The separation principle of placer gold is to recover gold and its associated heavy minerals from the raw ore to the maximum extent by gravity separation, and then separate gold and heavy minerals from each other by gravity separation, flotation, mercury mixing, magnetic separation and electrical separation to achieve comprehensive recovery. The separation process of placer gold is usually divided into three operations.
The cemented mineral sand is separated by water immersion, washing and mechanical agitation, and the gravel, sand and clay are separated, and the clay and gold particles adhered to the gravel are cleaned. Ore washing includes three processes: crushing, screening and desliming.
According to the process flow and the main equipment used, it can be divided into fixed chute shaker flow, fixed or belt movable chute jigger shaker flow, multi-stage jigger shaker flow, centrifugal disk separator shaker flow, etc.
The gold grade of the gold containing concentrate obtained in the roughing stage is about 100g / T, and the heavy minerals are mostly 1-2kg / T. At present, the following methods are mainly used to treat gold bearing coarse concentrate: the gold particles are manually panned out with a gold pan and then discarded with heavy sand; Use the mercury mixing cylinder to mix mercury inside, and discard the heavy sand after obtaining the mercury paste; After the gold is extracted by manual washing or mercury mixing, the heavy sand is sent to the concentration plant for treatment, and various heavy sand minerals are recovered by magnetic and electric separation methods.
Xinhai can help you complete the work of extracting gold from placer gold mines, and can provide general contracting services for gold extraction from placer gold mines. If necessary, please contact our online customer service.
