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  2. 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.

  3. Recycling by material - Wikipedia

    en.wikipedia.org/wiki/Recycling_by_material

    An estimated 80% of all copper ever mined is still in use today. [15] In volume, copper is the third most recycled metal after iron and aluminium. [16] As of 2023, recycled copper supplies about one-third of global demand. [17] The process of recycling copper is roughly the same as is used to extract copper but requires fewer steps.

  4. Electrowinning - Wikipedia

    en.wikipedia.org/wiki/Electrowinning

    In electrowinning, an electrical current is passed from an inert anode through a leach solution containing the dissolved metal ions so that the metal is recovered as it is reduced and deposited in an electroplating process onto the cathode. In electrorefining, the anode consists of the impure metal (e.g., copper) to be refined. The impure ...

  5. Electronic waste - Wikipedia

    en.wikipedia.org/wiki/Electronic_waste

    One way e-waste is processed is by melting circuit boards, burning cable sheathing to recover copper wire and open- pit acid leaching for separating metals of value. [16] Conventional method employed is mechanical shredding and separation but the recycling efficiency is low.

  6. Refining (metallurgy) - Wikipedia

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

    The purest copper is obtained by an electrolytic process, undertaken using a slab of impure copper as the anode and a thin sheet of pure copper as the cathode. The electrolyte is an acidic solution of copper (II) sulfate. By passing electricity through the cell, copper is dissolved from the anode and deposited on the cathode. However ...

  7. Metallurgical furnace - Wikipedia

    en.wikipedia.org/wiki/Metallurgical_furnace

    A metallurgical furnace, often simply referred to as a furnace when the context is known, is an industrial furnace used to heat, melt, or otherwise process metals. Furnaces have been a central piece of equipment throughout the history of metallurgy; processing metals with heat is even its own engineering specialty known as pyrometallurgy.

  8. Copper extraction - Wikipedia

    en.wikipedia.org/wiki/Copper_extraction

    In the US, more copper is recovered and put back into service from recycled material than is derived from newly mined ore. Copper's recycle value is so great that premium-grade scrap normally has at least 95% of the value of primary metal from newly mined ore. [80] In Europe, about 50% of copper demand comes from recycling (as of 2016). [81]

  9. Scrap - Wikipedia

    en.wikipedia.org/wiki/Scrap

    ] Scrap recycling also helps reduce greenhouse gas emissions and conserves energy and natural resources. For example, scrap recycling diverts 135 million short tons (121,000,000 long tons; 122,000,000 t) of materials away from landfills. Recycled scrap is a raw material feedstock for nearly 60% of steel made in the US, almost 50% of the copper ...

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