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Mineração Serra Verde (“MSV” or “Serra Verde”) is an advanced development stage project located in central Brazil, a mining friendly jurisdiction. The size and grade of the resource and the deposit’s ionic clay geology and freely liberated mineralization, which is analogous to the well-known heavy rare earth southern Chinese deposits, provide for cheaper, simpler processing and lower capex versus peers.
Test work results to date indicate that Serra Verde’s main saprolite mineral type is amenable to heap leaching for the recovery of REEs (rare earth elements).
Leach grade material will be delivered to primary crushing feed bins using 40 t haul trucks. Further, overland conveyors will be used to deliver material from the mine pits to the crushing area. Ore is crushed, agglomerated, stacked, and then leached to recover REE. The ore will be crushed in two stages using primary and secondary sizers in open circuit. Crushed ore will be agglomerated in drums and then conveyed to the heap leach area. Agglomerated ore will be stacked at 3 m of height to be heap leached using sodium chloride solution at 58 g/L and pH 2. When the leaching process is completed, ore will be rinsed with acidified clear water, obtained from the pregnant leach solution (PLS) using nano filtration (NF) and reverse osmosis (RO). After washing, the spent ore is reclaimed from the leach pad using a front-end loader. Reclaimed material will be transferred to the tailings facility using haul trucks.
PLS from the heaps will be filtered and pre-concentrated in an NF-RO plant which will generate wash water for the heap as well as upgrade the solution strength. The concentrated solution will be treated in a hydrometallurgical plant to remove impurities and precipitate an intermediate mixed rare earth carbonate.
MSV takes environment issues very seriously and is a priority for its development.
All action, procedures, reports and licensing requirements are followed and delivered in accordance with specific Environmental Laws and Rules.
MSV works with high qualified Environmental consultants to assure the best results in all its actions.
Permitting advances in close collaboration with local community, as well as state and federal regulators and agencies