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  2. Should You Melt Down Pennies for Profit? Not U.S. Pennies ...

    www.aol.com/news/2012-05-11-should-you-melt-down...

    A penny, on its face, is worth one cent. $0.01 U.S. dollars. On the other hand, that same penny -- if melted down for the copper it contains -- could be worth quite a bit more.

  3. Smelting - Wikipedia

    en.wikipedia.org/wiki/Smelting

    Smelting involves more than just melting the metal out of its ore. Most ores are the chemical compound of the metal and other elements, such as oxygen (as an oxide), sulfur (as a sulfide), or carbon and oxygen together (as a carbonate). To extract the metal, workers must make these compounds undergo a chemical reaction.

  4. Non-ferrous extractive metallurgy - Wikipedia

    en.wikipedia.org/wiki/Non-ferrous_extractive...

    Copper extraction in particular is of great interest in archeometallurgical studies since it dominated other metals in Mesopotamia from the early Chalcolithic until the mid-to-late sixth century BC. [ 11 ] [ 12 ] There is a lack of consensus among archaeometallurgists on the origin of non-ferrous extractive metallurgy.

  5. Refining (metallurgy) - Wikipedia

    en.wikipedia.org/wiki/Refining_(metallurgy)

    In one of the previous melting stages, lead was added. Gold and silver preferentially dissolved in this, thus providing a means of recovering these precious metals. To produce purer copper suitable for making copper plates or hollow-ware, further melting processes were undertaken, using charcoal as fuel. The repeated application of such fire ...

  6. Aluminum Can Prices: Are They Still Worth Collecting?

    www.aol.com/aluminum-prices-much-yours-worth...

    Tin scrap in the U.S. generally goes for $110 per ton on today's open market. The value of a single tin can would calculate as a fraction of a cent as a result. What are the latest scrap metal prices?

  7. Recycling - Wikipedia

    en.wikipedia.org/wiki/Recycling

    This is an accepted version of this page This is the latest accepted revision, reviewed on 10 December 2024. Converting waste materials into new products This article is about recycling of waste materials. For recycling of waste energy, see Energy recycling. "Recycled" redirects here. For the album, see Recycled (Nektar album). The three chasing arrows of the universal recycling symbol ...

  8. Recycling by material - Wikipedia

    en.wikipedia.org/wiki/Recycling_by_material

    In volume, copper is the third most recycled metal after iron and aluminium. [14] An estimated 80% of all copper ever mined is still in use today. [15] According to the International Resource Panel's Metal Stocks in Society report, the global per capita stock of copper in use in society is 35–55 kg. Much of this is in more-developed countries ...

  9. Copper extraction - Wikipedia

    en.wikipedia.org/wiki/Copper_extraction

    The copper ions are liberated from the residue with sulfuric acid. The barred (denuded) sulfuric acid recycled back on to the heaps. The organic ligands are recovered and recycled as well. Alternatively, the copper can be precipitated out of the pregnant solution by contacting it with scrap iron; a process called cementation. Cement copper is ...

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