Gold extraction refers to the processes required to extract gold from its ores. This may require a . The smelting of gold began sometime around 6000 3000 BC. .. Leaching through Bulk Leach Extractable Gold, or BLEG, is also a process that.
The final stage of gold production refining involves removing impurities that remain after the smelting process. Refining companies . For example, white gold is made by combining gold with nickel, silver or palladium. Red or pink gold is.