Sierra Leone Gold Plant Trial Assembly
Manhattan supplied and installed an alluvial gold recovery plant in Sierra Leone.
Gravity concentration is a method used to separate minerals based on their density and particle size. It relies on the principle that denser particles settle faster in a fluid medium, such as water, under the influence of gravity. This process is particularly effective for recovering free gold particles that are fully liberated and of a certain size.
Gravity Separation Processes
Various devices are used to exploit the differences in density between gold particles and gangue minerals. Commonly used equipment includes:
Centrifugal Concentrators:
These devices utilize centrifugal force to enhance the gravitational acceleration experienced by particles in a spinning bowl. Gold particles, being heavier, migrate towards the bowl's walls, while lighter gangue minerals are displaced towards the center.
Shaking Tables:
Shaking tables consist of a deck with riffles and a shaking motion that causes stratification of particles based on density. Heavier gold particles settle into the riffles, while lighter particles are washed away.
Jigs:
Jigs are mechanical devices that utilize pulsating water flow to stratify particles based on density. Gold particles settle into the jig bed, while lighter gangue material is washed away
Advantages of Gravity Concentration:
Low Capital and Operating Costs: Gravity concentration requires minimal energy input compared to other methods, making it cost-effective in the cases where it can be done.
Environmentally Friendly: Gravity concentration does not involve the use of harmful chemicals, making it environmentally sustainable compared to chemical-based processes like cyanidation.
High Recovery Rates: When properly applied, gravity concentration can achieve high recovery rates for free gold particles.
Manhattan, through its operational exposure and experience in underground mining and processing plants, is able to transfer this hands-on knowledge to gold operations whether it is for a new gold project, a refurbishment or expansion. We offer Turnkey Process Plant Solutions.
Contact our team of experts today for your BEST VALUE Gold Processing Solutions.
Carbon-in-Leach (CIL) and Carbon-in-Pulp (CIP) Plants: These are commonly used in gold cyanidation plants. In CIL plants, carbon is added to the leach tanks to adsorb the gold from the cyanide solution, while in CIP plants, the carbon is added in the adsorption tanks. The loaded carbon is then stripped of the gold using various methods for gold recovery.