Banana Screen Selection and Screen Material Choice

In industries such as mining, coal processing, and sand and gravel processing, Banana Screen, as an efficient screening equipment, is widely used in operations such as dehydration, desilting, and classification. Choosing the appropriate screen model and screen mesh material directly affects production efficiency, equipment lifespan, and operating costs. This article will systematically analyze the key factors for selecting Banana Screen and the scientific selection of screen mesh materials.

How to select the model of Banana Screen

Consider the material characteristics

Particle size range

This determines the selection of the screen mesh size. Banana Screen is suitable for high-load screening operations with feed particle size ≤ 300mm and separation particle size ranging from 0.5 to 100mm. If you need to separate coarse impurities, a larger mesh size screen plate should be selected; if you need to obtain fine materials, a smaller mesh size screen plate should be chosen. The mesh size range is usually between 0.3 and 60mm, and the screen surface thickness is 2 to 10mm.

Water content

It affects the selection of screen material. During wet sieving, polyurethane screen plates (1-10mm) have the advantages of preventing clogging and corrosion resistance, and are suitable for fine particles with high moisture content. For materials with high moisture content, polyurethane screens can effectively reduce clogging problems and ensure continuous sieving.

Density of packing and adhesion

Materials with high density require larger processing capacity of the screening machine, while materials with strong adhesion should prioritize the use of screening mesh materials with good anti-blocking performance.

Review processing capacity requirements

Processing capacity per unit time

This needs to be determined in combination with the size of the screen surface. The common specifications for the width of the screen surface are 1.5m – 4.5m, with 2.4m and 3.6m being more common; the length of the screen surface is 6m – 12m, and the longer the length, the higher the screening efficiency. Width determines the processing capacity, and length affects the screening efficiency.

Feed stability and peak fluctuation

If the feeding speed is too fast or there is excessive material accumulation, it will increase the load on the screen plate, causing the screen mesh to deform and break. Therefore, it is necessary to standardize the feeding to avoid damage to the screen mesh.

Parameters of Banana Screen

Vibration Parameters

Amplitude: The greater the vibration intensity, the better the desilting effect.

Frequency: The vibration frequency of different types of screening machines varies. Generally, it needs to be adjusted according to the characteristics of the materials.

Vibration Direction Angle: The reasonable setting of the vibration direction angle can optimize the movement trajectory of the materials on the screen surface, improving the screening efficiency.

Screen surface parameters

Screen surface length and width

The size of the screen surface directly affects the performance and application scope of the equipment. The larger the width, the higher the processing volume per unit time; the longer the length, the longer the material stays on the screen surface, and the higher the screening efficiency.

Inclination angle design

The Banana Screen adopts a unique equal-thickness screening principle. The screen surface is divided into five or six sections according to different inclinations. The inclination angle of the screen plate from back to front is 25°, 20°, 15°, 10°, and 5°. This design can improve the screening efficiency of the screen machine while reducing the wear of the screen plate.

Front section (large inclination): Quickly disperse the materials, allowing coarse particles to quickly sink;

Middle section (medium inclination): Strengthen stratification, increase the material screening rate;

Back section (small inclination): Fine screening, ensure that fine particles fully pass through.

Screen type selection

Metal woven screen

Metal woven screen is suitable for screening dry materials, with a high opening rate and high strength. The lifespan of metal wire screen is generally 2-4 months, while the lifespan of manganese steel wire can reach 4 months. For coarse particles + high-impact materials, it is recommended to use manganese steel perforated plates (6-30mm), which are wear-resistant and impact-resistant.

Polyurethane screen plate

Polyurethane screen plate is one of the most commonly used screen materials in Banana Screen. The lifespan of the polyurethane screen plate can reach 6-8 months, and even up to one year. The polyurethane screen plate is suitable for wet screening and has a good effect in preventing clogging of holes.

Strip gap screen plate

The strip gap screen plate is composed of stainless steel screen bars and polyurethane frames. It has high strength, good flatness, and can be made into various shapes. Xintong polyurethane stainless steel strip gap screen plates have good dehydration effect and strong wear resistance, with common specifications of 610*610mm.

Comparison of Banana Screen Screen Material

Advantages of Polyurethane Screen Plates

High wear resistance

The molecular structure of polyurethane elastomer enables its wear resistance to far exceed that of ordinary metal screen plates. When facing abrasive materials such as coal and ores, the service life can be extended by 2-3 times. The dynamic bending modulus of polyurethane screen mesh can reach 900 MPa, with stable anti-fatigue performance, and its wear resistance is 3-5 times that of ordinary manganese steel screen plates.

Good impact resistance

The material itself has good elasticity, which can buffer the impact force when materials fall, reducing the probability of screen plate damage.

Excellent anti-blocking effect

The surface of polyurethane screen plates is smooth and has certain elasticity, making materials less likely to stick together, effectively preventing screen holes from getting clogged, and ensuring continuous screening. For damp and viscous materials, polyurethane screen mesh has no blocking or adhesion, and the screen plate automatically cleans itself.

Light weight of material

It can reduce the operating load of the screen machine, save energy, and has low noise, improving the working environment. The density of the polyurethane screen surface is small, lighter than the metal screen surface, thus meeting the requirements for the large-scale development of the screen machine.

Factors affecting the service life of screen plates

Material properties: Materials with high hardness and many impurities will accelerate the wear of the screen plate.

Operational standardization: Excessive feed speed and excessive accumulation of materials will increase the load on the screen plate, causing the screen mesh to deform and break.

Daily maintenance: Regularly cleaning the residual materials on the screen plate, checking the fixation of the screen plate, and replacing the damaged parts in time can effectively extend its service life. Polyurethane screen mesh requires standardized installation, such as manufacturer guidance and training, formulation of standardized procedures, and ensuring uniform feeding.

Conclusion

When choosing Banana Screen, various factors such as material properties, processing volume requirements, screen surface parameters and screen mesh materials should be comprehensively considered. Polyurethane screen plates, due to their advantages of wear resistance, impact resistance, anti-clogging, and light weight, have become the preferred solution for wet screening and handling of sticky materials. Metal woven screens and slit screen plates are suitable for specific conditions and each has its own applicable scenarios. In practical applications, proper installation and regular maintenance are the key to extending the service life of the screen plates.