How to deal with the dust from the vibrating screen? Causes and treatment measures

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Mine vibrating screens are generally large-scale screening equipment with a certain weight. And during operation, due to the mutual collision and friction of materials, such as ore, a large amount of dust is easily generated, and then there is a problem of flying dust.

Generally, the dust from the vibrating screen is distributed densely, not only on the screen surface, but also a certain amount of dust will be scattered at the screen surface gap and the feed inlet, which is very unfriendly to the working environment of the operator and has certain hazards. , Then how to deal with the dust from the vibrating screen?

Causes of dust from vibrating screen

Arc vibrating screen

1. A large amount of material accumulation

Because a large amount of materials are accumulated in the feed inlet of the vibrating screen, more dust is generated. Especially for the vibrating screen with a large output, such as the mining vibrating screen of about 1,000 tons, the dust problem is very much.

2. The interface is not well sealed

(1) The interface is the discharge port of the vibrating screen and the sealed interface of the receiving equipment. This place is not well sealed and connected, which will cause the vibrating screen to fly in dust. If necessary, a sealed soft connection should be made at the discharge port, and computer intelligent control is adopted to realize automatic discharge without manual, which can greatly reduce dust escape during the discharge process.

(2) The sealing cover (dust cover) of the vibrating screen and the box body are usually fixed by bolts, and it is inevitable that there will be fine gaps between the sealing dust cover and the box body.

3. The vibrating screen vibrates strongly

During the operation of the vibrating screen, due to strong vibration, a large amount of dust will also be generated. On the one hand, the outside of the equipment must be sealed, and on the other hand, the dust removal equipment on the equipment is also very necessary.

Measures to deal with dust from vibrating screen

Linear vibrating screen

1. It is possible to add a closed silo and the feed inlet to the top of the equipment for a sealed connection to reduce the probability of external exposure of the raw materials. The belt conveyor belt inside the silo can also speed up the material transmission.

2. The tilt angle of the vibrating screen, the vibrator is placed at an angle of 45°. In this way, the material can be pushed forward, and horizontal ribs can be added to the pipe if necessary, so that even an upward slope will not hinder the feeding of the material and will not generate more dust.

3. The gap between the dust cover and the box body should be minimized as much as possible, so in the daily work process, it should be tightened continuously to avoid the escape of dust due to loose parts.

4. In daily production, remember to check the fasteners of the vibrating screen regularly to avoid additional vibration due to the loosening of individual components. Do regular maintenance and repair of the vibrating screen equipment daily to ensure the operating status of the screening equipment The key to health.

Misunderstandings in handling the dust of vibrating screen

High frequency dehydration vibrating screen

To deal with the dust problem of the vibrating screen, some users will choose to add negative pressure to solve this problem. This is actually a misunderstanding, because the dust problem of the screening operation is generated by the vibrating screen itself, and the dust generated by the vibration of the vibrating equipment itself is actually very limited. Yes, only adding negative pressure to the vibrating screening equipment cannot solve the dust problem in the screening workshop. It needs to be analyzed and controlled from the aspects of feeding, receiving, and transportation.

The source of the dust problem of vibrating screen

From the above analysis of the cause of the dust problem, the main source of the problem comes from the following two aspects:

1. Feeding dust: it has a direct impact on the feeding tools on site, the dust generated by manual feeding, the dust generated by the equipment feeding equipment connection without a sealed soft link, and the dust generated directly.

2. Material splicing and dust: The same is caused by manual splicing without protection, and the splicing equipment is not well sealed and connected.

The above is the answer to how to deal with the dust from the vibrating screen. Only by doing a variety of treatment and protective measures can the dust hazards of the vibrating screen be reduced.

What are the reasons for the mixing of the linear vibrating screen? Causes and solutions

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The linear vibrating screen can achieve multi-layer screening. Its function is to screen and classify the materials that need to be screened. However, if there is a mixing problem, if the problem is found early, it can be dealt with in time. If the problem is found late , Then the role of vibrating screen screening will be meaningless, and a lot of useless work has been done, so knowing the reasons for the mixing of linear vibrating screens is the key to solving the problem.

Reasons for mixing of linear vibrating screen

Linear vibrating screen

1. Reasons for the sealing strip

(1) Deformation of the sealing strip

Deformation or rupture of the sealing strip can easily cause mixing of the linear vibrating screen. The screen frame and the screen body of the vibrating screen are equipped with sealing strips for sealing. The commonly used sealing strips are natural rubber and silica gel. After the vibrating screen is used for a period of time, the sealing strips will be deformed or broken, which is prone to mixing.

(2) The sealing strip is not tightly sealed

There are three possibilities for the sealing of the sealing strip: the sealing strip is not matched with the linear vibrating screen; the quality of the sealing strip is not good; it is not carefully installed during installation, which causes the sealing strip to appear during use and the sealing is not good.

2. Material accumulation on the screen surface

The screen surface has long-term accumulation of materials and even mesh blockage. The screen surface of a linear vibrating screen is generally composed of a woven wire mesh with a fixed aperture that undertakes the screening work. If there is a long-term accumulation of materials on the screen surface or the phenomenon of screen blockage, the weight of the accumulated material plus the vibration screening The downward force combined with the exciting force of the machine will press the material particles that do not meet the sieving specification to squeeze the sieve holes, deform the sieve holes and loosen the sieve, and then the phenomenon of material mixing will occur.

3. Broken screen

The screen of the vibrating screen is a vulnerable part, and different screening materials have different abrasion on the screen. The continuous operation of the screen while the load on the screen is quite large, which will cause the screen to be damaged and easy to appear. Mixing condition: The screen is broken due to long-term use, resulting in mixing.

4. The material running track is wrong

The running track of the material on the screen surface is wrong, causing the small particle material and the large particle material to be unable to be completely classified, and the large particle material and the small particle material are mixed together, which results in the phenomenon of mixing.

5. The motor’s excitation force is too small

The magnitude of the motor’s exciting vibration force directly affects the screening of materials. If there is a mixture of materials, it is possible that the exciting force is too small, and the materials are not completely separated. This situation is mostly caused by the longer use time of the vibrating screen motor. Long time or the time to replace the motor.

6. The feed inlet is close to the edge of the screen frame

The linear vibrating screen relies on the screen fixed by the mesh frame in the screen box to screen the material. Users who are familiar with the structure of the linear vibrating screen and the fixing method of the mesh frame can find that the screen mesh frame and the edge of the screen box There are gaps. If the edge of the feed port frame at the rear end of the feed port is close, and the feed volume is too large, it is easy to cause a small amount of powdery particles to jump to the gap between the rear baffle of the vibrating screen and the screen frame, resulting in Mixing of upper and lower materials.

7. The screen frame is not stretched forward

Since linear vibrating screens often need to meet the screening needs of users for large-volume production, the size of the fuselage is often large and medium-sized equipment of 2m or more. The size of the screen frame of the vibrating screen is also increased according to the size of the body. At the same time, in order to ensure the convenience of screen replacement and facilitate the installation and removal of the screen frame, the linear vibrating screen is designed with a free space of 2cm at the front end. Therefore, if the bead on both sides of the screen frame is not stretched forward after the screen is changed, the material is likely to jump along the bead angle in the screen box and enter the discharge without being screened by the vibrating screen. Feeding mouth, produce mixing phenomenon.

The solution to the mixing of linear vibrating screen

High frequency dehydration vibrating screen

1. Check the sealing degree of the vibrating screen frame and the screen body, the screen frame and the screen frame. If the seal is not tight, it is recommended to use a sealing strip to seal or replace the screen frame. When using the vibrating screen, the user should regularly check the use of the sealing strip, and replace it in time if it is damaged.

2. For the problem of changing the angle of the vibrating motor, the angle of the motor can be adjusted according to the screening situation of the material to change the running track of the material on the screen surface and improve the screening accuracy. Generally, the motor angle of the vibrating screen is adjusted to 65 degrees when it leaves the factory.

3. Properly adjust the excitation force of the motor or replace with a new motor.

4. In the production process, check whether the screen is damaged. If it is found to be damaged, it should be replaced in time. To ensure the quality of the screened materials.

5. Choose a good quality screen, check the use and wear of the screen regularly, so as to avoid the damage of the screen as much as possible.

The above introduces the reasons for the mixing of the linear vibrating screen. The main reasons are the deformation of the sealing strip or the lack of sealing, the accumulation of materials on the screen for a long time, the damage of the screen or the long-term use, and the motor’s excitation force is too small. Etc., these are all causes of mixing.

If you want to solve the mixing, you need to start with the reasons, such as checking the sealing degree of the vibrating screen from time to time. Hiside focuses on the production of mining vibrating screens, with high screening efficiency and high strength, and they have been tested and run before leaving the factory to ensure product quality.

How to clean the vibrating screen?

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The use environment of mine vibrating screens is generally harsh, and they are basically used outdoors, unavoidable from wind, sun and rain. In the mining industry, many materials also contain a certain amount of dust. When vibrating screens are used for screening , These dust and other dust will enter the vibrating screen, so it is necessary to clean the vibrating screen to ensure that the vibrating screen can be screened better, so how to clean the vibrating screen? The editor of Heside is here to explain it to you.

Vibrating screen cleaning steps

Arc vibrating screen
1. Equipment cleaning

The operator turns off the power switch from the switchboard. Unload the vibrating screen hopper (upper cover), screening mesh, and fine powder hopper in turn, and clean the inner and outer surfaces of the vibrating screen hopper (upper cover), screening mesh, and fine powder hopper. Transfer the hopper (upper cover), screen mesh, and fine powder hopper of the vibrating screen to the container cleaning room, put it in the cleaning tank, soak in purified water for 10 minutes, rinse the remaining materials with purified water until there is no visible foreign matter on the surface, and dry it , Assemble the equipment after drying. Use a cleaning cloth dipped in purified water to wipe off the dust, stains, and materials on each surface of the body. Visually observe that the surface of the equipment is bright and clean without visible stains.

2. Equipment disinfection

Before using the equipment, unload the hopper (upper cover), screen mesh, and fine powder hopper of the vibrating screen, and wipe the inner surface of the vibrating screen hopper (upper cover), screen mesh, and fine powder hopper with a mercerized towel dipped in 75% ethanol solution . Assemble the sterilized equipment in the order of fine powder hopper, screen mesh, and hopper (upper cover) from bottom to top.

Precautions for vibrating screen cleaning

High frequency dehydration vibrating screen

1. When the vibrating screen is cleaned, the temperature should be between 30°C and 50°C. If the temperature is lower or higher than this temperature, the cleaning effect will not be ideal;

2. Cleaning liquid is needed to clean the vibrating screen. The higher the viscosity of the cleaning liquid and the higher the gas content, the better the cleaning effect;

3. When cleaning the vibrating screen, pay attention to the location of the object to be cleaned and the depth of the cleaning liquid. When the location of the cleaning object is relatively hidden, the depth of the cleaning liquid should be adjusted appropriately to ensure that it can be cleaned to the target position.

4. Check the upper and lower screen surfaces of the vibrating screen to remove impurities on the screen surface.

5. Check the bottom of the vibrating screen and clean the impurities to ensure that the bottom is unobstructed.

6. Check the fixing nut of the screen frame at the feed end of the vibrating screen to ensure that the screen frame has been compressed.

7. Start the cleaning equipment, pay attention to observe the vibration of the screen body, if there is abnormal jumping, shaking or abnormal noise, stop it immediately, check and eliminate the fault.

8. The impurities on the upper sieve surface should be cleaned at least once every 1 hour, and the lower miscellaneous bags should be replaced in time when they are full.

9. If the equipment is not running for a long time, the upper and lower sieve surfaces should be removed according to the “Maintenance Manual” to completely remove impurities, and check whether the sieve surface is damaged.

10. Frequently clean the sanitation around the machine to ensure the requirements of civilized production.

Linear vibrating screen

The frequency of vibrating screen cleaning

1. After each use of the vibrating screen, perform simple cleaning.

2. Disinfect the vibrating screen after cleaning and before use

3. After the vibrating screen is cleaned, it needs to be disinfected if it is used again within 48 hours. If it has not been used for 48 hours, it should be cleaned and disinfected again before using it again.

4. After the vibrating screen is used, the cleaning work should be completed within 4 hours.

The above is the answer on how to clean the vibrating screen. Generally, the scope of vibrating screen cleaning includes the hopper, screen, inner and outer surfaces of the vibrating screen, and the outer surface of the main body. Remember to turn off the power when cleaning. Effective cleaning is helpful to improve the working environment and screening effect of the vibrating screen.