How is shredded metal actually sorted or graded after it comes out of a shredder — is it automated?
Short answer: Sorting is largely automated at industrial scale: overhead magnets pull out ferrous steel first, then eddy-current separators use rapidly alternating magnetic fields to physically fling non-ferrous metals like aluminium and copper away from non-metal residue, with some larger operations adding optical or sensor-based sorting to further separate metal types by their spectral or density signature.
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List Free →Magnetic separation handles the easy split first
Ferrous metal (iron and steel) is straightforwardly magnetic, so an overhead magnetic separator on the conveyor line pulls it out of the shredded stream immediately with high reliability.
Eddy-current separation catches non-ferrous metal
Aluminium, copper, and other non-ferrous metals aren’t magnetic, so eddy-current separators use a rapidly changing magnetic field to induce currents in these metals that physically fling them away from the remaining non-metal stream — a clever piece of engineering that does this without touching the material.
Advanced facilities go further
Larger, better-equipped operations add optical sorters or sensor-based systems (like X-ray transmission or laser-induced spectroscopy) to distinguish between different non-ferrous metals, further increasing the purity of the sorted output.
How ScrapTrade Makes This Easier
This automated sorting is exactly why loosely mixed scrap still gets recovered — but presorting your own load before selling through ScrapTrade still nets you a better price than relying on someone else’s shredder to do it for you.
Ready to sell scrap metal without guessing how a buyer processes it? ScrapTrade connects verified buyers and sellers with escrow-protected payments and transparent weighing.
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