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  2. Gold extraction - Wikipedia

    en.wikipedia.org/wiki/Gold_extraction

    Gold extraction is the extraction of gold from dilute ores using a combination of chemical processes. Gold mining produces about 3600 tons annually, [1] and another 300 tons is produced from recycling. [2] Since the 20th century, gold has been principally extracted in a cyanide process by leaching the ore with cyanide solution.

  3. Gold cyanidation - Wikipedia

    en.wikipedia.org/wiki/Gold_cyanidation

    Gold cyanidation (also known as the cyanide process or the MacArthur–Forrest process) is a hydrometallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complex. It is the most commonly used leaching process for gold extraction. [1]

  4. Gold mining - Wikipedia

    en.wikipedia.org/wiki/Gold_mining

    The dominant method for refining gold is a cyanide extraction method, or gold cyanidation, introduced in the late 1800s. This a metallurgical technique used to extract gold from lower grade ores by converting gold into a water-soluble coordination complex. [56] [57] Finely ground rock is treated with a solution of sodium cyanide.

  5. Gold panning - Wikipedia

    en.wikipedia.org/wiki/Gold_panning

    Panning for gold in a creek bed Gold in the pan, Alaska Man gold panning in Fairplay, Colorado early 1900s with dog. Gold panning, or simply panning, is a form of placer mining and traditional mining that extracts gold from a placer deposit using a pan. The process is one of the simplest ways to extract gold, and is popular with geology ...

  6. Orogenic gold deposit - Wikipedia

    en.wikipedia.org/wiki/Orogenic_gold_deposit

    Methods of delineating reserves and of extracting gold ore are improving over time, increasing the possibility for production of more gold. [47] On the other hand, the environmental impact of extracting gold from orogenic gold deposits, such as cyanidation , is coming more under consideration over time. [ 48 ]

  7. Placer mining - Wikipedia

    en.wikipedia.org/wiki/Placer_mining

    The simplest technique to extract gold from placer ore is panning. This technique has been dated back to at least the Roman Empire. [ 11 ] In panning, some mined ore is placed in a large metal or plastic pan, combined with a generous amount of water , and agitated so that the gold particles, being of higher density than the other material ...

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  9. Extractive metallurgy - Wikipedia

    en.wikipedia.org/wiki/Extractive_metallurgy

    Extractive metallurgy is a branch of metallurgical engineering wherein process and methods of extraction of metals from their natural mineral deposits are studied. The field is a materials science, covering all aspects of the types of ore, washing, concentration, separation, chemical processes and extraction of pure metal and their alloying to suit various applications, sometimes for direct ...

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