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1.8¢ brazilian critical minerals limited

Ann: New Discovery at Apui ENE REE Project with exceptional REE, page-44

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Midnight26

7,486 Posts.

2021

18/01/24

09:45

Post #: 71936751
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Originally posted by Midnight26: ↑

Promising process....

A glauconitic siltstone sample with a potash content of 10% is investigated as a potential potash source. The fine grain structure comprises potash bearing phases of glauconite, muscovite, and microcline. The as-received samples showed poor dissolution ~ 5%. Planetary ball milling was attempted for the dissociation of the underlying silicate structure for the potash release, and ~ 60% potash was obtained after 12-h milling. Mechanical activation (8 h, 60% NaOH) prior to heat treatment (600 °C, 30 min) was found successful in recovering more than 95% K values from glauconite. The final residue consists mainly of quartz, indicating a complete breakdown of the silicate matrix. The mechanical activation process followed is simple, adaptable, and less energy-intensive compared to existing methods.

https://link.springer.com/article/10.1007/s42461-020-00218-5

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Roasting to 600°C is costly but this is just one study and as I said, if companies are reporting glauconitic potash resources then they must have potential for economic extraction. Anyway bigger fish to fry for BCM in their PM and REE deposits.

BCM Price at posting: 2.5¢ Sentiment: Buy Disclosure: Held
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