|About this Abstract
||Part C-3: Processing of Critical Metals
||A Process Flowsheet for the Extraction of Niobium, Titanium and Scandium from Niocorp’s Elk Creek Deposit
||Niels Verbaan, Mike Johnson, Tassos Grammatikopoulos, Eric Larochelle, Scott Honan, Kelton Smith, Rick Sixberry
|On-Site Speaker (Planned)
NioCorp is developing the niobium/scandium/titanium Elk Creek carbonatite resource deposit. The carbonatite phase contains significant niobium (0.71% Nb2O5), titanium (2.68% TiO2) and scandium (72 g/t) and is composed predominantly of calcite, dolomite and ankerite. Niobium is mostly (80%) contained in the pyrochlore and the balance in various Fe-Nb-Ti oxides, which also hosts the titanium. Scandium is distributed homogeneously throughout the ore mineral assemblage.The process flowsheet recovers separate niobium, titanium and scandium products. Scandium is extracted from whole ore hydrochloric acid leach solutions through solvent extraction, and is further refined through a re-leach and precipitation process. Scandium leach residues are treated in a sulphuric acid sulphation process to recover separate niobium and titanium precipitates. Both hydrochloric acid and sulphuric acid reagents are recycled within the flowsheet.This paper will discuss key bench and pilot test results and will present a conceptual flowsheet developed by the project team for NioCorp at SGS Minerals.
||Planned: At-meeting proceedings