Lithium carbonate at a grade of 99.92% Li2CO3 was produced, which exceeds most published specifications for battery-grade quality.
Subsequently, a high purity battery-grade lithium hydroxide containing 56.5% lithium hydroxide (LiOH.H2O) was produced from the carbonate via the conventional hybrid route.
"These results very clearly demonstrate that, due to the coarse size and low impurity content of the concentrate, the Ewoyaa lithium project is a world-class asset and is a premium feedstock for converters around the world," said Noel O'Brien, Consulting Metallurgist to IronRidge in a statement.
And Vincent Mascolo, IronRidge Resources chief executive added: "We are very pleased to have achieved these conversion test work results which demonstrate the Ewoyaa project's ability to generate battery-grade lithium products from premium feedstock.
"These results are another significant milestone which underscore the commercial potential of the project, which also boasts exceptional logistics; adjacent multiple high-voltage power lines, sealed roads and lies within 110 kilometres of the operating deep seaport of Takoradi, all within a the pro-mining jurisdiction of Ghana".
A maiden resource estimate for Ewoyya is planned for the first quarter of 2020.