Rotary vibrating screen and direct discharge screen are two common equipment for screening powder materials. They both look like circular screens, which can be easily confused by unfamiliar people. However, there are significant differences between the two. Therefore, customers often ask which one is better, rotary vibrating screen or direct discharge screen. Let's compare them from the following five aspects.

1、 Appearance structure

The rotary sieve and the self discharge sieve look very similar in appearance, both are circular sieves. Structurally, it is composed of a vibration motor, a base, a screen frame, and a mesh screen.

The difference is that the motor used for the rotary vibrating screen is a vertical vibrating motor, which can achieve1-5layer6Grade screening usually involves equipment with three or fewer layers. The vertical sieve adopts a horizontal vibration motor, usually installed with one to two units, which can be used in a single layer or multiple layers.

2、 Working principle

The vibration force of the rotary vibrating screen is generated by a vertical vibration motor. Under the action of eccentric weights at the upper and lower ends, the motor can rotate in horizontal, vertical, and inclined directions, causing the entire screen to also rotate and vibrate. After the material falls onto the screen, it will move outward and be discharged from the side, completing the screening process.F

The vibration force of the direct discharge screen is generated by a horizontal vibration motor. After the material falls onto the screen, it moves along an elliptical trajectory on the screen under the influence of the excitation force. The screened material is directly discharged from the bottom, and the separated impurities are discharged from the slag discharge outlet, completing the screening.

3、 Screening materials

Rotary vibrating screen can screen materials in the form of particles, powders, and slurries, suitable for use in industries such as chemical, abrasive, ceramic, metallurgical, etc. For powdered materials, the screening accuracy can reach400For liquid or slurry materials, the screening accuracy is0-800Between the eyes.

Direct screening can be used for coarse and fine screening of granular and powdery materials in industries such as metal and chemical, and can be used for screening80Objective: Particle and powder materials.

4、 Work output

The screening accuracy of the rotary vibrating screen is relatively high, usually placed on the ground or horizontal platform, feeding from the center of the upper end and discharging from the side, resulting in a small production volume.

Direct screening is more suitable for large-scale production. In the production site, it is usually placed on the second floor or a high platform for direct screening. The material is fed into the upper center and discharged from the bottom of the equipment. The output is achieved by rotary vibrating screen2-5Twice.

5、 Clearing Network Method

The rotary vibrating screen is equipped with a specialized cleaning device——Bounce ball, use the secondary vibration generated by the bounce ball during the screening process to clean the mesh surface and avoid blockage. Direct screening generally screens particles and powder materials, which are not easily clogged, so special cleaning devices are generally not required.

In summary, both rotary vibrating screens and straight row screens have their own advantages, and it is necessary to determine which one is more effective based on one's own production conditions. If you want a large output, you will definitely choose a direct screening, but if you have high requirements for material fineness, you can only choose a rotary vibrating screen with low output but high screening accuracy.