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  2. 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. [1]

  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.

  4. Gold extraction - Wikipedia

    en.wikipedia.org/wiki/Gold_extraction

    A "refractory" gold ore is an ore that has ultra-fine gold particles disseminated throughout its gold occluded minerals. These ores are naturally resistant to recovery by standard cyanidation and carbon adsorption processes. These refractory ores require pre-treatment in order for cyanidation to be effective in recovery of the gold.

  5. 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]

  6. Borax method - Wikipedia

    en.wikipedia.org/wiki/Borax_method

    The borax method of gold extraction has been used by artisanal gold miners in the Benguet area north of Manila in the Philippines for more than 30 years. Some believe it was in practice as early as the 1900s. [who?] The method is increasingly being seen as a safe alternative to the widespread use of toxic mercury in artisanal gold mining today ...

  7. Carbon in pulp - Wikipedia

    en.wikipedia.org/wiki/Carbon_in_pulp

    Carbon in pulp (CIP) is an extraction technique for recovery of gold which has been liberated into a cyanide solution as part of the gold cyanidation process. [1]Introduced in the early 1980s, Carbon in Pulp is regarded as a simple and cheap process.

  8. In the New Gold Rush, Equipment Suppliers May Strike It Rich

    www.aol.com/news/2011-01-09-gold-rush-equipment...

    In an uncertain economy, gold almost always goes up in value. Little wonder, then, that the vertiginous swoops and dives of the stock market over the past three years have sent gold values to ...

  9. Heap leaching - Wikipedia

    en.wikipedia.org/wiki/Heap_leaching

    Gold heap leaching. Heap leaching is an industrial mining process used to extract precious metals, copper, uranium, and other compounds from ore using a series of chemical reactions that absorb specific minerals and re-separate them after their division from other earth materials.

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