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What is a Vibrating Screen?
Vibrating screen is a mechanical device used for separating, classifying, and sorting materials by size through a screening process. It operates by using a vibrating motion to move material across a mesh or perforated surface, which allows smaller particles to pass through while larger particles are retained. This vibration can be generated by various means such as electric motors, unbalanced flywheels, or other mechanical methods. Vibrating screens are widely used in industries such as mining, construction, agriculture, and recycling to handle materials like minerals, ores, gravel, sand, and industrial waste.
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How Does Vibrating Screen Work? Vibrating screen works by utilizing a vibrating motion to separate and classify materials. Here’s a brief description of its working mechanism: 1. Vibration Generation: An electric motor or another mechanical drive generates vibrations. This is typically achieved through an unbalanced flywheel or eccentric shaft, which converts rotational motion into vibrational motion. 2. Screening Surface: The vibrating screen consists of a screening surface, often a mesh or perforated plate, which is mounted on a frame. The material to be screened is fed onto this surface. 3. Material Movement: As the screening surface vibrates, the material on it is shaken and moved across the surface. This vibration causes the particles to bounce and move. 4. Separation: The vibrations cause smaller particles to fall through the openings in the mesh or perforated surface, while larger particles remain on top and move to the end of the screen for discharge. 5. Classification: Depending on the design and configuration of the screen, materials can be sorted into different sizes or grades as they pass through multiple layers or sections of screening surfaces with varying mesh sizes. Overall, the vibrating motion enhances the efficiency and effectiveness of the screening process, allowing for the separation and classification of materials by size.
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Working Principle of Vibrating Screen High-frequency vibrating screens are the most important screening machines primarily utilised in the mineral processing industry.They are used to separate feeds containing solid and crushed ores down to less than 200 μm in size, and are applicable to both perfectly wetted and dried feed. The frequency of the screen is mainly controlled by an electromagnetic vibrator which is mounted above and directly connected to the screening surface. Its high-frequency characteristics differentiate it from a normal vibrating screen. High-frequency vibrating screens usually operate at an inclined angle, traditionally varying between 0° and 25° and can go up to a maximum of 45°. They should operate with a low stroke and have a frequency ranging from 1500 to 9000 RPM. Frequency in High frequency screen can be fixed or variable. Variable High Frequency screen is more versatile to tackle varied material condition like particle size distribution, moisture and have higher efficiency due to incremental increase in frequency. G force plays important role in determining specific screening capacity of screen in terms of TPH per sqm. G force increases exponentially with frequency.
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Applications： Mining: Vibrating screens are extensively used in mining operations for screening and separating minerals such as coal, iron ore, gold, and other metals. Nonferrous Metals Ores : lead, zinc, gold, silver and industrial sand Suitable screening machine for medium size in the indüstry of mine, coal electricity, constructior and chemical. With rubber screening plate, it would be specially good for coke material.
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Clarify needs Please contact us before purchase to confirm the specifications and materials you need, it is more convenient for us to provide you with more suitable and economical applicable equipment. Non-standard customization The machine drawing on this website may not be consistent with the product you need, but our company processes and customizes it for you according to the product drawings, samples, specifications provided by you. Created exclusively for your needs The final machine price may vary depending on your's specific requirements, please consult our sales representatives for detailed machine quotations.
