By producing the desired end product of lithium hydroxide during test work, the company has proved the scoping study flowsheet is viable.
Notably, the test work has identified multiple opportunities for process optimisation post-PFS meaning other processing options may be evaluated.
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Test work was able to confirm the recycling and successful re-use of potassium sulphate in the roasting and water leach process.
Notably, the recycle of potassium sulphate achieved during test work is higher than in the scoping study, thereby reducing reagent costs.
San José will utilise a mixture of potassium and sodium sulphate with a very high degree of recirculation, enabling the re-utilisation of the more costly potassium sulphate.
Next steps before PFS release
The finalisation of capital and operating costs can now occur and is expected within the next week, enabling Infinity to move forward towards completion and release of the PFS.
The PFS will build on the November 2018 scoping study that valued the lithium project at up to US1.017 billion.