NioCorp Developments' (TSX: NB; US-OTC: NIOBF) demonstration-scale processing plant in Trois-Rivieres, Que., has started processing ore samples from the company's Elk Creek critical minerals project in Nebraska. The plant is intended to demonstrate that the company can extract and separate rare earth elements from ore mined at the project, and that its simplified process for producing niobium, scandium and titanium is both technically and economically feasible.
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