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Sovereign achieves notable graphite purification results from Malawi project

10th March 2025

By: Tasneem Bulbulia

Deputy Editor Online

     

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ASX- and Aim-listed Sovereign Metals has achieved “outstanding” results from purification testing of coarse flake graphite concentrate from its Kasiya rutile/graphite project, in Malawi, for applications requiring a higher-grade product, such as powder metallurgy, isostatically-pressed refractory products and high-grade expandables.

These applications typically require less than 1% ash in coarse flake graphite, that is, a loss of ignition (LoI) purity of more than 99%.

Sovereign engaged ProGraphite to conduct the testwork using coarse (>180-micron) flake graphite from Kasiya and to investigate acid and alkaline purification alternatives under conditions typically used to achieve the greater-than-99% LoI target.

Purification of Kasiya coarse flake achieved 99.95% LoI purity using acid purification and 99.98% LoI purity using alkaline purification.

“These are truly outstanding results – effectively achieving battery-grade purities of +99% and less than 0.05% ash under conditions that typically result in under 1% ash.

“For our future customers, this has the potential to significantly reduce reagent consumption and waste generation in the production of high-purity flake or targeted high-end applications,” CEO and MD Frank Eagar says.

This is yet further confirmation that Kasiya graphite concentrate is a premium graphite suitable for the anode, refractory, expandables and now also the high-purity powder metallurgy markets.

“We are delighted with the significant commercial optionality it brings to the Kasiya rutile and graphite project,” he adds. 

Edited by Chanel de Bruyn
Creamer Media Senior Deputy Editor Online

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