Greenland Minerals and Energy has offered an update on the enhancements to the proposed hydrometallurgical treatment of high-grade mineral concentrates that will be obtained from the Kvanefjeld multi-element project of the company.
Recent updates have also been provided by the company on additional enhancements to the proposed beneficiation circuit to obtain high-grade mineral concentrates from Kvanefjeld.
The technical team of GMEL has validated process improvements in the atmospheric leach phase of the flowsheet helping to produce a clean separation between uranium and REEs.
Cleaner product separation enables major circuit simplification thus enhancing overall product recovery and bringing down costs. An easy and excellent process for the treatment of Kvanefjeld ore was released in May 2012 in the PFS of the company. From such time, the company has continually devoted significant resources to additional development of this flowsheet and can report to the improvements listed below:
- High uranium recovery by 4%
- Increased rare earth recovery by 27%
- Reduced capital costs to USD1.3B
- Reduced rare earth oxide unit costs to USD $3/kg
Due to the strange nature of the U-bearing and the REE minerals, atmospheric leaching is possible for the Kvanefjeld deposit. The ore minerals were formed in an alkaline environment and are not fully stable when taken away from such an environment. It is essential to note that these innovative materials have not been changed to common yet more refractory and U-bearing and REE minerals.