MAURITANIAN GOLD MINING EXLPORER

Gold

AK Corporation has extensive gold exploration and gold processing operations in Mauritania, located in Northwest Africa, and has established multiple CIL gold processing plants with a collective capacity of over 500 tons/day, which use an innovative, environmentally-sound technology to extract gold. Our approach is to develop and implement innovative methods to optimize production while preserving the environment and safeguarding safety.

Working Princple

CIL is cyanide gold extraction process. Firstly, raw material is crushed into less than 10mm by different types of crushers; secondly, crushed material will be ground and classified into 90% of 200mesh, then fine powder will get into thickner, after concentration, add chemical and leach in the leaching tank. After leaching, we can use activated carbon to adsorb gold, then get gold loaded carbon. Finally we can use electrolysis equipment or fire to get gold bar.

Introduction to Flow Chart

Raw materials preparation

Raw ores are sent to primary crusher by vibrating feeder, then sent to the secondary crusher by belt conveyor; the crushed ores will be sent to vibrating screen for separating. Under screen ores will be sent to powder silo. Upper screen ores will be sent to tertiary crusher by belt conveyor for re-crushing, and the crusher ores will be sent to the screen again to be separated. It is named three step one closed circle crushing flow chart.

Leaching and adsorption

The slurry will enter into 8 sets of double impeller leaching tank; well-mixed sodium cyanide agents are added to the first tank; active carbon is added to the tanks from the second to the eighth; active carbon from the second agitator is lifted to carbon screen to get gold-loaded carbon, and after cleaning, the gold-loaded carbon enters into the desorption & electrolysis system; while the slurry left goes back to the second tank; active carbon is lifted by air lifter from the tank next to the tank before against the current; the tailing goes through safety screen to recycle fine-size gold-loaded carbon, and then goes to tail water treatment stage.

Tail water treatment

The tailings are lifted to the filter press, and the filter cake is so called tailings, which are transported by belt conveyor and truck to the yard, while filter liquor goes to circulating water tank for recycling, which helps save the lime and sodium cyanide.

Gold-loaded carbon treatment

The gold-loaded carbon is processed by Desorption&Electrolysis equipment in batches to get gold-dust. The gold-dust goes to gold melting furnace and turns to gold bar. The gold-loaded carbon after Electrolysis process could return to last stage in the flow chart for reprocessing.

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