Earlier people washed gold by hand-washing to gain coarse gold. With development of society, there is a great improvement in the gold beneficiation about the flow sheet and mining machinery. Forui here introduces some of the plants and methods for the sand gold ore beneficiation, hoping it can be a favor to you.
The density of gold is big, while that of the waste stone without gold is small, so the gravity separation can work easier to separate gold out. And the involved machine is mainly gravity machines like jigger, sluice, shaking table and so on. The jigger takes a great advantages over the gold recovery, esp. for coarse gold with its recovery rate over 95%, high efficiency, energy-saving, and environment-friendly. It is the prior machine to chosen for the gold separation machines.
Sand gold is put into the jigger, and high-grade gold concentrate can be gained from the jigger. And for this kind of concentrate, amalgamator or shaking table can be used for further purification.
Gold gravity separation makes use of gravity forces of materials with different density and difference of mineral granules to enrich gold from the ore. Gravity separation is widely used in gold enrichment for both placer gold ore anf rock gold ore. Gravity separation can separate gold from the impurities because there is a big density difference between gold and impurities.
Gravity separation is the most common, most important and the simplest method to extract gold from the gangue. The gravity separators for gold ore concentration cover jiggers, spiral chute, centrifugal separator, shaking table. The feeding size for each gravity seprator is different. And before separation, screeing or classifying will be a necessity.
Gravity separation is also an important beneficiation method for quartz gold ore. And usually gravity separation and floatation separation can be combined to work together. The gravity separation can recover the coarse gold when milling making it better for further floatation separation and cyaniding and improving the recovery rate.
