Gold extraction refers to the processes required to extract gold from its ores. This may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore. Gold mining from alluvium ores was once achieved by techniques . The Chemistry of Gold Extraction.
Gold cyanidation is a hydrometallurgical technique for extracting gold from low-grade ore by .. Jump up ^ Greenwood, N. N.; & Earnshaw, A. 1997. Chemistry of the Elements 2nd Edn., Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.