball transport vehicle 1, a large-capacity intelligent ball storage bin, a conveying system, an automatic ball adding machine 8, a ball mill grinding effect monitoring device and an automatic control system.

[0046] The ball transporter 1 can transport 30-60t steel balls each time and has a self-unloading function. It will automatically alarm when there is no ball in the steel ball bin and automatically report when it is full. During the operation of the ball mill 9, if there is a lack of steel balls to assist in crushing, the material crushing particles are large and cannot enter the next step in time, which reduces production efficiency. At this time, the ball transporter 1 transports the steel balls to the system to prepare for subsequent steel ball addition. During the operation of the ball mill 9, personnel add four tons of balls every three shifts for 24 hours, which takes about two hours. This manual ball adding method is inefficient and labor-intensive. When the large-capacity steel ball automatic adding system of the ball mill 9 is put into use, the ball transporter 1 transports the steel balls to the system.

[0047] The large-capacity intelligent ball storage bin comprises a large-capacity ball storage bin body 2, an inlet hole 3, an anti-blocking device 4, a ball adding amount control device 5 and a steel ball funnel 6.

[0048] The main body 2 of the large-capacity ball storage bin is divided into four chambers. The bottom plate and side wall of each chamber are made of 8 mm steel plate, and the bottom plate of the chamber has a certain inclination angle greater than 13 degrees and less than 22 degrees. Each chamber is used to store steel balls of different diameters. The steel balls are concentrated to the entrance hole 3 after vertical and horizontal sliding due to their own shape and gravity. Each chamber can store 15 tons of steel balls. During the operation of the ball mill 9, the steel balls are prepared in the ball storage bin according to their own characteristics, waiting to be added to the ball mill 9.

[0049] The inlet hole 3 adopts a specially calculated channel to meet the requirements of steel balls passing through without getting stuck. When the ball mill 9 needs steel balls, the steel balls can smoothly pass through the inlet hole 3 and enter the subsequent device.

[0050] The anti-blocking device 4 is composed of an inlet hole control plate, a vibration motor 4-4 and a vibration plate 4-2. The inlet hole control plate is used to generate a vibration force on the wall of the ball storage bin when the vibration motor 4-4 is started. The vibration motor 4-4 is started when the ball mill 9 needs to add steel balls. The vibration force can be adjusted to adjust the vibration force of the vibration plate 4-2. The steel balls can pass through the inlet hole 3 through vibration. When the ball mill 9 needs steel balls and the steel balls tend to be congested at the inlet hole 3, the anti-blocking device 4 is started to ensure that the steel balls can continue to enter the ball adding control device 5.

[0051] The ball adding amount control device 5 is composed of a slide cylinder 5-1 and a steel ball control bucket 5-2. The slide cylinder 5-1 is fixed on the warehouse wall column 5-3, and the PLC system controls the opening and closing of the electromagnetic valve to achieve extension and contraction. When the automatic control device gives a signal to start adding balls, the slide cylinder 5-1 opens to make the steel ball control bucket 5-2 flat, forming a unified slide with the steel ball slide, and the steel balls smoothly pass through the control device into the steel ball funnel 6. When the system sends a signal to stop adding balls, the cylinder contracts to make the control bucket retract, and the slide forms an inclination of 150 degrees, so that the steel balls on the slide and the entrance of the ball storage bin form a new friction balance to block the addition of steel balls. According to the actual needs of the ball mill 9, the ball adding amount control device 5 accurately controls the amount of steel balls added.

[0052] The steel ball funnel 6 is composed of a steel ball chute 6-1, a funnel inlet 6-2, a funnel outlet 6-3 and a steel ball block 6-4. The steel ball chute 6-1 is used to guide the steel balls into the funnel inlet 6-2. The funnel inlet 6-2 is used to receive the steel balls from the ball adding amount control device 5. The funnel outlet 6-3 is used to send the steel balls out of the funnel. The steel ball block 6-4 is located inside the funnel and is used to cushion the steel balls and reduce the impact on the pipeline. The steel balls flow out from the funnel outlet 6-3 and enter the conveying pipeline 7.

[0053] The conveying system is composed of conveying pipes 7 of different specifications. The height difference is used to allow the steel balls to flow freely into the lower-level automatic ball adding machine 8. The outside of the conveying pipes 7 is wrapped with sound insulation material. The conveying system conveys the steel balls flowing out of the steel ball funnel 6 to the automatic ball adding machine 8.

[0054] The automatic ball adding machine 8 is composed of four sets of small ball storage bins 8-1 and a steel ball transmission device. It is controlled by a PLC system and can add balls at a fixed time and quantity or manually and remotely. It also records the ball adding situation to form a historical curve and daily, weekly, monthly and annual reports on ball adding. The automatic ball adding machine 8 adds steel balls in a set manner according to the operating status and needs of the ball mill 9.

[0055] The ball mill grinding effect monitoring device monitors the effects of friction, throwing and other actions between the ball mill 9 and the iron ore after the steel balls flow into the ball mill 9. It monitors the current and grinding sound when the ball mill 9 is in use, and feeds back the monitoring results to the automatic control system to determine whether balls need to be added and to determine the specific amount of balls added and the matching amount. During the operation of the ball mill 9, the grinding effect is monitored in real time. When it is found that insufficient steel balls affect the grinding efficiency, timely feedback is given to the automatic control system.

[0056] The automatic control system collects the grinding operation data of the ball mill 9, determines whether to add balls and the specific proportion and amount of balls added according to the judgment program input in advance, and issues a ball adding instruction to start the ball adding machine when it is determined that balls need to be added, and starts the relevant supplementary components of the steel ball storage device when the ball adding machine alarms that the ball amount is insufficient, and at the same time issues an opening instruction to the ball adding amount control device 5, so that the steel ball control bucket 5-2 is lowered, the steel ball chute 6-1 forms a passage, and the relevant power components of the anti-blocking device 4 are started, so that the vibration plate 4-2 transmits the vibration force to the steel ball storage device, breaking the friction balance between the steel balls, so that the steel balls pass through the inlet hole 3 into the steel ball chute 6-1 and the funnel, and then enter the ball bin of the ball adding machine through the conveying pipe 7. When the ball bin of the ball adding machine is full of steel balls, the relevant power components of the anti-blocking device 4 and the ball adding control chute wall are closed in turn to form a vibration force, so that the steel balls can pass through the inlet hole 3 into the ball adding amount control device 5, and the steel balls smoothly pass through the control device into the steel ball funnel 6, and then enter the conveying pipe 7, and finally reach the ball bin of the automatic ball adding machine 8.

[0057] The staff adds 60 tons of steel balls to the steel ball bin each time, and replenishes steel balls once every 15 days. This is because the large-capacity ball storage bin body 2 of the large-capacity intelligent ball storage bin has four chambers, each of which can store 15 tons of steel balls, with a total storage capacity of 60 tons. When the ball mill 9 needs steel balls, the steel balls can be accurately and timely added to the ball mill 9 through the synergy of various components. Since the frequent manual addition of steel balls is reduced, 30 hours of labor is saved, and the overhead crane operation time is no longer occupied, thereby reducing safety accidents during the steel ball adding process.

[0058] After the ball mill 9 is evenly filled with steel balls, the reactive power consumption of the ball mill 9 is reduced, resulting in an increase in the storage space in the ball mill 9, which can increase the amount of ore input and increase production by 1%-3%. This is because when the reactive power consumption of the ball mill 9 is reduced, the space in the ball mill 9 is more reasonably utilized, so that the storage space can be expanded. At the same time, reasonable steel ball addition and ratio also help to improve the grinding efficiency of the ball mill 9, so that the ore can be crushed more efficiently, thereby increasing the amount of ore input and improving production.

[0059] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the same elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A large-capacity steel ball automatic ball distribution and addition system for a ball mill, characterized in that: The system comprises a ball transport vehicle (1), a large-capacity intelligent ball storage bin, a conveying system, an automatic ball adding machine (8) and an automatic control system; The ball transporter (1) is used to transport steel balls into the system. The ball transporter (1) can transport 30-60t of steel balls each time, has a self-unloading function, can transport steel balls within a specific specification range, and is provided with an automatic alarm device for no balls in the steel ball bin and an automatic reporting device for full steel ball bin; The large-capacity intelligent ball storage bin is used to store steel balls, and comprises a large-capacity ball storage bin body (2), an inlet hole (3), an anti-blocking device (4), a ball adding amount control device (5) and a steel ball funnel (6). The inlet hole (3) adopts a specially calculated channel, and the size and shape of the channel are sufficient for the steel balls to pass smoothly without causing the steel balls to get stuck. The conveying system is used to convey the steel balls from the storage device to the automatic ball adding machine (8); The automatic ball adding machine (8) is used for automatically matching and adding steel balls, and is composed of four sets of small ball storage bins (8-1) and a reduction motor (8-2). It is controlled by an automatic control system to achieve timed and quantitative matching and ball adding and manual and remote ball adding in a main control room, and can record ball adding conditions, form a historical curve, and form daily, weekly, monthly and annual ball adding reports; The automatic control system consists of a PLC module, a counter, a camera, an air source distributor, an electrical control cabinet (10), a ball presence alarm device, a separate control system for a ball adding machine, a separate control system for a ball replenishing bin and a ball milling monitoring system.

2. The large-capacity steel ball automatic ball distribution and addition system for a ball mill according to claim 1 is characterized in that: The large-capacity ball storage bin body (2) is divided into four bins. The bottom plate and side wall of each bin are made of 8 mm steel plate, and the bottom plate of the bin has a certain inclination angle. The inclination angle of the bottom plate of the bin is greater than 13 degrees and less than 22 degrees. Each bin is used to store steel balls of different diameters. The steel balls are concentrated to the entrance hole (3) after vertical and horizontal sliding due to their own shape and gravity. Each bin can store 15 tons of steel balls.

3. The large-capacity steel ball automatic ball distribution and addition system for a ball mill according to claim 1 is characterized in that: The anti-blocking device (4) is composed of an inlet hole control plate, a vibration motor (4-4) and a vibration plate (4-2). The inlet hole control plate is used to generate a vibration force on the wall of the ball storage bin when the vibration motor (4-4) is started. The vibration motor (4-4) is started when the ball mill (9) needs to add steel balls. The vibration force of the vibration motor (4-4) is adjustable, and the steel balls can pass through the inlet hole (3) through vibration.

4. The large-capacity steel ball automatic ball distribution and addition system for a ball mill according to claim 1 is characterized in that: The ball adding amount control device (5) is composed of a slide cylinder (5-1) and a steel ball control bucket (5-2). The slide cylinder (5-1) is fixed on the warehouse wall column (5-3), and the automatic control system controls the opening and closing of the electromagnetic valve to achieve extension and contraction. When receiving a start ball replenishment signal, the slide cylinder (5-1) opens to make the steel ball control bucket (5-2) flat, forming a unified slide with the steel ball slide, so that the steel balls can smoothly pass into the steel ball funnel (6). When receiving a stop ball replenishment signal, the cylinder contracts to retract the control bucket, and the slide forms an inclination angle of 150 degrees, so that the steel balls on the slide and the entrance of the ball storage warehouse form a new friction balance to block the addition of steel balls.

5. The large-capacity steel ball automatic ball distribution and addition system for a ball mill according to claim 1 is characterized in that: The steel ball funnel (6) is composed of a steel ball chute (6-1), a funnel inlet (6-2), a funnel outlet (6-3) and a steel ball block (6-4); the steel ball chute (6-1) is used to guide the steel balls into the funnel inlet (6-2); the funnel inlet (6-2) is used to receive the steel balls from the ball adding amount control device (5); the funnel outlet (6-3) is used to send the steel balls out of the funnel; the steel ball block (6-4) is located inside the funnel and is used to buffer the steel balls and reduce the impact on the pipeline; the steel balls flow out of the funnel outlet (6-3) and enter the conveying pipeline (7).

6. The large-capacity steel ball automatic ball distribution and addition system for a ball mill according to claim 1 is characterized in that: The conveying system is composed of four conveying pipes (7) of different specifications, which utilize the height difference of the terrain to allow the steel balls to flow freely into four sets of small ball storage bins (8-1) of the lower-level automatic ball adding machine (8), and the outside of the conveying pipes (7) is wrapped with sound insulation material.

7. The large-capacity steel ball automatic ball distribution and addition system for a ball mill according to claim 1 is characterized in that: The automatic control system is used to collect the grinding operation data of the ball mill (9), determine whether to add balls and the specific proportion of balls added according to the judgment program input in advance, issue a ball adding instruction to make the automatic ball adding machine (8) start working when it is determined that balls need to be added, and issue an opening instruction to the ball adding amount control device (5) when the automatic ball adding machine (8) warns that the ball amount is insufficient, so that the steel ball control bucket (5-2) is lowered, the steel ball chute (6-1) forms a passage, and the relevant power components of the anti-blocking device (4) are started, so that the vibration plate (4-2) transmits the vibration force to the steel ball storage device, breaks the friction balance between the steel balls, and makes the steel balls pass through the inlet hole (3) into the steel ball chute (6-1) and the funnel, and then enter the small ball storage bin (8-1) of the automatic ball adding machine (8) through the conveying pipeline (7). When the small ball storage bin (8-1) of the automatic ball adding machine (8) is filled with steel balls, the relevant power components of the anti-blocking device (4) and the ball adding control slide are sequentially closed, and the ball adding work is completed.

8. The large-capacity steel ball automatic ball distribution and addition system for a ball mill according to claim 3 is characterized in that: The anti-blocking device (4) further comprises a side limiting groove (4-1) and a bottom limiting block (4-3) for controlling the vibration plate (4-2) so that the vibration range of the vibration plate (4-2) is controllable.

9. The large-capacity steel ball automatic ball distribution and addition system for a ball mill according to claim 1 is characterized in that: The system also includes a ball mill grinding effect monitoring device, which is used to monitor the effect of the friction and smashing action between the ball mill (9) and the iron ore after the steel balls flow into the ball mill (9), and monitor the current and grinding sound when the ball mill (9) is in use, and feed back the monitoring results to the automatic control system to determine whether balls need to be added and determine the specific amount of balls added and the matching amount.

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