vibrating grizzly screen for screening before crushing

The main function of vibrating grizzly screen is to effectively reject small-grained impurities or fines before the material enters the crushing system, so as to reduce the working load of the crusher, prolong the life of the equipment, and improve the overall operating efficiency of the system.

Vibrating grizzly screen combines the screening efficiency of linear vibrating screen and the impact resistance of bar screen surface, suitable for processing large, high mud content, irregular shape or easy to stick material ores and stones.

Features of vibrating grizzly screen:

1. The screen surface adopts single-layer or double-layer high-strength alloy steel bar structure, the screen bar spacing can be flexibly adjusted according to the demand;
2. Wide range of screening particle size, can effectively separate materials with particle size from 60mm to 250mm;
3. The feed size can be up to 1500mm, suitable for oversized ore or raw coal screening processing;
4. The vibration system adopts biaxial exciter design, to ensure that the equipment linear vibration operation is stable;
5. Support the adjustment of amplitude (vibration intensity up to 4.5G) and frequency, to adapt to different material characteristics;
6. The screen body adopts non-welded design, using Huck bolt connection, the structure is strong and anti-fatigue;
7. The bearings are lubricated by thin oil bath and installed with anticorrosion sealing process, which can guarantee the long time operation under high temperature and high dust environment.

The core advantages of vibrating grizzly screen:

1. Multi-functional integrated design: the two processes of feeding and screening are combined into one process, saving equipment space;
2. High wear-resistant screen bar structure: strong impact resistance, suitable for high-intensity impact occasions, such as grading before crushing;
3. Accurate screening capacity: by adjusting the screen bar spacing and amplitude parameters, to achieve accurate screening of different levels of materials;
4. Low maintenance cost: no welding structure to reduce the probability of fatigue cracks, reduce the maintenance cost;
5. Strong intelligent adaptability: according to the type of material (such as wet material, containing mud material) to adjust the working parameters, strong compatibility.

Working principle of vibrating grizzly screen:

Vibrating grizzly screen is mainly composed of screen body, bar screen surface, exciter, base and transmission system. The electric motor drives the biaxial exciter to rotate at high speed through the belt or coupling, and the eccentric block inside the exciter generates periodic centrifugal force, which prompts the screen body to generate reciprocating vibration in the linear direction. The material on the screen surface jumps forward under the joint action of gravity and vibration.

In the process of movement, the finer materials with smaller particles are screened out through the bar gap, while the large materials continue to be transported forward into the downstream crushing equipment. Through the screening process, it can realize the pre-grading of materials and impurity rejection, and greatly improve the operational efficiency of the subsequent crushing and grinding section.

Application areas of vibrating grizzly screen:

1. Mining industry: used for pre-screening of raw ore, removing fine-grained mud, separating lump ore;
2. Coal industry: used to remove gangue, desliming, dewatering or coarse coal screening;
3. Building materials industry: sand and gravel production line for large aggregate screening and removal of debris;
4. Metallurgical industry: raw material screening before furnace to improve melting efficiency;
5. Cement plant and chemical industry: suitable for all kinds of hard or easy to clog the raw material pretreatment.