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Rare earths filtered from phosphate mine waste

The date of: 2019-07-31
viewed: 6
source:www.miningmagazine.com

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.
'This equates to one Florida phosphate mine being able to produce 230 metric tonnes of total rare earths per year, which would supply an estimated 25% of the annual US Military needs.'
Florida Industrial and Phosphate Research Institute provided two different source liquids for the test projects. The first was the wet process phosphoric acid, which contained radioactive elements, and the second being a sulphuric acid leach liquid of the sludge waste. The Thor nano-filtration system captured 45-55% of the radioactive elements, which exceeded the goal to establish the waste as viable for other uses.
The REE filter is currently available for partnership projects.



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