The Clean Mining gold recovery process, developed by Australias CSIRO, replaces cyanide and mercury with a safer, less hazardous chemical reagent. This alternative gold recovery solution is non toxic and dissolves fine gold out of ores into a solution, which can then be recovered through further processing.
The gold mining industries are among the largest consumers of cyanide due to its high affinity with gold. After the precious metal has been extracted from ore, cyanides are discharged as effluents and as solid mine tailings. Cyanides are highly toxic and their toxicity is related to their physicochemical speciation.
2Río Narcea Gold Mines Ltd. Asturias. Spain. 3. School of Civil Engineering and Geosciences. University of Newcastle. UK. Abstract . In the gold mining industry, tailings from the cyanide leaching process contain variable quantities of a number of cyanide compounds; as tailings are
Toxic sodium cyanide has been used in gold mining since 1887, and it remains the primary reagent in use for gold processing today because it allows for efficient extraction of gold from low grade ore. Since a tailings dam burst at gold mining company Auruls Baia Mare mine in Romania in 2000, leaking cyanide into the Somes River and killing ...