Gold cyanidationWikipedia

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.

Gold & Silver Leaching

Basically gold and silver leaching involves spraying a cyanide solution on the ore to dissolve the metal values, collecting the solution containing the dissolved metals, and recovering the metal from the solution. By eliminating milling, leaching reduces capital cost and startup time for new operations.

leaching techniquesGold Refining

Jan 15, 2013· Leaching ore where you cannot separate the gold by density, the gold would still normally need pretreatment, and to be concentrated if possible (like in froth floatation of sulfide ore), usually the ore pretreated to improve leaching (like in roasting process and sometimes chemical are used in this process), and the leach is usually chosen for its selectivity or how it would act chemically with the ore, sometimes the leach


Thiosulphate leaching is a process that removes gold from gold bearing ores without the use of cyanide.


Heap leaching is a tried and tested mining technique enabling the processing of different kinds of ores which could not otherwise be exploited under viable economic conditions. Modern day heap leaching, which has a relatively low level of energy consumption, is for example

Gold Extraction and Recovery Processes

Various methods such as gravity concentration, flotation, panning, pyrometallurgy, cyanidation etc are available for the extraction of gold metal from its ores. Amongst these methods, cyanidation is the most common method used in the leaching of gold from the ore.

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