How to protect the drum lining

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This post was last edited by PU3618988 on 2021-3-4 at 16:31. During the magnetic separation process, the drum lining of the magnetic separator is constantly subjected to impact from granular iron ore particles with sizes between 0 and 15, resulting in severe wear; it is common in this industry for the drum lining to get damaged. Therefore, the drum cover of the magnetic separator’s magnetic drum needs to be given enhanced protection. Test data show that once the lining of the magnetic drum in the magnetic separator wears out, the slurry enters the magnetic drum and adheres to the surface of the magnetic system, causing the lining to stick to the magnetic system; or the slurry gets into the bearings, leading to damage to those bearings and ultimately destroying the entire equipment. Protection tips: First of all, for the magnetic separator chosen, it is essential to protect the drum lining of the magnetic drum; this can be achieved by covering the drum lining with PVC or applying a wear-resistant layer made of polyurethane elastomer, which **increases the service life of the drum lining. Polyurethane elastomers are a new type of high-strength, wear-resistant, and corrosion-resistant material – spray-type polyurethane elastomers. It can withstand the erosion of acidic, alkaline, oily, and aqueous media with a pH range of 3–11; it boasts excellent corrosion resistance, as well as good resistance to salt spray and freezing ； It also possesses advantages such as high toughness, ease of application, high hardness and strength, good ductility, excellent resistance to bending fatigue and contact fatigue under dynamic loads, low tendency to adhesion, high strength and wear resistance, corrosion resistance, and self-lubrication. Moreover, spray-applied polyurethane elastomers do not age easily, exhibit low friction, and have a wide range of hardness levels (they can maintain high elasticity from Shore A30 to Shore D90). Sprayed polyurethane elastomer is a type of advanced polymer material with well-established manufacturing techniques; it can be widely used in various complex environments such as sewage treatment, mining, ports, power generation, and coal industries to enhance the wear resistance and corrosion protection of mechanical equipment. Sprayed polyurethane possesses excellent properties such as wear resistance, corrosion resistance, impact resistance, salt spray resistance, aging resistance, flexibility, and strong adhesion ； In the submerged state, its wear resistance is 8 times that of cemented carbide steel, 7 times that of vulcanized rubber, and 3 times that of ultra-high molecular weight polyethylene ； It also possesses excellent adhesion properties; different primers and adhesives can be used depending on the substrate, and suitable primers and adhesives can be found for all metal and non-metal substrates ； Construction is also very convenient: it can be carried out at room temperature, and it is not sensitive to humidity or temperature ； It causes no environmental pollution, contains no volatile organic compounds (VOCs), and is a new type of eco-friendly material ； Can cure rapidly at room temperature, without a catalyst ； It has an attractive appearance, good replication of the original design, a continuous and dense coating without seams or pores, and excellent UV protection. Application areas: ① Automation field: wear-resistant and corrosion-resistant coatings for vibration feeders to reduce noise, room-temperature curing wear-resistant materials for conveyor deflection plates, highly adhesive wear-resistant materials for spiral classifiers, wear-resistant and corrosion-resistant components for conveyor idlers, wear-resistant materials for robotic arms, mold protection, etc ； ②Modern transportation: wear-resistant materials for interior linings of street cleaning vehicles, surface coating for fishing boats, wear- and corrosion-resistant coatings for salt/sand containers and stretching machines ； ③Energy industry: various vibrating screens for mines, slurry pumps, magnetic separation drums, magnetic separators, thickeners, flotation machines, pipeline linings, elbows, spiral agitators, and anti-corrosion coating materials for chutes ； ④Wastewater treatment industry: agitators, filter presses, garbage trucks ； ⑤Water industry: wear-resistant and corrosion-resistant pumps, valves, delivery pipelines, etc ； Other industries: medical equipment, wear and corrosion resistance for food and chemical processing equipment, sterile protection in workshops, radiation protection in nuclear power plants, wear and corrosion resistance for fan impellers in power plants, inner and outer walls of metal containers, pipelines and storage tanks in chemical, steel, and petrochemical plants, equipment in cement factories, waste treatment equipment, etc ； In addition to wear and corrosion resistance, spray-applied polyurethane elastomers can also be used as cold-vulcanizing adhesive materials, and are widely applied in the fields of port belt repair, bonding, and conveyor belt repair. Secondly, it is necessary to ensure proper fixation of the magnetic system; stainless steel plates can be used to wrap around the magnetic elements. The joints at both ends of the stainless steel plates are secured using thin plates and bolts, which are then used to adjust the degree of tension. This not only has a minimal impact on the magnetic field at the surface of the magnet system, but also exerts a sufficiently strong wrapping and tightening force on it, yielding significant results. Drum without protection and drum with protection: