This website says about graphite concentrate:
https://graphano.com/about-graphite/
Flake graphite can be found in metamorphic rocks and have a flake or flat particle form of various sizes. It is usually characterised as fine (-100 to +200 mesh), medium (-80 to +100 mesh), large (-48 to +80) or jumbo (+48 mesh) and can contain up to 90-97% carbon. Carbon concentration in flake graphite deposits ranges from about 2% to 40% Cg. After mining, flake graphite ore is usually beneficiated via froth flotation to extract flake graphite. The result is a concentrate with 80%–90% graphite content.Further, the following website states
https://inside.lgensol.com/en/2022/09/a-better-life-with-batteries-precursor/
What is a Battery Precursor?The precursor, in producing material A through a chemical process, is a material at immediately before the final step of becoming material A. A battery precursor is a material at the final step before becoming a cathode, or an ingredient from which a cathode is formed.I think we can conclude from this that Talga is referring to material that is already >80% pure. Thus, the referenced mining study would correspond to an anode output of more than about 350k tpa. Great stuff.
(20min delay)