production process of gold mining

Gold mining in the United States - Wikipedia Gold mining in the United States has taken place continually since the discovery of gold at the Reed farm in North Carolina in 1799. The first documented occurrence of gold was in ia in 1782. Some minor gold production took place in North Carolina as early as 1793, but created no excitement. gold production and refining process - coreopsis ­The final stage of gold production -- refining-- involves removing impurities that remain after the smelting process.Refining companies receive doré bars, as well as scrap gold, and reliquefy the metal in a furnace. Gold & Silver - Department of Energy 7 Gold & Silver Gold has played a prominent role in world economic and political events. Most of the ... 7.1 Process Overview 7.1.1 Surface Mining Surface mining is the primary source of gold and silver. It requires extensive blasting as ... was less than 1 percent of the total domestic production.3    Read More