Extracting Gold | HowStuffWorksRemoving the gold-bearing rock from the ground is just the first step. To isolate pure gold, mining companies use a complex extraction process. The first step in this process is breaking down large chunks of rock into smaller pieces. At a mill, large machines known as crushers reduce the ore to pieces no larger than road.gold processing flow chart of gold bearing quartz,Designing gold extraction processes: Performance study of a case .Mar 8, 2017 . This paper presents a method for externalising and formalising knowledge involving the selection of hydrometallurgical process flowsheets for gold extraction fr.