How to choose the right screen
Writer： admin Time：2020-04-28 15:22 Browse：℃
As a fine screening equipment, the vibrating screen has a wide range of applications, and the screen is the main component of the entire screening system. The correct selection of the screen is very important. In the production process, it is directly in contact with the materials. Once the material is not properly selected, it is easy to be damaged too quickly. At present, the materials of the screen are mainly divided into metal and non-metal. The metal materials include low carbon, high carbon, high manganese steel, stainless steel, etc., and the non-metal materials are mostly rubber, nylon, polyurethane and so on. In order to facilitate everyone to choose correctly, the following polyurethane screen manufacturers introduce the performance characteristics of commonly used screens.
Manganese steel screen
Meaning: Manganese steel screen is a metal mesh structure used for screening and filtering. It can be made into various shapes of rigid screening and filtering devices.
Usage:
Is widely used in sieving, filtering, dewatering, desilting and other operations in many industries.
Features:
High strength, stiffness and bearing capacity.
Anti-blocking screen
Category:
Rectangular hole screen, diamond-shaped anti-blocking screen, wave-shaped anti-blocking screen
Usage:
Rectangular hole screen: Generally speaking, if the stone particles are relatively regular and dry, and there are not too many flakes, you can choose a rectangular hole screen;
Diamond anti-blocking screen: If the gradation requirements of stone are high and there are many sheet materials, diamond-shaped anti-blocking screen should be preferentially selected, such as stone screening in highway asphalt pavement;
Wavy anti-blocking screen: For intermediate transitional screening, such as adding another screen between the coarse screen and the fine screen, it is recommended to use the wave-shaped anti-blocking screen, which has the advantage of higher screening efficiency The screening of materials with more dust is like the screening of tailings.
Features:
Expand the planar two-dimensional fixed holes to three-dimensional and three-dimensional variable diamond screen holes, and use the secondary vibration generated by the adjacent screen bars in random vibration to establish an effective vibration difference. Constantly changing, there is relatively no fixed critical granular stone. The specific method is to set a moving screen bar with a relatively large vibration amplitude between two relatively stationary static screen bars. The moving screen bar can block the jamming period. The stone bounces or sifts it. According to the characteristics of the stone, the relative elastic strength and vibration amplitude of the static and dynamic screen strips are adjusted accordingly, so that the screen is in the best screening state, and the screening efficiency can be increased by about 30% compared with the fixed mesh screen. The self-cleaning function of the screen mesh is realized, which greatly reduces the clogging of the screen holes.
Polyurethane screen
Polyurethane is called polyurethane, which is the general name of macromolecular compounds containing repeating urethane groups (NHCOO) in the main chain. It is made by addition polymerization of organic diisocyanate or polyisocyanate with dihydroxy or polyhydroxy compound.
Usage of polyurethane screen:
Polyurethane screens are mine equipment, used in mines and quarries in conjunction with vibrating screens and other mine equipment.
Features of polyurethane screen:
Polyurethane screen has beautiful appearance, bright color, light weight, high mechanical strength, heat insulation, sound insulation, corrosion resistance, excellent weather resistance, no secondary decoration, and various colors.
1. Good abrasion resistance and long service life. Its abrasion resistance is 3 to 5 times that of steel sieve and more than 5 times that of ordinary rubber sieve.
2. The maintenance workload is small, the polyurethane screen is not easy to damage, and the service life is long, so it can greatly reduce the maintenance volume and the loss of production and maintenance.
3. The total cost is low. Although the polyurethane screen of the same specification (area) has a higher investment (about 2 times) than the stainless steel screen plate, the life of the polyurethane screen is 3 to 5 times that of the stainless steel screen plate, and it is repaired and replaced The number of times is low, so the total cost is not high, and it is economically very cost-effective.
4. Good moisture resistance, can work under the condition of water as the medium, and in the case of water, oil and other media, the coefficient of friction between the polyurethane and the material is reduced, which is more conducive to sieving, improves the screening efficiency, and avoids wet particles At the same time, the friction coefficient is reduced, the wear is reduced, and the service life is increased.
5. Corrosion resistance, non-flammable, non-toxic and tasteless.
6. Due to the reasonable design of the sieve holes and the unique manufacturing process of the sieve plate, the particles of the limit size will not block the sieve holes.
7. Good vibration absorption performance, strong noise reduction ability, can reduce noise, and make the sieve on the screen is not easy to break during the vibration process.
8. Due to the characteristics of the secondary vibration of polyurethane, the polyurethane screen has a self-cleaning effect, so the screening efficiency is high.
9. Energy saving and consumption reduction, the specific gravity of polyurethane is small, and it is much lighter than the steel screen of the same size, thereby reducing the load of the screen machine, saving power consumption, and extending the life of the screen machine.
Chai Shang Trading Company's summary: The selection point screen is an inevitable product of the refinement of coal mines, iron ore, industry, and chemical raw materials. It is a composition of tiny cells that society is advancing, indirectly or directly affecting the development of society. The selectivity of the screen is mainly selected according to the characteristics of the screen. The selectivity of the screen is mainly based on the characteristics of the screen, material, wire diameter, mesh opening, length of life, price level, etc. These elements of the screen are mutually influential. The thickness of the wire diameter directly affects the service life and price of the screen. The wear resistance, corrosion resistance, high temperature resistance, and the presence or absence of magnetism of the material directly affect the price of the screen.
