Industrial Background

Linear screen is a mechanical device that uses vibrating motors to generate linear vibrations, causing materials to move forward on the screen surface for sieving, with smaller particles passing through the screen mesh and larger ones remaining, and is widely used in various industries such as mining, construction, chemical and food for material separation and classification.

Working Principle

Linear vibrating screen is driven by multiple vibratiory motors. While the vibration motors doing synchronous rotation or counter rotation, the exciting force generated by eccentric block is canceled out with transverse exciting force, and the longitudinal exciting resultant force is passed on the whole screen surface of linear vibrating screen. In this way, the motion track of vibrating screening machine is a straight line. There is an inclination between the exciting force direction and screen surface, under the action of the resultant force of exciting force and material gravity, the materials on screen surface of liner vibrating screen are thrown up and jumped forward in a straight line. In this way, the materials screening and classifying are achieved.

Detail Procedures of Linear Screen

Material Feeding: The materials to be screened are fed onto the upper part of the linear screen. This can be done through various feeding devices such as belt conveyors or vibrating feeders. The materials are evenly distributed on the screen surface to ensure a smooth screening process.

Vibration Generation: Once the materials are in position, the vibrating motors installed on the linear screen start to work. The vibrating motors generate high - frequency linear vibration forces. These forces are transmitted to the screen frame and the screen mesh, causing them to vibrate in a straight line.

Material Movement and Screening: Driven by the vibration, the materials on the screen surface move forward in a linear direction. As the materials move, particles that are smaller than the mesh size of the screen pass through the screen mesh and fall into the collection area below the screen. Larger particles that cannot pass through the mesh continue to move forward on the screen surface until they reach the end of the screen and are discharged as oversize materials.

Multi-stage Screening (if applicable): In some cases, linear screens may have multiple layers of screen meshes with different mesh sizes. In this way, the materials can be screened in multiple stages. After passing through the first layer of screen mesh, the materials that have passed through will be further screened by the lower layers of screen meshes according to their particle sizes, achieving more detailed separation and classification.

Discharge and Collection: The separated materials are discharged and collected respectively. The undersize materials that have passed through the screen are collected in the corresponding collection bins or conveyors below the screen. The oversize materials that remain on the screen are discharged from the end of the screen and are usually sent to other processing links or disposed of according to specific requirements.

Continuous Operation: The linear screen operates continuously. As long as there is a continuous supply of materials to be screened, the linear screen will keep vibrating and screening, continuously separating materials of different particle sizes to meet the production needs.

Applications

Mining Industry: Widely used for the classification of ores, such as separating iron ores, copper ores, etc., to improve the grade of ores.

Construction Industry: Employed to screen sand, gravel, and other aggregates to ensure the quality of building materials.

Chemical Industry: Used for the separation and grading of chemical raw materials and powders, such as in the production of cement, fertilizers, and pigments.

Food Industry: Used to sieve flour, sugar, grains, and other food ingredients to remove impurities and ensure product quality.

Advantages

High Screening Efficiency: Can handle a large amount of materials in a short time and achieve high - precision separation.

Simple Structure: Composed of relatively few components, which makes it easy to install, operate, and maintain.

Stable Performance: The linear vibration mode ensures the even movement of materials on the screen surface, resulting in stable and reliable screening results.

Wide Applicability: Can be adjusted to suit different materials and particle size requirements by changing the screen mesh and vibration parameters.