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  2. Urban mining - Wikipedia

    en.wikipedia.org/wiki/Urban_mining

    Originally, an urban mine is the stockpile of rare metals in the discarded waste electrical and electronic equipment (WEEE) of a society. [4] Urban mining is the process of recovering these rare metals through mechanical and chemical treatments. In 1997, recycled gold accounted for approximately 20% of the 2700 tons of gold supplied to the ...

  3. Wilfley table - Wikipedia

    en.wikipedia.org/wiki/Wilfley_table

    The Wilfley Table became a design used world-wide due to the fact it significantly increased the recovery of silver, gold and other precious metals. [3] Such was the table's widespread use that it was included in Webster's Dictionary, [4] and has been in constant use by miners and metallurgists since its invention. [5]

  4. Knelson concentrator - Wikipedia

    en.wikipedia.org/wiki/Knelson_concentrator

    A Knelson concentrator is a type of gravity concentration apparatus, predominantly used in the gold mining industry. It is used for the recovery of fine particles of free gold, meaning gold that does not require gold cyanidation for recovery.

  5. Scientists find way to make gold from electronic waste

    www.aol.com/news/scientists-way-gold-electronic...

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  6. Electronic waste recycling - Wikipedia

    en.wikipedia.org/wiki/Electronic_waste_recycling

    Computer monitors are typically packed into low stacks on wooden pallets for recycling and then shrink-wrapped. [1]Electronic waste recycling, electronics recycling, or e-waste recycling is the disassembly and separation of components and raw materials of waste electronics; when referring to specific types of e-waste, the terms like computer recycling or mobile phone recycling may be used.

  7. Electronic waste - Wikipedia

    en.wikipedia.org/wiki/Electronic_waste

    Electronic waste (or e-waste) describes discarded electrical or electronic devices. It is also commonly known as waste electrical and electronic equipment (WEEE) or end-of-life (EOL) electronics. [1] Used electronics which are destined for refurbishment, reuse, resale, salvage recycling through material recovery, or disposal are also considered ...