Ideal for use in the recycling industry, the
eddy current separator (ECS) machine uses powerful, permanent
magnets that produce repelling forces for separation of various
Marshall Gralnick is president of the Magnetics
Division of Global Equipment Marketing, Inc. According to him,
“The popularity of eddy current separators has increased considerably
in the past few years. As recycling trends have grown, so has
the need for this product. Originally, the ECS was designed for
the separation of large pieces of nonferrous metal with a size
in excess of .5” – items such as aluminum, copper and others.
Today, the need for separation of smaller ground or shredded
pieces of nonferrous is a requirement that most ECS manufacturers
are able to accommodate, including our company, Mastermag.”
Mastermag is the brand name for the corporation’s
ECS products. Gralnick said that during the past 18 years, the
company has offered a growing range of ECS systems, for any type
of product and volume throughput.
Their new product line includes an ECS with
12” diameter concentric-designed rotors and 24 poles. According
to Gralnick, it is one of the most powerful rotors to be offered
in an ECS anywhere in the world. The ECS units also offer vibratory
feeders for even distribution onto the ECS belt – which is made
of abrasion-resistant PVC material.
Mastermag offers a Belt Change Jacking System,
which is designed to speed the belt-changing process so downtime
is reduced. All units include variable speed motors for ECS rotors
and conveyors. Rotors can be operated in forward and reverse
“Another product addition, the rare earth
magnetic drum, is integrated into our ECS system and includes
chutes for discharge of any separated ferrous metals. This is
critical for any ECS unit, because if too much ferrous material
is exposed to the rotor, the resulting damage will eventually
destroy the rotor – the heart of the system. A rotor cannot be
easily repaired without a total rebuild, at a cost that can approach
45 percent of the total system, depending on the size and type
of rotor,” Gralnick said.
“The smallest ECS systems made today are
used for the separation of aluminum beverage cans. This is the
easiest separation for an ECS. The rotors used for this application
range from 4” to 7” in diameter. At Mastermag, production and
sales of all types of ECS systems have increased 71 percent in
the past 12 months, worldwide.”
He added, “ECS systems are evolving into
full-scale separation systems, handling all types of ferrous
and nonferrous metals and further integration with other separation
systems that may handle glass, plastics and other materials.
This is extremely important when dealing with e-recycling – a
fast-growing segment of the recycling industry.”
ECS manufacturer Eriez claims to offer the
“original” eddy current separator. Mike Shattuck, project manager
for Eriez, said that their products offer superior separation
and are the right solution for any industry that requires an
eddy current separator.
Products are available in feed widths of
up to 80” and are available for use in various applications.
Eriez’s FERRITE series is a basic economical rotor which removes
larger, nonferrous metals in light-duty applications such as
separating aluminum cans from trash.
REA is the company’s most popular rare earth
rotor, which removes small to medium-size nonferrous metals from
e-scrap, plastics, glass cullet, foundry sand, wood waste, MRFs
and municipal solid waste plants. Eriez’s REO line utilizes a
more powerful rare earth rotor, and is the company’s heavy-duty
model. It is used to remove large nonferrous metals in high capacity
auto shredding and municipal solid waste applications. It generally
provides higher recoveries, which result in a quicker return
XTREME™ is the machine with the most versatile
rotor. The powerful, heavy-duty unit features a long throw to
recover very small and very large nonferrous in high-capacity
applications. Long throw improves separation, delivering a better
grade product. SUPER, the machine with Eriez’s most powerful
rotor, includes large magnetic poles that are used in select,
high-tonnage applications, where maximum recovery is required.
The newest Eriez ECS is the RevX-E™. It employs
an eccentric magnetic rotor for separation of nonferrous metals
and is designed with an eccentrically-mounted magnetic rotor
within a non-conductive, larger diameter shell. “This eccentric
rotor concentrates eddy current forces into a zone of separation
at the end of the belt. By focusing the function in this way,
the machine process ignores ferrous items in the flow of material.
The eccentric rotor design reduces long-term wear due to heated
ferrous build up,” Shattuck explained.
Henry A. Wiltschek Inc. is the manufacturer
of the “CanSort,” a turn-key rare earth neodymium eddy current
separator. The CanSort offers concentric or eccentric rotors,
depending on the application involved, whether it be ASR, fines
metal recovery or electronic scrap sorting, with adjustable splitters.
Units are also available with lower-priced ferrite eddy current
rotors for UBC sorting.
Henry Wiltschek, company owner and president
said, “Machines are available from 24” to 70” width options,
with various belt cleaning systems. The control cabinets for
our products are equipped with digital read-outs for conveyor
belt speed, rotor RPMs and brake resistors for the eddy current
motors. The bearings are easily accessible for greasing.”
The company also offers compact and versatile
eddy current units, material in-feed conveyors, equipped with
magnetic pulleys of varying strengths or a choice of magnetic
crossbelt conveyors, which remove magnetic metals and slightly
magnetized stainless steel, prior to eddy current separation.
The discharge chutes of the eddy currents have sufficient height
for easy removal of the sorted materials by either conveyor or
Bobcat, according to Wiltschek.
He also noted, “The metal and scrap metal
industries have been hit hard by the recession, as most other
industries and businesses, but the economy indicates a slow recovery
and conditions will likely improve by next year. Equipment buyers
have been holding back because of economic uncertainties and
this will also change.”