Polyurethane screen and metal screen
Writer： admin Time：2020-09-17 11:42 Browse：℃
The screen is an inevitable product of the refinement of coal, iron ore, various metal mines, industry, and chemical raw materials, and is an indispensable part of the classification and screening process. Which is more practical, polyurethane screen or metal screen? Let's follow the polyurethane screen manufacturers to understand.
1. Metal mesh features
1, weaving precision;
2, mesh rules;
3, the filtering accuracy is reliable;
4, high compressive strength;
5, high temperature resistance, chemical corrosion resistance;
6, good abrasion resistance;
7. Good formability.
Disadvantages of metal mesh: 1. Heavy weight; 2. High noise; 3. Easy to block holes and low screening rate; 4. Short service life and high replacement frequency.
2. Characteristics of Polyurethane Screen
Polyurethane screen makes full use of the excellent wear resistance of polyurethane elastomer, high strength, high elongation and high elasticity in a wide range of hardness, good shock absorption performance, oil resistance, low temperature resistance, heat aging resistance, radiation resistance, and electrical resistance. Insulation and other properties
Polyurethane screen is compared with metal screen:
1. During this period, the service life is long and the load capacity is great. Because the polyurethane commercial screen uses steel wire rope as the skeleton material, and the polyurethane itself has a very high elastic modulus, high-strength impact absorption ability, high wear resistance, it has high tensile strength, and its load-bearing ability can be a rubber screen More than 2.5 times. Its service life is 8-10 times longer than that of ordinary metal screen products, 3 times that of stainless steel screens, and 3.9 times that of natural rubber. It is currently the world's most wear-resistant screen material. The material produced by the polyurethane screen is a polymer organic elastomer, which has excellent abrasion resistance, flexibility resistance and great load-bearing ability. The raw materials of the polyurethane screen have been specially treated to ensure that they will never delaminate under the action of long-term alternating loads.
2. Higher screening efficiency. The screen surface has the function of self-cleaning, no hole blocking, and high screening efficiency. Due to the strong water permeability of polyurethane and the large cone angle of the screen hole (140°), it can effectively prevent the adhesion of wet fine particles, so it is suitable for the screening and classification of wet fine materials. Polyurethane screen products are made of imported raw materials. Its elastic body and its own good relaxation function can effectively avoid the phenomenon of blocking holes under dynamic conditions.
3. High screening accuracy. The production process of the polyurethane screen adopts the mold casting process, the aperture is accurate, the screening quality is high, and the particle size of the material under the screen can perfectly meet the user's request.
4. It has a wide range of applications, which can be applied to any type of vibrating screen and can be manufactured by measuring machines. Polyurethane screens are professionally used in hydropower stations, building materials and other metal processing and mining. For the screening of various materials within the range of 0.1mm-170mm, both dry and wet screening will not affect the screening efficiency. For the dehydration and de-intermediation sieve in the range of 0.5m-3mm, the superiority of the polyurethane screen surface is more fully demonstrated. The product is resistant to water, corrosion, aging, and easy to replace and maintain. Polyurethane has a low density (1.32kg/m 3) and is lighter than a metal screen surface, which can reduce production unit consumption, so it can easily adapt to the large-scale development request of the screen machine.
5. The device is simple and convenient for replacement and maintenance. The product is suitable for any type of screening machine, and is light in weight. It is a field installation or replacement maintenance, which reduces the workload and greatly improves the work efficiency.
The excellent performance of polyurethane screen makes it extremely widely used in the mining industry. Metallurgy (iron ore, limestone, fluorite, cooling blast furnace slag, coke and other raw materials), non-ferrous, yellow, coal, chemical, building materials and hydropower engineering, abrasive waste treatment, quarry and other industries materials washing, screening, Classification and other industries. The new structure pattern sieve plate with various format specifications and sieve hole sizes is especially commonly used in occasions with strong impact, high hardness and high wear resistance. Fine crushing and screening of iron ore, classification of raw coal, screening of gold, building materials, and sand and gravel for hydropower and nuclear power projects. More and more mining industries are gradually replacing old metal screens and rubber screens with polyurethane screens.
It can be seen that the comprehensive performance of the polyurethane screen is stronger than that of the metal screen. For high-quality polyurethane screens, please look for Chaishang Trading Company.
