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Sigma “Green Tailings” stokes DSO debate

Posted on - 09 Jun 2023

Category - News & Views

Sigma Lithium’s (NASDAQ:SGML) disclosure that it had sent its first cargo of “Green Tailings” to Chinese partner Yahua has stoked the debate about the carbon impact of DSO material. Sigma alleges that its “Green Tailings” are chemical-free, but we note it still discloses Li2O contents of c.1%, in line with most DSO shipments of lithium-rich material. And the question is, given the fact that this is probably 20% of the lithium grade of concentrate, how green can that actually be? The carbon intensity for transport is five times greater and if Sigma is shipping that material from Brazil with its...

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Brazil debate DSO Green greenwashing Lithium SpodCon