How to increase the output of vibrating screen?

Mining vibrating screen is a kind of large-scale screening equipment, commonly used in the mining industry, etc. The use of this vibrating screen to screen materials generally requires relatively large output. In use, we also hope that the larger the output of the equipment, the better. Since the models and specifications produced by each vibrating screen manufacturer are different, the output of each equipment is also different, but this can be improved by some methods, so how to increase the output of the vibrating screen?

The method of increasing the output of vibrating screen

High frequency dehydration vibrating screen

1. Improve the opening rate of the screen mesh

Because the ore is relatively large in mesh, a metal woven mesh or punching plate with a large aperture is generally used. If you want to increase the output, you can also replace the screen mesh with a larger aperture than the previous one for production. The high opening ratio is beneficial to improve the screening effect; but the disadvantage is that it is not as high as the previous screening. Therefore, once the output needs to be increased, it will inevitably affect the screening accuracy.

2. Adjust the feeding method

A distribution device can be installed at the feed port of the linear vibrating screen, so that the material can be evenly fed to the screen surface to achieve the requirement of increasing the output, which is of great help to improve the screening output of the linear screen. If the distributor is added unconditionally, attention should be paid to manual feeding to ensure uniform feeding. When feeding, the cloth should be evenly distributed.

3. Increase the screening area

The screening area of ​​the linear vibrating screen can be achieved by increasing the length and width of the screen surface. The width of the screen surface determines the processing capacity of the sieve. The wider the screen surface, the greater the output; the length of the screen surface determines the screening efficiency. The longer the screen surface, the longer the material screening time, and the higher the efficiency. After the size is reduced, the sieving efficiency improves little or not at all. At this time, increasing the length of the sieve surface will only increase the volume and weight of the sieve.

4. Adjust the inclination of the screen surface

Adjusting the angle of the screen surface is also an important method to increase production. The larger the inclination angle of the screen surface, the faster the material layer moves forward on the screen surface, and the larger the output, but the time for the material to stay on the screen surface is shortened, which reduces the chance of particles passing through the screen and reduces the screening efficiency. The inclination angle is 45°. If the screened material is not high in accuracy and only needs to be screened roughly, the height of the vibration spring under the lower base and the screen body can be adjusted appropriately. This angle is generally controlled at ≥10°, so that the height of the feeding port can be adjusted. The rise can speed up the movement of the material on the screen surface to increase the output. It should be noted that if you continue to increase the height, the screening effect will not be achieved.

5. Increase the excitation force of the motor

The strength of the motor’s exciting force directly affects the screening effect. The greater the exciting force, the greater the screening output. It should be noted that the linear vibrating screen is a double motor. The use time should pay attention to the adjustment of the motor’s exciting force on both sides. equal.

6. Install the net cleaning device

The bouncing ball is installed between the screen and the punching plate to continuously bounce up and down to hit the screen, so that the ore stuck and stuck between the screen holes is bounced and dropped by the impact to achieve the effect of effective net cleaning. Through the cleaning method, the material can quickly pass through the screen, so as to achieve the purpose of screening, effectively improve the screening rate of the material screened by the mining vibrating screen, and increase the output of the mining vibrating screen.

7. Adjust the inclination angle of the screen machine

The design inclination angle of the mining vibrating screen is usually 45°, but in the actual use process, if there are few impurities in the material, only a coarse screen is required, and the user can appropriately adjust the height of the vibration spring at the lower part of the feeding port to make the feeding The increase of the mouth height can speed up the movement of the material on the screen surface and increase the output.

8. Screen surface management

The vibrating screen will cause certain damage or even corrosion to the linear screen due to the residual materials on the screen surface and the screen body, which will reduce the life of the machine and reduce the output. Therefore, when the machine operation is completed, the materials on the screen surface should be completely screened. Clean and then turn off the power, stop working.

9. Regular maintenance of vibrating screen

The materials screened by the mining vibrating screen are very rough, so the material itself will be difficult to handle, so the material may block the screen or remain in the screen box during shutdown, and the long-term residue will also reduce the durability of the vibrating screen. Therefore, in a certain sense, regular maintenance of the vibrating screen can also increase the output.

Reasons for the low output of vibrating screen

Linear vibrating screen

1. Uneven force on the screen surface

1) Uneven feeding. In the process of ore mining vibrating screening, if the feeding is uneven, the ore distribution on the screen surface will be uneven; if the feeding is too much, the screen material will be too thick, one screen will be seriously overloaded, and the other screen will be almost No-load operation and load production, resulting in blockage of the screen will lead to a decrease in production, and will often cause uneven wear and tear of the screen and rapid damage.

(2) The force on the screen surface is too large. The distance between the funnel and the feeding end of the circular vibrating screen is too high, reaching 400 mm. When the ore enters the circular vibrating screen from the funnel, the impact force on the feeding place is too large, resulting in the fracture of the girder at the feeding place and the cracking of the box; the ore enters the circular vibrating screen. After the vibrating screen enters the material end, the distribution is uneven, the ore always runs to one side, and only half of the screen meshes play the role of screening, resulting in serious ore accumulation on one side and low screening efficiency.

2. The material stays for too long

The ore and other logistics move slowly on the screen, and the screen surface accumulates too much ore, reaching a thickness of 200mm. Through multiple measurements of the moving speed of the material on the screen surface, the speed is about 0.2m/s. The moving speed of the ore is too slow, resulting in too much ore on the screen surface, so that the vibrating screen always runs in an overloaded state. It affects the screening accuracy and yield.

Factors affecting the output of vibrating screen

Arc vibrating screen

1. Particle and sieve shape

The meshes of the material particles and the supporting screen of the vibrating screen should be compatible with each other. For example, the spherical particles mostly use circular screen holes, while in the feed industry, for the cylindrical or irregular particles, there are both circular and rectangular. The sieve hole, the state of the material particles when they contact the sieve hole has a great influence on whether the particles can pass through. Whether the material can pass through the screen smoothly has some chance. It can be concluded by statistical means that the material with cylindrical particles in actual production generally uses rectangular meshes, while for irregular particles, circular meshes are mostly used.

2. The opening rate of the screen mesh

The opening rate of the screen will affect the output of the vibrating screen. The opening rate of stainless steel woven mesh is large and the strength of the mesh can be used normally. It is also widely used in practical applications.

3. Materials placed on the screen surface

If the material is thickly stacked on the screen surface, the material on the upper layer will be discharged from the upper discharge port before it can pass through the screen, which will lead to the loss of net raw materials, and mixing will occur in the screening and grading operations. material phenomenon, affecting the quality of the finished product. Of course, the material layer cannot be too thin, otherwise the output will be relatively small. According to the test, the appropriate material layer thickness is obtained, and an average value is obtained between the inclination angle of the screen surface and the amplitude of the screen body.

The above is the answer to how to improve the output of the vibrating screen. You can improve the output of the vibrating screen in a targeted manner according to the method analyzed by the editor above and combined with your own situation. More importantly, after the vibrating screen is used, it is necessary to maintain and maintain the vibrating screen, which is of great benefit to the stable production of the vibrating screen.

How to deal with abnormal operation of vibrating screen exciter?

The vibrating screen exciter is an important component that utilizes mechanical vibration. The exciter can make the excited object obtain the vibration amount of the form and size, so as to conduct vibration and strength tests on the object, or calibrate the vibrating screen and sensor.

The vibrating screen exciter can also be used as an excitation component to form a vibrating machine to realize the conveying, screening, compacting, forming and tamping of soil sand and gravel of materials or objects.

DE60A

1. Damage to the vibration damping system

For example, the failure of the vibration damping spring or the accumulation of materials under the screen will make the vibration damping system uncoordinated, resulting in damage to the vibrating screen exciter.

2. Installation quality problems

Improper adjustment of the exciter gap during the installation process will cause errors in the axial radial joints between the exciter and the motor, and the universal coupling, as well as the relative position of the exciter eccentric block. Excessive vibration of the vibrator produces high temperature, which seriously affects the normal operation of the vibrating screen.

BE1800

3. Improper use

Due to the sudden shutdown of production or other equipment failures, the screen box is filled with mineral materials, and if the exciter is restarted under heavy load, it is very easy to cause damage to the universal joint of the exciter and other parts.

4. Lubrication failure

The vibration exciter is manually lubricated, and oil is applied every 8 hours. The lubricant is molybdenum disulfide grease. The vibrating screen is in a high temperature and dusty environment. The manual lubrication pump is far away from the lubrication point, especially in winter. , The room temperature is lower, which is more likely to cause the grease to solidify and agglomerate, and the oil cut will cause the bearing to wear and fail.

The exciter is the key component in the vibrating screen. In the process of use, once the above abnormal situation occurs in the exciter, it is very important to find out improvement measures through the analysis of the cause of the failure, and to improve the service life of the exciter.

What should I do if the vibrating screen is difficult to start? Cause and Solution

The vibrating screen is a screening equipment often used in the sand and gravel industry. It uses the exciting force generated by the exciter to screen the material, which is convenient for the next production of the material. However, the vibrating screen does not run continuously for 24 hours. When the production is not in use, the vibrating screen equipment must be shut down. Sometimes when it is restarted, it may be difficult to start. Then when the vibrating screen starts What about difficulties?

Reasons for the difficulty in starting the vibrating screen

Arc vibrating screen

1. The exciter is faulty

The common reason for the difficulty in starting the vibrating screen is the failure of the vibrating screen. When the vibration exciter parts are working, it is necessary to ensure a good lubrication state, not only high-efficiency lubricating grease, but also preventing the lubricating grease from thickening, solidifying, and agglomerating, so as to play its due lubricating function.

Solution: Check the lubrication of the exciter and replace the appropriate lubricating oil.

2. Power failure

Check if the power supply is faulty, and then check the current of the motor. If the motor is faulty, you need to replace the new motor components; the assembly line of the vibrating screen is composed of centralized control circuits. When some components are damaged, it must be timely. Replace with new components; sometimes the voltage is unstable, and the voltage at startup is lower than the rated voltage, which is prone to failure.

Solution: replace the new motor parts; ensure the voltage stability during the working process of the vibrating screen.

3. The vibrating screen itself is faulty

Once again, the linear vibrating screen equipment itself has malfunctioned. Due to the large change in the supply flow of the material, the feeding amount of the linear vibrating screen exceeds the specified feeding value, causing the material to form a blockage on the screen surface. When the material accumulates to a certain amount. , The working load of the linear vibrating screen is large, which makes it impossible to start normally.

Solution: Clean up the materials on the screen surface to ensure that the screen surface can screen the materials smoothly.

Precautions before starting the vibrating screen

Linear vibrating screen

1. Before starting the vibrating screen, check whether the screws and locking parts are firm and whether there is looseness.

2. Check whether the screen of the vibrating screen is pressed tightly, and whether the connection between the motor, rubber pad, screen body and frame is in good condition.

3. Check whether the power supply voltage of the vibrating screen is stable.

4. Check the vibration motor of the vibrating screen, remove the end cover of the motor, check whether the fan-shaped block and the relative angle of the motor are consistent, and check whether the installation angles of the two motors are consistent.

5. Check the feeding device of the vibrating screen; check the tightening gate of the vibrating screen; check the connection between the motor and the screen body.

6. Check whether the inlet and outlet hoses of the vibrating screen are sealed and connected, and do not overtighten them, otherwise they will be twisted when the screen body moves.

7. Carry out no-load test run on the vibrating screen. During the test run, the reciprocating linear motion is performed, the screen body and the frame have no collision phenomenon, and there are no abnormal phenomena such as abnormal noise and abnormal trajectory movement during the operation. After 10-15 minutes, use a wrench to tighten the bolts used for the drive mechanism.

8. The installation angles of the two motors should be consistent.

In summary, if you want to know what to do if the vibrating screen is difficult to start, first find out the reason for the difficulty in starting, mainly because there are some faults in the exciter, power supply or the vibrating screen itself. For example, the exciter may be due to improper lubrication, so It is necessary to check the lubrication and replace the appropriate lubricant. In addition, the operator should always pay attention when operating to ensure the normal production of the vibrating screen.