Australia-based American Rare Earths, which operates a US subsidiary called Wyoming Rare, has advanced the pilot plant program for its Halleck Creek Project in Wyoming to produce a high-purity separated rare earth oxide.

The company has signed agreements for initial processing to be done in Wyoming through Western Research Institute in Laramie and DISA Technologies in Casper, followed by a final stage of hydrometallurgical processing and oxide separation at the Saskatchewan Research Council (SRC) in Saskatoon, Canada.

The pilot plant program has been structured in three stages. The first two stages, milling and sizing followed by mineral separation and concentration, will take place in Wyoming. SRC will handle leaching, impurity removal and oxide refining in the third stage.

This will allow the front end of the pilot plant processing to stay in Wyoming, as it will process ore that has already been extracted from the American Rare Earths Halleck Creek site and stockpiled in Laramie. It will then leverage the downstream facility at SRC to accelerate production, the company said.

The pilot plant will use DISA’s patented high-pressure slurry ablation (HPSA) technology to handle coarser particle sizes and then use the GradePro reflux classifier and induced roll magnetic separators to perform primary mineral separation and secondary concentration.

The SRC facility has a similar process configuration to the type of downstream processing facility American Rare Earths intends to build in Wyoming. The company will use the data generated during the pilot campaign to further develop its plans for the commercial plant and mine.

“The pilot plant and production of pre-production rare earth oxide were previously expected to take several years. This defined pilot pathway now materially shortens the timeline and positions the Company to deliver outcomes within months,” said Mark Wall, CEO of American Rare Earths.

Source: American Rare Earths