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Scrap metals processing and recycling is the function of re-using metals that have already served their purpose in their original form or product. Scrap metals processing and recycling are an important source of industrial metals and alloys, particularly in the production of steel, copper, lead, aluminum, and zinc. Smaller amounts of tin, nickel, magnesium, and precious metals are also recovered from scrap metals processing and recycling. Impurities consisting of such organic materials as wood, plastic, paint, and fabric can be burned off during scrap metals processing. Scrap metals are usually blended and re-melted to produce alloys similar to or more complex than those from which the scrap was derived.
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