Gold ore concentrate gravity selction method
For gold ore, there is different way of selection, such as gravity,
artisinal way, Carbon in Leaching (CIL) Plant, Heap leaching and
flotation way according to the ore type of gold. As for gold
gravity mothed, it is mainly applied to the placer gold or rein
gold ore in which there are large amount of free gold particle
sizes. As the free gold particles are much heavier than the common
sand and thus they can be collected by gravity method because of
the gravity method.
For placer gold ore, the most commonly used equipment is rotary
trommel screen machine, gold centrifugal concentrator, and sluice
with gold absorption blanket, which means the sand screening
process ( sand less than 6mm will be screened through the trommel
screen and fed into the concentrator. The centrifugal concentrator
will collect around 80 to 90% free gold among the sand; remaining
gold in the tailing discharged by the concentrator will be
collected in the gold absorption blanket on the sluice.
For the rein gold ore, it will go through the crushing, grinding,
screening and gravity separation, in which the needed equipment
include jaw crusher or hammer crusher (depends on the hardness of
the ore), ball mill or wet pan mill, spiral classifier, centrifugal
concentrator, shaking table, almagamation mercury mixer and gold
electric furnace.
The following essay is the detailed explanation of the rein gold
ore gravity beneficiation plant.
Gold gravity processing plant description
| PROCESS | EQUIPMENT | DETAILED INFORMATION |
| Crushing | Jaw crusher | The jaw crusher is the primary crusher to crush the input stone ore
into less than 20mm, which is suitable to feed the ball mill |
| Transporting | Belt Conveyor | |
| Grinding | Ball mill | Grind the gold ore into powder size between 100 to 300 mesh for the
following gravity selection. |
| Screening | Spiral classifer | It plays the role of screener, the oversized stone discharged by
the ball mill will be returned back to ball mill for regrinding,
qualified sizes are passed to the concentrator for rough selection. |
| Roughing and gravity selection | Gold Centrifugal Concentrator | Whole set, including discharged soft tube. It is to collect the
gold ore concentrate. |
| Gravity separation | Shaking table | To collect the remaining gold in the tailings discharged by
concentrator. |
| Gold collecting | Gold ore sluice | Collect the remaining gold away from the shaking table |
| Power | Electric Control Cabinet | Integrated control cabinet including cable. |
| Note: Whole process, only needs to access external power supply and
four water providing points. |
