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# 3 Common Problems and Solutions of Vibrating Screen

xinhai 2020-02-04(05:02:11) 2089 0

In this post we're going to talk about 3 common problems of vibrating screen and how to solve them.

These 3 problems are:

1. Poor screening effect

2. Deformed or even broken screen frame

3. High damage rage of vibrating screen

Let's dive right in!

In production, because vibrating screen working environment is relatively complex, continuous work for a long time and bear heavy load, vibrating screen inevitably damaged or even failure. In order to ensure the normal screening operation of the processing plant, we need to carry out daily maintenance and overhaul of the vibrating screen, and take emergency measures in case of failure. The following is an introduction to some of the vibrating screen in the operation of common problems and solutions.

## 1. Poor Screening Effect

Common vibrating screen mainly includes linear shaker, high frequency vibrating screen and circular vibrating screen. The reason for the poor screening effect varies with different types of equipment. For the circular vibrating screen, the screen surface Angle is not enough is one of the main reasons for the screen effect is not good. For linear and high-frequency shakers, the poor screening effect may be related to the movement direction of the eccentric block. Two groups of eccentricity blocks of the same mass do self-synchronous and reverse motion, generating a single force along the vibration direction at each instant, so that the excitation force and horizontal direction form a fixed included Angle, so that the screen box do reciprocating linear motion. If two sets of eccentric blocks are not in the same phase, then the direction of excitation force cannot overlap with the direction of vibration, and the effect of efficient screening cannot be achieved.

Solution: To solve the problem of screen surface inclination of circular vibrating screen, it is necessary to raise the rear support seat. In practical application, the screen surface inclination Angle can be maintained at 20°, the general circular vibrating screen inclination is often set as 16°~20°. If the inclination Angle is less than 16°, it will cause the material to roll up or the screen material to walk the problem. If the screening effect of linear vibrating screen and high-frequency vibrating screen is not ideal, then the operator should check whether the phase of the two sets of eccentric blocks is horizontal and adjust in time.

## 2. Deformed or even Broken Screen Frame

During the working process, the screen frame of the vibrating screen is constantly shaking, which is easy to cause bending fatigue, which leads to local deformation and even vibration cracking of the screen frame and side plate. If the screen frame breaks, the reasons may be: 1. The screen plate is too thin. 2. Damping spring fails. Spring after long-term use, due to rubber aging or long-term stress but permanent deformation of the spring, the spring failure. 3. Eccentric wheel of the exciter is badly worn and has quality deviation. During the operation, the vibration force is dispersed, which is reflected in the shaker body, so that the amplitude of each part is not consistent, causing the shaker joint part vibration crack or joint joint crack.

Solution: Proper thickening of the screen plate is the most effective way to solve the screen plate is too thin, or for the exciter near the individual side plate to increase the attachment plate, in order to enhance the rigidity of the whole screen body, so that the screen frame is not easy to tremble and fracture. In addition, it is necessary to regularly check the wear of the damping spring and the eccentric wheel of the exciter to prevent spring failure and mass deviation.

## 3. High Damage Rate of Vibrating Screen

The quality of vibrating screen directly determines the screening quality and screening efficiency. The reasons for the high screen breakage rate are mainly divided into the following: 1. When the screen technology is poor, the two layers of screen can not be closely fit, resulting in cuttings can not be discharged. 2. Wrong steering of vibration motor. 3. Clay deposits. The vibration amplitude of soil pile is too small to overcome the clay's cohesive force effectively, which causes the clay to accumulate quickly on the screen and damage the screen.

Solution: 1. The quality of the screen should be strictly checked. 2. The operator can remove the protective cover of the vibrator and check the rotation direction of the eccentric block. Under normal circumstances, eccentric blocks are rotated laterally. 3. Rinse the screen and dirt with spraying water to reduce the stickiness of dirt.

## Conclusion

The technical level and quality of screening equipment are closely related to the technological effect and production efficiency, and even directly affect the economic benefit of mineral processing plant. Therefore, it is necessary to master some common screening equipment problem diagnosis and solution in production practice. But the same problem can also be caused by different reasons, and the solutions may be different. It is recommended that all mine owners seek professional manufacturers to purchase or maintain the vibrating screen, to ensure the normal use of the vibrating screen, the stable operation of the processing plant.

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