You welcome/ Regarding wet concentrate VS dried graphite, IMO 1...

You welcome/ Regarding wet concentrate VS dried graphite, IMO 1 tonne of wet concentrate should be able to produce almost 1 tonne of dried graphite. The difference in mass/weight between wet and dried graphite is just a small amount of water. If we assume the wet concentrate has 5% water (as additional weight content) then 1 tonne of wet concentrate should be able to produce 0.95 tonne of dried graphite. No idea how much water in a 1 tonne of graphite wet concentrate, however if we look at the twitter photos, I doubt it surpasses 5% - 10% content. The goal of drying is to have graphite with max 0.50% moisture (water content).

Hope that helped,