Choosing the right dewatering screen size for a sand processing plant requires comprehensive consideration of multiple factors to ensure that the dewatering screen can meet production needs and achieve the desired dewatering effect. Here are some key steps and considerations:
1. Clarify production needs
Production requirements: First determine the daily or hourly production requirements of the sand processing plant, which will directly affect the processing capacity of the dewatering screen.
Material properties: Understand the properties of the material to be dewatered, including particle size, mud content, moisture content, etc. These factors will affect the mesh size and screening efficiency of the dewatering screen.
2. Choose mesh size
The mesh size is one of the key parameters of the dewatering screen, which determines the balance between the dewatering effect and output.
Mesh diameter: Common mesh diameters are 0.15mm, 0.25mm, 0.3mm, 0.5mm, 1mm, etc. The selection of mesh diameter should be determined based on the particle size and mud content of the material. Generally speaking, the smaller the diameter of the sieve hole, the better the dehydration effect, but the output and dehydration speed may be affected; the larger the diameter of the sieve hole, the greater the output, but fine sand may be lost, causing losses.
Screen mesh number: The screen mesh number is also a way to measure the size of the sieve hole. The commonly used mesh number range is between 50-100 mesh. The selection of mesh number also needs to be determined according to the characteristics of the material and production needs.
3. Consider the screen surface area
The screen surface area refers to the total area of the effective screen surface on the screen plate, which directly affects the processing capacity and dehydration effect of the dehydration screen.
Processing capacity: A larger screen surface area can improve the processing capacity of the dehydration screen, but it will also increase equipment investment and maintenance costs. Therefore, when choosing the screen surface area, it is necessary to make a reasonable trade-off based on actual production needs and economic benefits.
4. Pay attention to the material and angle of the screen plate
Screen plate material: The material of the screen plate should have good wear resistance, corrosion resistance, and impact resistance. Commonly used screen plate materials include polymer polyurethane screen plates, etc.
Screen angle: The selection of screen angle will affect the effect of solid-liquid separation and the processing capacity of the equipment. A smaller screen angle can improve the dehydration effect, but the processing capacity is relatively low; while a larger screen angle can improve the processing capacity, but the dehydration effect will be reduced. Therefore, in practical applications, appropriate adjustments need to be made according to material characteristics and production requirements.
5. Other factors
Equipment model and specifications: Select the appropriate dehydration screen model and specifications according to production requirements and site conditions. For example, for large sand processing plants, dehydration screen equipment with stronger processing capacity can be selected.
Operation parameters: including the rotation speed of the screen machine, feed concentration, feed speed, etc. The reasonable selection and adjustment of these parameters have an important impact on the performance and effect of the dehydration screen.
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