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Shards of plastic, metal, and fiberglass are spit out the other side (below). The shredded phones are heated in ovens that incinerate the plastic. What’s left goes into a melting furnace to produce a metal alloy covered with a brownish layer called slag, which consists mostly of silica. The slag is removed and later sold for use in shingles and road construction.

The remaining alloy is cooled into bars.

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Tagged: Communications, cell phones, waste, recycling

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