Rare earths filtered from phosphate mine waste (Mining Magazine – July 30, 2019)


The project for the Florida Industrial and Phosphate Research Institute had the aim of capturing, extracting and separating rare earth elements (REE) out of both phosphoric acid and the resulting waste.

Precision Periodic, which is a University of Central Florida incubator company, has developed a proprietary nano-filter for extracting and releasing multiple REEs, precious metals, heavy metals and/or radioactive elements out of acidic liquids. It is both reusable and scalable for different size applications.

With the Thor nano-filtration system, the test team was able to capture 40-60% of the REEs and radioactive elements in a five-minute, single pass-through from wet process phosphoric acid, and 80% of the REEs in a five-minute, single pass-through from sulphuric acid leached waste.

“The successful test projects proved that the Thor nano-filtration technology could be a game-changer for US production of its own rare earth elements supply,” said Brian J Andrew, CEO of Precision Periodic.

“The phosphoric acid contains 150ppm of total rare earths. Based on our extraction capabilities, we could extract 75 grammes of total rare earths out of every 1,000 litres of phosphoric acid from a phosphate mine.

For the rest of this article: https://www.miningmagazine.com/operational-excellence/news/1368442/rare-earths-filtered-from-phosphate-mine-waste

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