At Waste Expo earlier this year, Eriez introduced several new products, including their new RevX-E Eddy Current Separator (ECS), along with the new P-Rex (Permanent Rare Earth Xtreme) scrap drum and their new ProSort II Airless Metal Recovery System.
The new RevX-E ECS features an eccentric magnetic rotor to allow a single point of separation, which is different than a concentric design. “Now Eriez offers both an eccentric and concentric ECS, enabling customers to choose the right model for their application,” says Mike Shattuck, Eriez’ Heavy Industries Project Manager. “An eccentric style ECS offers one chance of separating small particles, while a concentric model offers maximum expulsion over the whole area of the outer shell.”
Eddy current separators allow PET flake recyclers to obtain high purity and yield
Also recently announced by Eriez, is the fact that their latest line of Eddy Current Separators is designed to deliver exceptional nonferrous particle separation from PET flake. The company says recyclers can obtain a single pass aluminum reduction up to 92 percent and achieve a clean PET yield of 97 to 99 percent. According to studies conducted by Eriez, a one percent improvement in good product yield can save a company up to $230,000 in recycled PET annually, with a 60-inch wide Eddy Current Separator.
Once the PET is purified, it can be re-used to make fibre or banding, or blended to make recycled content beverage and food containers. Recycled PET can be used in such diverse products as carpet, food containers, clothing, auto parts, tool handles and sleeping bag insulation.
Eriez’ Eddy Current Separators use powerful Rare Earth magnets that are arranged into a high-speed, composite shelled rotor. The PET containing metal contaminants – such as aluminum – is fed onto a conveyor belt in a controlled, low-density thin layer. The belt then passes over the rotating magnets and eddy currents are created in the aluminum. When the polarity of the magnetic field around the aluminum is the same as the rotating magnets, the aluminum is repelled from the magnet. This causes the trajectory of the nonferrous metal to be different than the PET flake. The two streams of material are then separated by an adjustable splitter in a simple, high-volume manner.
The heart of the separator on Eriez' units is the Rare Earth Arched (REA) rotor, which uses powerful Rare Earth magnets that are curved to the shell contour. This high-frequency rotor has 22 poles and offers effective removal of small and medium nonferrous metals from aluminum cans as well as electronic scrap, plastics, glass cullet, foundry sand and urban wood waste. This REA rotor uses patented Kevlar/ceramic tile surface shells and grease retainer chambers, and is balanced to operate up to 3,200 RPM. According to Eriez, normal bearing life with good maintenance is calculated to be more than 15 years.
Equipment controls are housed in a NEMA 4-rated enclosure and include a belt speed tachometer. Also available is an Eriez vibratory pan feeder, hopper and belt conveyor to ensure an even, controlled flake depth, which enhances separation performance.
Eriez
