Results To Used In Sanankoro DFS
West African focused gold company Cora Gold Limited (AIM: CORA) has received positive metallurgical testwork results from oxide samples taken from its Sanankoro Gold Project in Southern Mali.
CEO, Bert Monro, said the purpose of this testwork was to advance the previous testwork and assess the impact of reagent consumption, residence time, gravity recovery and grind size.
- 94.1% average overall recovery was achieved
- 44% average recovery from gravity
- Over 90% leach recoveries within 4 hours leach time
- demonstrating very quick kinetics and significantly shorter than previous testwork programmes
- Cyanide consumption was varied with an average consumption of 0.17kg/t
- significantly less than previous testwork programmes
- Samples were selected to represent different depth profiles across the oxide deposits of Selin, Zone A and B at Sanankoro
- 279kg of oxide material was tested across the three deposits
- A gravity and Carbon in Leach (‘CIL’) flowsheet was used to determine the recovery of gold
“The results from this metallurgical test programme are excellent. A significant proportion of the gold in the Sanankoro ore can be recovered with gravity with over 90% of the remaining gold leaching from the gravity tails within four hours,” Mr Monro said.
“The quick kinetics should reduce the size of the required leach circuit considerably resulting in a capital saving. Further, a significantly reduced cyanide consumption should also have a favourable impact on operating costs. These results will be used in a trade-off between a conventional gravity & CIL flowsheet and heap leach once ongoing column leach testwork iscompleted. The outcome from the trade-off will be used as the basis of a definitive feasibility study (DFS) to commence next year.”