Wear-resistant and corrosion-resistant material – spray-applied polyurethane for vibrating screens

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Vibratory screens have a very wide range of applications, covering almost every aspect of daily life; various types of vibratory screens are needed in processing and manufacturing! ; B’ v/ _# P4 L3 k% t’ v Vibration screens are primarily used in industries such as mining, coal processing, metallurgy, building materials, refractory materials, light industry, chemicals, pharmaceuticals, and food processing. : The M/z/R4 B8 T5 N1 type vibrating screen is the most widely used in mineral processing plants. Depending on their drive mechanisms, they can be classified into the following types: eccentric vibrating screens, inertial vibrating screens, self-centering vibrating screens, and resonance screens. Polyurethane elastomers are an upgraded version of polyurethanes, representing an important innovative technology in the field of modern coating applications. Sprayed polyurethane elastomers possess excellent properties, similar to those of rubber: they are wear-resistant, highly elastic, and strong, and their areas of application overlap almost entirely with those of rubber. Compared to rubber, it has several advantages, such as good plasticity, which allows it to be used to create various objects as needed ； It has a wide range of hardness levels, allowing it to meet different hardness requirements. Specifically for vibrating screens used in mines, the advantages of elastomeric polyurethane in this field are even more evident. It has a high elongation rate and a wide range of hardness levels; its wear resistance, biocompatibility, and blood compatibility are particularly outstanding. At the same time, it also possesses excellent properties such as oil resistance, impact resistance, low-temperature resistance, radiation resistance, load-bearing capacity, heat insulation, and electrical insulation. Sprayed polyurethane possesses excellent properties such as wear resistance, water and oil resistance, vibration absorption and noise reduction, high strength, and strong adhesion to metal frames. It produces low levels of noise, has good self-cleaning capabilities, reduces the load on screening machines, saves energy consumption, extends the lifespan of these machines, and ensures high-quality screening results. This polyurethane elastomer material is almost the ideal non-metallic material to meet the requirements of mines, and it can even replace some metal materials. Polyurethane elastomer materials address specifically some of the issues encountered during the processing of polyurethane elastomers, while maintaining all the excellent physical and chemical properties of the original material. The Shore hardness of this wear-resistant coating varies widely. It ranges from Shore A45 to Shore D60. The hardness can be adjusted according to different operating conditions; by increasing the content of polar groups, hydrogen bonds are utilized to enhance the intermolecular forces, thereby effectively extending the effective lifespan of the coating. Furthermore, this material can not only effectively resist erosion and cavitation wear, but also withstand corrosion from strong acids and strong bases within a pH range of 3-11. This material not only protects against water erosion and cavitation wear on the surface of components, but it also shields them from corrosion by acidic and alkaline substances; it is truly a versatile surface treatment material. This material has strong versatility and is widely used in various industrial fields that require corrosion- and wear-resistant protection, achieving excellent results. It has been proven that this material bonds very firmly to the substrate, and the lifespan of the coating is generally more than ten times longer than that of ordinary metal materials, resulting in significant economic benefits.