Aura Energy Limited (ASX: AEE) has completed better than expected results in a successful programme of metallurgical leach test work examining vanadium recovery by acid pressure leaching for the Häggån Vanadium Project in Sweden.
The programme was carried out on a total of three drill hole composite samples defined as representative of the mineralisation within the Häggån Vanadium High Grade Resource following consultation with the ASX on the Häggån Scoping Study.
Aura Energy Executive Chairman Peter Reeve reported that the test work resulted in vanadium recoveries of up to 96.9% to leach solution, with average recovery of 96.5% V2O5.
“This strong result for scoping level leaching test work provides the company with confidence that the proposed process flow sheet for the Häggån Vanadium Project is robust,” Mr Reeve said.
The results of these metallurgical tests exceeded the expectations for recovery of vanadium from the Häggån Resource and provide the company with great confidence that it has developed a robust flow sheet.”
Aura is currently incorporating these results into the Häggån Vanadium Scoping Study and expect to deliver the scoping study shortly allowing progress of the project to its next stages.
In October 2018 Aura announced successful completion of beneficiation and flotation test work for material from the Häggån Vanadium Project.
These results demonstrated recovery of an average of 85% vanadium to a concentrate with an average of 64% of the feed mass. The concentrate mass reduced to a total of 50% of feed mass with removal of the carbon component.
The preferred Häggån Vanadium flow sheet includes beneficiation, acid pressure leaching and solvent extraction of vanadium. The overall expected recovery for the Häggån vanadium process, including each of these components will be included in the Häggån Vanadium Scoping Study.