The trommel screen is one of the most widely used screening equipment. Drum screen according to the different structure, can be divided into a shaft drum screen and no shaft drum screen. Regarding the drum screen, we need to consider the screening accuracy of the drum screen, because the screening accuracy is the quality standard of the drum screen. If the screening accuracy of the trommel screen is too low, how to solve it? Look at the analysis below.
1. Feed uneven materials
Some users increase feed flow to increase capacity. Will increase the thickness of the material layer on the surface of the screen, the material through the sieve will resist the large size material, then the small size material flow directly from the material flow, mixing the large size material.
Solution: In order to reduce the feeding speed on the basis of maximum capacity, users can use feeding equipment to transport the material to the drum, such as belt feeder, spiral feeder, vibration feeder, etc. 2. The length of the trommel screen is not enough
If the length of the drum screen is not enough, after the material enters the cylinder screen, the movement time of the material surface on the screen is too short, so the material flow screen surface does not have enough time to spread and it will cause the screening accuracy to become low.
Solution: before buying a drum net, please consider whether the length of the drum is enough, the smaller the material, the longer the length of the drum net.
3. Screen surface material blockage
Some materials have viscosity, once the reaction with the contents of the air will adhere to the screen, and then the screen hole will be blocked by the material. Therefore, the effect of the screen surface will be reduced, thus reducing the screening accuracy.
Solution: clean the residual material on the screen surface in time, keep the screen surface clean, or increase the cleaning device on the roller screen.
4. The installation Angle of the sieve cylinder is too large
Shaft drum screen installation Angle, according to the material characteristics, we can choose different installation Angle, if the installation Angle is too large, the material will slide down, because of gravity, so the material movement screen surface time is too short, then the screening accuracy will be below.
5. Damage screen
Considering the problem of environmental pollution, some users will require the drum screen manufactured by the supplier to be fully closed. If the screen is damaged, the user can not find it in time, which will reduce the screening accuracy.
Solution: Timely open the seal cover to check whether the screen is damaged, if the screen is damaged, please repair or replace in time.