ore dressing equipments in open pit gold ore dressing

Ore Dressing Machine For Gold Ore Dressing Explained How Is Gold Extracted From Gold Ore Sciencing Gold is usually found alone or alloyed with mercury or silver but can also be found in ores such as calaverite sylvanite nagyagite petzite and krennerite Most gold ore now comes from either open pit or underground mines The ores sometimes contain as little as 5 100 of an ounce of gold