Ann: Testwork Realises Continued Outstanding Lithium Recoveries, page-11

From this:
"Flotation testwork repeatedly reached >95% lithium recovery to flotation concentrates at target Li-grades and mass yield"

From what I understand this part of process is the first one, the simple separation to get to concentrate, similiar to hardrock producers that first at mine site come to 6% spodumine concentrate and then they ship this concentrate to processing plant to get to final battery grade lithium.

That's why I'm asking what grade of lithium are they getting in their concentrate. Also in the report there is some hint to this:
"The flotation process and subsequent concentrate cleaning results in final concentration of clean zinnwaldite into 30% of the original flotation feed mass (at 95% lithium recovery)"

If the input has 1,5% lithium, then this first process will yield 5% lithium concentrate for further processing.