Belt Cleaner

A belt cleaner is an essential component of the RAP Conveyor system designed to scrape off asphalt, aggregate, and other materials that adhere to the conveyor belt surface after discharge. It prevents material buildup, reduces spillage, protects belt integrity, and ensures efficient material transfer in asphalt recycling operations. The cleaner is typically installed at the head pulley or along the return side of the belt, where it removes carryback that would otherwise accumulate on idlers, pulleys, and the floor, leading to increased maintenance and safety hazards. The device consists of a robust frame, one or more blades, and a tensioning system that maintains blade contact with the belt. Blades are available in polyurethane, tungsten carbide, and ceramic, each suited to different applications: polyurethane for general cleaning, tungsten carbide for aggressive scraping, and ceramic for high-wear conditions. The frame can be made of carbon steel or stainless steel, with stainless steel recommended for corrosive environments. The belt cleaner is designed for belt widths from 500 to 2400 mm, belt speeds from 0.5 to 6.0 m/s, and operating temperatures from -20°C to 80°C. Blade hardness ranges from 55 to 65 Shore A (ASTM D2240), and the tension adjustment range is 50 to 150 mm. Maximum operating pressure is 0.5 to 1.0 MPa, and mounting clearance required is 200 to 400 mm. The weight varies from 15 to 120 kg depending on width and material. These values are reference ranges; the actual model must be selected based on specific conveyor parameters and application conditions. Always verify model-specific values and standards with the legal manufacturer or supplier.

The belt cleaner uses blades or scrapers (typically made of polyurethane or tungsten carbide) that press against the returning conveyor belt surface. As the belt moves, these blades mechanically remove adhered materials through direct contact, with tension systems maintaining optimal pressure for effective cleaning without damaging the belt. The tensioning mechanism allows adjustment as the blade wears, ensuring consistent contact. The blade material and hardness are chosen based on the material being conveyed and the operating conditions. The cleaner is positioned to intercept carryback before it can cause buildup or damage.