First part is crushing, typically by two or three stages of crushing, like primary jaw crusher, secondary jaw crusher, and cone crusher, it reduces gold rock sizes from hundreds of millimeters to less than 25 millimeters.
Second part is grinding, gold ores will be sent to ball mill for grinding, this process makes the useful mineral of gold fully free from tailing, thus can be separated by mineral separators in next stage. Spiral classifier or hydraulic cyclone are used with the ball mill to form a closed grinding circuit. Larger size minerals will be sent back for grinding again, while smaller ones will be overflowed to next stage
Third part is mineral separation, by use of mineral separator, typically gold centrifugal concentrator or sluice chute, and shaking table can extract the gold concentrate. Centrifugal concentrator or sluice chute is primary process while shaking table is for refine process.