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How does an eddy-current separator remove aluminum cans from a conveyor belt?
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recycling
Plastic, glass, and metal containers in a recycling bin.
An eddy-current separator is a specialized device used in a material recycling facility to isolate nonferrous metals, such as aluminum, from other materials like plastics.
As the conveyor belt carries a mixture of materials, the separator generates a rapidly changing magnetic field. This field induces electrical currentsâknown as eddy currentsâwithin the conductive aluminum cans. These currents create their own magnetic field that opposes the magnetic field of the separator, resulting in a repulsive force. This force effectively "kicks" or repels the aluminum cans off the conveyor belt, allowing them to be collected separately from the remaining non-metallic waste.1