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Anson Resources (ASX:ASN) is now waiting for impending Green River plant partner, POSCO Holdings, to dot their i’s and cross their t’s as the South Korean chemicalmaker tests two tonnes of brine from the lithium project for due diligence.
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POSCO agreed to construct a key demonstration plant at Anson’s Green River Lithium Project in Utah in late June, pending several administrative hurdles.
The biggest of these is now in POSCO’s court; Anson just recently – through subsidiary Blackstone Minerals – sent the South Korean chemicals company a bulk brine sample to be tested for “lithium extraction efficiency.”
POSCO is testing the brine samples to make sure it’s happy to come onboard.
Should the samples come out OK, the Korean chemicalmaker will then help build a scaled-up version of a pilot plant to “validate a new industrial process at a larger, commercially relevant scale” before starting full construction.
That plant will operate on a continuous basis to closely resemble the future commercial plant and will “generate significant quantities of lithium carbonate.”
POSCO’s verdict, HotCopper understands, is due by December 2025 at latest.
The bulk sample POSCO is testing includes iron-free brine produced by Anson’s unique chemical-free process developed in the U.S. in recent years.
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Anson has already successfully tested this process to reduce iron in the Green River brine before it was fed into the Koch DLE process plant; that key development milestone was completed back in November 2024.
POSCO would be a major partner; it’s easily one of the world’s biggest steelmakers.
Oz buyers liked the news; ASN has climbed +7.7% today, to 7cps.
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