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
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
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
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.