Advantages and disadvantages of polyurethane screen
Writer： admin Time：2020-04-16 14:13 Browse：℃
What are the advantages and disadvantages of polyurethane screen? Let's understand the following with the polyurethane screen manufacturer:
Polyurethane is a polymer material that has been widely used to make sieve plates in recent years. It has many advantages. First, it has the ability to clean itself. Due to the good flexibility of the polyurethane, the sieve plate made of this material will generate secondary vibration during the sieving operation, which makes the fine-grained materials difficult to block the holes, realizes the self-cleaning function of the sieve plate, and greatly improves the sieve The process effect of the machine is particularly obvious for the screening of fine particles; the second is good wear resistance, long service life, and the wear resistance is 3 to 5 times that of steel sieve; the third is light weight, due to the polyurethane The density is much lower than that of steel, and the change from steel sieve plate to polyurethane sieve plate can greatly reduce the quality of the sieve machine. The reduction of the quality of the parametric vibration increases the amplitude of the sieve machine, thereby further enhancing the working performance of the sieve machine. In addition, polyurethane also has a good buffering effect on dust, which can significantly reduce the amount of dust. Under the same sealing conditions, the use of polyurethane sieve plates can produce about 40% less fly ash than metal sieve plates.
Advantages of polyurethane screen:
1. Good abrasion resistance and long service life. Its abrasion resistance is 3 ~ 5 times that of steel sieve, and more than 5 times that of ordinary rubber sieve.
2. The maintenance workload is small, the polyurethane sieve plate is not easy to damage, and the service life is long, so it can greatly reduce the maintenance amount 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, the life of the polyurethane screen is 3 to 5 times that of the stainless steel screen, 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.
Polyurethane sieve plates are mainly used in coal washing plants, coking plants, mines, power plants, metallurgy, petroleum and other industries.
Disadvantages of polyurethane sieve:
The shortcomings are as follows: first, the strength and hardness are not enough; second, the heat resistance is poor; third, the polyurethane has a low ignition point, and electrical welding is used at the production site. If protective measures are not taken, it is likely to ignite the sieve plate. It is difficult to extinguish when it burns (because the upper and lower sides of the sieve plate and the sieve holes are in contact with the air and cannot isolate the air).
Comb-tooth polyurethane sieve plates and polyurethane bar sieves that have been widely used in the field of cold ore sieving have been well received by the industry and their prospects are good.
1. Polyurethane screen made of different materials has a great influence on the screening efficiency of various materials. The vibration or beating frequency of various materials on the screen plate and screen can increase the screening of materials. Quantity. And the combination of separable materials adds more loose particles that can pass through the grid.
2. Screen size: The larger the screen hole, the higher the productivity of the unit screen area and the higher the shielding efficiency. However, the size of the mesh depends on the purpose and requirements. If you want the screen material to contain less than the mesh. If the fine material is as small as possible, the smaller mesh should be used; on the contrary, if it is required to contain as many particles larger than the specified particle size, the mesh should not be too large. The specified granularity is used as a limitation of the grid width.
3. Polyurethane screen plate excitation force: Polyurethane screen plate is the vibration source of the vibration screening machine. The size of the exciting force is determined according to the size of the vibrating screen and the material handling capacity. The weight and processing volume of the screening machine are different, and the size of the vibration motor used is different. If the excitation force is too large, the vibrating screen will break due to the excessive excitation force. If the excitation force of the vibration motor is too small, the processing effect cannot be achieved, and the accumulation of material may be caused due to the excitation force being too small.
The above is the introduction of the advantages and disadvantages of polyurethane sieve plates by Chai Shang Trading Co., Ltd. For more related questions about polyurethane sieve plates, please refer to other content on this site, or call for details. Inquiries: + 86-18003184666
