Device for ball-milling, recycling and grading zinc powder

Abstract

The utility model relates to the technical field of zinc powder conveying machinery, in particular to a device for ball-milling, recycling and grading zinc powder, which comprises a ball mill, the ball mill is connected with a driving device for driving the ball mill to rotate forwards or reversely, a zinc powder diversion module is arranged on the inner wall of a shell of the ball mill, and a zinc powder screening mechanism is arranged in the ball mill. The zinc powder screening mechanism comprises a scraping rod, a separating screen plate is arranged on a discharging end cover of the ball mill, the scraping rod is used for scraping bulk zinc powder on the separating screen plate, and the discharging end of the ball mill is sequentially communicated with a first grading device, a second grading device and a zinc powder conveying power device. The ball mill is arranged to scatter bulk zinc powder particles, then the zinc powder screening mechanism in the ball mill is used for screening scattered fine zinc powder, then the fine zinc powder sequentially passes through the first grading device and the second grading device to be subjected to grading recovery, and the problems of scattering and grading recovery of the bulk zinc powder particles are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of zinc powder conveying machinery, in particular to a device for ball milling, recycling and grading of zinc powder. Background Art

[0002] Zinc powder is a powdery substance made of metallic zinc. Zinc powder can be processed into ultrafine zinc powder. Ultrafine zinc powder has a series of advantages such as small particle size, high activity, less surface oxidation, narrow particle size distribution, and good dispersion performance. Ultrafine zinc powder is widely used in large steel components, ships, containers, aviation, automobiles and other industries as a key raw material for zinc-rich coatings and other high-performance coatings such as anti-corrosion and environmental protection.

[0003] In the production and preparation process of zinc powder, agglomerated zinc powder particles are generated by the aggregation of zinc powder in the links of condensation, transportation, screening and grading. These zinc particles cannot be directly classified by air flow to produce products that meet the particle size requirements. In the past, these agglomerated zinc powder particles were usually processed by crushing, pressing and then returning to the furnace for re-melting and evaporation. The whole process is relatively cumbersome and requires a lot of manual processing, which greatly affects the production efficiency of zinc powder. Therefore, a device for ball milling, recovery and grading of zinc powder is needed to solve the problem of breaking up and grading the agglomerated zinc powder particles. Utility Model Content

[0004] The invention purpose of the utility model is to provide a device for ball milling recovery and classification of zinc powder in order to solve the problem of breaking up and classifying and recovering agglomerated zinc particles generated in the zinc powder production process, wherein a ball mill is set to break up the agglomerated zinc powder particles, and then the zinc powder screening mechanism in the ball mill is used to screen the broken up fine zinc powder, and then the fine zinc powder is sequentially passed through a first classification device and a second classification device for classification and recovery, so as to solve the problem of breaking up and classifying and recovering agglomerated zinc powder particles.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a device for ball milling recovery and grading of zinc powder, comprising a ball mill, the ball mill is connected to a driving device for making it rotate forward or reverse, the inner wall of the ball mill shell is provided with a zinc powder diversion module, the zinc powder diversion module comprises a support plate, the support plate is provided with diversion ribs, a zinc powder screening mechanism is provided in the ball mill, the zinc powder screening mechanism comprises a scraper rod, a separation mesh plate is provided on the discharge end cover of the ball mill, the scraper rod is used to scrape off the agglomerated zinc powder on the separation mesh plate, and the discharge end of the ball mill is sequentially connected to a first grading device, a second grading device and a zinc powder transmission power device.

[0006] During the zinc powder production process, the generated agglomerated zinc powder particles are collected and put into the feed port of the ball mill. Under the negative pressure suction of the zinc powder transmission power device, the agglomerated zinc powder particles are sucked into the ball mill, and the driving device drives the ball mill to first rotate forward on the bearing support seat. Multiple zinc powder diversion modules divert the zinc powder particles and accumulate them at the front end of the ball mill. The forward rotation time of the ball mill is set. During the ball milling process, the agglomerated zinc particles are broken up, and the finer zinc powder can pass through the zinc powder screening mechanism for screening under the suction of negative pressure, and the fine zinc powder is sent to the first grading device and the second grading device in turn, and then classified and recovered. After reaching the set forward rotation time, it starts to reverse, and then under the guidance of the zinc powder diversion module and the suction of negative pressure, the zinc powder and the unbroken zinc particles in the ball mill are close to the separation screen together, and the separation screen will keep the large particles of zinc powder and wear-resistant steel balls in the ball mill.

[0007] As a preferred embodiment of the utility model, the first classification device is a cyclone dust collector, the second classification device is a bag dust collector, and the zinc powder transmission power device is a negative pressure fan. The cyclone dust collector uses the centrifugal force generated by the rotating airflow to separate the zinc powder particles in the gas. The coarser zinc powder entering the cyclone dust collector will be screened out, and the finer zinc powder will be sucked into the bag dust collector under the suction of the negative pressure fan. The bag dust collector can efficiently capture ultrafine zinc powder due to its structural design, which is conducive to the classification and recovery of ultrafine zinc powder.

[0008] As a preferred solution of the utility model, a feeding pipe is connected between the cyclone dust collector and the ball mill, a feeding pipe is also connected between the bag dust collector and the cyclone dust collector, and a negative pressure air duct is connected between the negative pressure fan and the bag dust collector. The use of pipes to connect the various devices is highly flexible, suitable for the arrangement of different positions, and has strong expansibility. When the sealing is good, the airflow inside the pipe is very stable.

[0009] As a preferred solution of the utility model, the support plate is provided with fixing studs for fixing the support plate and the guide ribs. The fixing studs fix the support plate to the inner wall of the ball mill housing and fix the guide ribs to the support plate.

[0010] As a preferred solution of the utility model, the guide ribs are of inclined design, and the guide ribs on multiple zinc powder guide modules are spliced ​​to form the internal threads of the ball mill shell. Through the rotation of the ball mill, the zinc powder in the ball mill is guided. The forward and reverse rotation of the ball mill is then used to accumulate the zinc powder in the ball mill to the front end of the ball mill and push it close to the separation screen.

[0011] As a preferred solution of the utility model, the zinc powder screening mechanism also includes a connecting rod, and a fixing frame is provided at both ends of the connecting rod, and the fixing frame is adapted to be provided with a fixed support seat. The fixing frame is mounted on the fixed support seat and remains stationary. When the ball mill rotates, the separation mesh plate will rotate with it because it is mounted on the discharge end cover, while the scraper rod is stationary. Through the relative rotation of the scraper rod and the separation mesh plate, the scraper rod can scrape off the zinc powder and zinc powder particles adhering to the separation mesh plate to prevent the separation mesh plate from being blocked. The scraper rod also plays a role in supporting the ball mill in the ball mill.

[0012] As a preferred solution of the utility model, the ball mill and the zinc powder screening mechanism are coaxially designed, so that the ball mill has a compact structure, good stability, can save space, and can ensure high coordinated efficiency of the scraper rod and the separation screen.

[0013] As a preferred solution of the utility model, the driving device is a motor, and a gearbox is provided between the motor and the ball mill, which can change the transmission ratio so that the ball mill can quickly switch to different production speeds and load requirements.

[0014] As a preferred embodiment of the present invention, the cyclone dust collector is provided with a cyclone dust collector discharge port at the bottom end, and the bag dust collector is provided with a bag dust collector discharge port at the bottom end. The cyclone dust collector will separate relatively coarse zinc powder through the cyclone dust collector discharge port, and the remaining ultrafine zinc powder will enter the bag dust collector through the feeding pipeline. The ultrafine zinc powder collected by the bag dust collector is discharged through the bag dust collector discharge port and transferred to the subsequent airflow classification system for further precise classification.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] 1. In the zinc powder production process, the generated agglomerated zinc powder particles are collected and put into the feed port of the ball mill. Under the negative pressure suction of the zinc powder transmission power device, the agglomerated zinc powder particles are sucked into the ball mill. The driving device drives the ball mill to first rotate forward on the bearing support seat. Multiple zinc powder diversion modules divert the zinc powder particles and accumulate them at the front end of the ball mill. The forward rotation time of the ball mill is set. In the process of ball milling, the agglomerated zinc particles are broken up. The finer zinc powder can pass through the zinc powder screening mechanism for screening under the suction of negative pressure, and the fine zinc powder is sent to the first grading device and the second grading device in turn, and then graded and recovered. After reaching the set forward rotation time, it starts to reverse. Then, under the diversion of the zinc powder diversion module and the suction of negative pressure, the zinc powder in the ball mill and the unbroken zinc particles are close to the separation screen together. The separation screen will leave the large particles of zinc powder and wear-resistant steel balls in the ball mill.

[0017] 2. The cyclone dust collector uses the centrifugal force generated by the rotating airflow to separate the zinc powder particles in the gas. The coarser zinc powder entering the cyclone dust collector will be screened out, and the finer zinc powder will be sucked into the bag dust collector under the suction of the negative pressure fan. The bag dust collector can efficiently capture ultrafine zinc powder due to its structural design, which is conducive to the graded recovery of ultrafine zinc powder.

[0018] 3. The use of pipes to connect the devices is highly flexible, suitable for layout in different locations, and has strong scalability. When the seal is good, the airflow inside the pipe is very stable.

[0019] 4. Fix the support plate to the inner wall of the ball mill shell with the fixing studs, and fix the guide ribs to the support plate.

[0020] 5. The guide ribs are designed to be inclined. The guide ribs on multiple zinc powder guide modules are spliced ​​to form the internal threads of the ball mill shell. Through the rotation of the ball mill, the zinc powder in the ball mill is guided. Then, the forward and reverse rotation of the ball mill is used to accumulate the zinc powder in the ball mill to the front end of the ball mill and push it close to the separation screen.

[0021] 6. The fixed frame is installed on the fixed support seat and remains motionless. When the ball mill rotates, the separation screen plate will rotate with it because it is installed on the discharge end cover, while the scraper rod is stationary. Through the relative rotation of the scraper rod and the separation screen plate, the scraper rod can scrape off the zinc powder and zinc powder particles adhering to the separation screen plate to prevent clogging of the separation screen plate. The scraper rod also plays a role in supporting the ball mill in the ball mill.

[0022] 7. The ball mill and the zinc powder screening mechanism are coaxially designed, which makes the ball mill compact and stable, saves space, and ensures high synergistic efficiency of the scraper rod and the separation screen.

[0023] 8. The driving device is a motor. A gearbox is provided between the motor and the ball mill, which can change the transmission ratio so that the ball mill can quickly switch to different production speeds and load requirements.

[0024] 9. The cyclone dust collector will separate the relatively coarse zinc powder through the cyclone dust collector discharge port, and the remaining ultrafine zinc powder will enter the bag dust collector through the feeding pipeline. The ultrafine zinc powder collected by the bag dust collector will be discharged through the bag dust collector discharge port and transferred to the subsequent airflow classification system for further precise classification. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the zinc powder screening mechanism of the utility model;

[0027] Figure 3It is a structural schematic diagram of the zinc powder guide module of the present utility model.

[0028] Markings in the figure: 1-motor, 2-gearbox, 3-ball mill, 3.1-discharge end cover, 3.2-separation screen, 4-zinc powder screening mechanism, 4.1-fixed frame, 4.2-connecting rod, 4.3-scraper rod, 5-zinc powder guide module, 5.1-fixed stud, 5.2-support plate, 5.3-guide rib, 6-fixed support seat, 7-bearing support seat, 8-feeding pipe, 9-cyclone dust collector, 9.1-cyclone dust collector discharge port, 10-bag dust collector, 10.1-bag dust collector discharge port, 11-negative pressure air duct, 12-negative pressure fan, 13-ball mill feed port. DETAILED DESCRIPTION

[0029] The utility model is described in detail below in conjunction with the accompanying drawings.

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0031] Example 1

[0032] like Figure 1-3 As shown, a device for ball milling recovery and classification of zinc powder in this embodiment includes a ball mill 3, which is connected to a driving device for rotating it forward or reversely. A zinc powder guide module 5 is provided on the inner wall of the outer shell of the ball mill 3, and the zinc powder guide module 5 includes a support plate 5.2, and a guide rib 5.3 is provided on the support plate 5.2. A zinc powder screening mechanism 4 is provided in the ball mill 3, and the zinc powder screening mechanism 4 includes a scraper rod 4.3. A separation mesh plate 3.2 is provided on the discharge end cover 3.1 of the ball mill 3, and the scraper rod 4.3 is used to scrape off the agglomerated zinc powder on the separation mesh plate 3.2. The discharge end of the ball mill 3 is sequentially connected to a first grading device, a second grading device and a zinc powder transmission power device.

[0033] During the zinc powder production process, the generated agglomerated zinc powder particles are collected and put into the feed port of the ball mill 3. Under the negative pressure suction of the zinc powder transmission power device, the agglomerated zinc powder particles are sucked into the ball mill 3. The driving device drives the ball mill 3 to first rotate forward on the bearing support seat 7. Multiple zinc powder diversion modules 5 divert the zinc powder particles and accumulate them at the front end of the ball mill 3. The forward rotation time of the ball mill 3 is set. During the ball milling process, the agglomerated zinc particles are broken up. The finer zinc powder can pass through the zinc powder screening mechanism 4 for screening under the suction of negative pressure, and the fine zinc powder is sent to the first grading device and the second grading device in turn, and then graded and recovered. After reaching the set forward rotation time, it starts to reverse. Then, under the guidance of the zinc powder diversion module 5 and the suction of negative pressure, the zinc powder in the ball mill 3 and the unbroken zinc particles are close to the separation screen 3.2 together, and the separation screen 3.2 will leave the large particles of zinc powder and wear-resistant steel balls in the ball mill 3.

[0034] Example 2

[0035] like Figure 1-3 As shown, according to a device for ball milling recovery and classification of zinc powder according to Example 1, the first classification device is a cyclone dust collector 9, the second classification device is a bag dust collector 10, and the zinc powder transmission power device is a negative pressure fan 11.

[0036] The cyclone dust collector 9 uses the centrifugal force generated by the rotating airflow to separate the zinc powder particles in the gas. The coarser zinc powder entering the cyclone dust collector 9 will be screened out, and the finer zinc powder will be sucked into the bag dust collector 10 under the suction of the negative pressure fan 11. The bag dust collector 10 can efficiently capture ultrafine zinc powder due to its structural design, which is beneficial to the graded recovery of ultrafine zinc powder.

[0037] Example 3

[0038] like Figure 1-3 As shown, according to a device for ball milling recovery and grading of zinc powder according to Example 2, a feeding pipe 8 is connected between the cyclone dust collector 9 and the ball mill 3, a feeding pipe 8 is also connected between the bag dust collector 10 and the cyclone dust collector 9, and a negative pressure air duct 11 is connected between the negative pressure fan 12 and the bag dust collector 10.

[0039] The use of pipes to connect the devices is highly flexible, suitable for layout in different locations, and has strong scalability. When well sealed, the airflow inside the pipe is very stable.

[0040] Example 4

[0041] like Figure 1-3 As shown, according to a device for ball milling recovery and classification of zinc powder according to Embodiment 3, a fixing stud 5.1 is provided on the support plate 5.2 for fixing the support plate 5.2 and the guide rib 5.3.

[0042] The fixing studs 5.1 fix the support plate 5.2 to the inner wall of the housing of the ball mill 3, and the guide ribs 5.3 are fixed to the support plate 5.2.

[0043] Example 5

[0044] like Figure 1-3 As shown, according to a device for ball milling recovery and grading of zinc powder according to Example 4, the guide ribs 5.3 are of inclined design, and the guide ribs 5.3 on multiple zinc powder guide modules 5 are spliced ​​to form the internal threads of the outer shell of the ball mill 3. Through the rotation of the ball mill 3, the zinc powder in the ball mill 3 is guided, and the forward and reverse rotation of the ball mill 3 is utilized to achieve the effect of accumulating the zinc powder in the ball mill 3 to the front end of the ball mill 3 and pushing it close to the separation screen plate 3.2.

[0045] Example 6

[0046] like Figure 1-3 As shown, according to a device for ball milling recovery and classification of zinc powder according to Example 5, the zinc powder screening mechanism also includes a connecting rod 4.2, and a fixing frame 4.1 is provided at both ends of the connecting rod 4.2, and the fixing frame 4.1 is adapted to be provided with a fixed support seat 6.

[0047] The fixed frame 4.1 is mounted on the fixed support seat 6 and remains stationary. When the ball mill 3 rotates, the separation screen plate 3.2 will rotate along with it because it is mounted on the discharge end cover 3.1, while the scraper rod 4.3 is stationary. Through the relative rotation of the scraper rod 4.3 and the separation screen plate 3.2, the scraper rod 4.3 can scrape off the zinc powder and zinc powder particles adhering to the separation screen plate 3.2 to prevent the separation screen plate 3.2 from being blocked. The scraper rod 4.3 also plays a role in supporting the ball mill 3 in the ball mill 3.

[0048] Example 7

[0049] like Figure 1-3 As shown, according to a device for ball milling recovery and grading of zinc powder according to Example 6, the ball mill 3 and the zinc powder screening mechanism 4 are coaxially designed, so that the ball mill 3 has a compact structure, good stability, can save space, and can ensure high coordinated efficiency of the scraper rod 4.3 and the separation screen 3.2.

[0050] Example 8

[0051] like Figure 1-3 As shown, according to a device for ball milling recovery and grading of zinc powder according to Example 7, the driving device is a motor 1, and a gearbox 2 is provided between the motor 1 and the ball mill 3, which can change the transmission ratio so that the ball mill 3 can quickly switch to different production speeds and load requirements.

[0052] Example 9

[0053] like Figure 1-3As shown, according to a device for ball milling, recovery and classification of zinc powder according to Example 8, a cyclone dust collector discharge port 9.1 is provided at the bottom end of the cyclone dust collector 9, and a bag dust collector discharge port 10.1 is provided at the bottom end of the bag dust collector 10.

[0054] The cyclone dust collector 9 will separate the relatively coarse zinc powder through the cyclone dust collector discharge port 9.1, and the remaining ultrafine zinc powder will enter the bag dust collector 10 through the feeding pipeline 8. The ultrafine zinc powder collected by the bag dust collector 10 will be discharged through the discharge port of the bag dust collector 10 and transferred to the subsequent airflow classification system for further precise classification.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for ball milling, recycling and grading zinc powder, comprising a ball mill, characterized in that: The ball mill is connected to a driving device for making it rotate forward or reverse. A zinc powder guide module is provided on the inner wall of the ball mill shell. The zinc powder guide module includes a support plate, and a guide rib is provided on the support plate. A zinc powder screening mechanism is provided in the ball mill, and the zinc powder screening mechanism includes a scraper rod. A separation mesh plate is provided on the discharge end cover of the ball mill, and the scraper rod is used to scrape off the agglomerated zinc powder on the separation mesh plate. The discharge end of the ball mill is sequentially connected to a first grading device, a second grading device and a zinc powder transmission power device.

2. The device for zinc powder ball milling recovery and classification according to claim 1, characterized in that: The first classification device is a cyclone dust collector, the second classification device is a bag dust collector, and the zinc powder transmission power device is a negative pressure fan.

3. The device for zinc powder ball milling recovery and classification according to claim 2, characterized in that: A feeding pipeline is connected between the cyclone dust collector and the ball mill, a feeding pipeline is also connected between the bag dust collector and the cyclone dust collector, and a negative pressure air duct is connected between the negative pressure fan and the bag dust collector.

4. The device for zinc powder ball milling recovery and classification according to claim 3, characterized in that: The support plate is provided with studs for fixing the support plate and the guide ribs.

5. The device for zinc powder ball milling recovery and classification according to claim 4, characterized in that: The guide rib is designed to be inclined.

6. The device for zinc powder ball milling recovery and classification according to claim 5, characterized in that: The zinc powder screening mechanism also includes a connecting rod, and fixing frames are provided at both ends of the connecting rod, and the fixing frames are adapted to be provided with a fixed support seat.

7. The device for zinc powder ball milling recovery and classification according to claim 6, characterized in that: The ball mill and the zinc powder screening mechanism are coaxially designed.

8. The device for zinc powder ball milling recovery and classification according to claim 7, characterized in that: The driving device is a motor, and a gearbox is arranged between the motor and the ball mill.

9. The device for zinc powder ball milling recovery and classification according to claim 8, characterized in that: The bottom end of the cyclone dust collector is provided with a cyclone dust collector discharge port, and the bottom end of the bag dust collector is provided with a bag dust collector discharge port.

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