TROMMELS AND SCREENS

“After Magnetic Separation, the ASR stream consists of approximately 10-15% Non-Ferrous metallics (Aluminum, Zinc, Brass Copper, etc.) mixed with non-metallics (glass, sand, dirt, plastics, rubber, wood, etc.). A typical first step in processing the ASR stream for maximum metal recovery is to screen the stream. This is done for two purposes: (1) Remove fine material from the stream as waste and (2) Separate the ASR into different streams, by size, to allow for optimum performance of further downstream metal capture devices. The most common method of separation is using a rotating trommel with screens that will perform both purposes. Alternatively, flat deck screens can be used, primarily for more efficient separation of fine material. The screens can be designed in single or multiple stages, based on production throughput requirements.

Technical Design Features:

• Steel Support Structure, w/ Wrap Around Platforms & Ladder Access.
• Octagonal (or Hexagonal) Tube Design. Skeleton Frame w/ Bolt-In Screens.
• 6 Degree Tapered Skid Frame w/ Side Skirts.
• Heavy Duty & Pivoted Thrust Rollers to Allow for Uneven Surface of Wheel.
• Inlet & Discharge Hoppers, as required.
• Up to 60” Tubes uses Dual Friction Drives w/ Sealed Gearmotors.
• Above 60” Tubes uses #200 Chain Wrap Drive w/ Single Gear Reducer Drive.
• Tube Supported on Hi-Load Urethane Wheel Assemblies.
• Articulated Urethane Thrust Rollers.
• Heavy Duty Machined Roller Track Wheels.
• Flat Screens use Step Deck Screens to Separate Fines & Minimize Plugging.
• Dust Cover for Weather Protection and Improved Performance.

Options: Variable Frequency Drive, Shaft Mounted Gearboxes, Patented “Select Screen” Allows for Adjustable Openings in Screens Equal Greater Operational Flexibility.