Ann: Production Schedule guides to significant By-Product Volumes, page-68

@Sharpey I suppose the details will be in the FS or could be found and pondered upon by going back to the main byproducts from the data of the bench testing to see what the main derivative's were. As during bench testing a lot of the studies were on Lepidolite from Alvarrose and Separation Rapids and Tantalum seams to be a by-product of note, producing an estimate of 20-25 tpa of Tantalite Con. Which Tantalum is refined from I believe. But I am no wizard to do the conversion on tantalite concentration to Tantalum like @sqe could. But from what I gather Tantalum pricing in 2018 #ref, the price was negotiated the starting price around $123.61 per kilo. The average price for Tantalum in 2018 was $151,800/t.
https://www.metalary.com/tantalum-price/

I am not sure if this was from Alvarrose or Separation Rapids or a combination of both ores. But I do know these metric's were projected for a P1 that could only produce a fraction of what the new P1 output would create.
But given the parameter's of scaling up the output to match current P1 spec's, on the back of an envelope the revised output could be between 37 - 46.5 tpa of Tantalite Con.


https://www.lepidico.com/wp-content/uploads/2018/02/LPD-180222-Corporate-Presentation-February-2018.pdf

February 2018
Key Parameter Key Metric
Lithium Carbonate (>99.5%) Production 3,000 tpa
SOP (>95% K2SO4) Production 3,000-4,000 tpa
Sodium Silicate (40wt% solution at SiO2:Na2O ratio of
2.0) Production 40,000-50,000 tpa
Caesium (as metal contained in formate) Production 10-100 tpa
Tantalite Con (30% Ta2O5) Production 20-25 tpa
-------------------------------------------------------------------------------------------------

Anyhow peeps DYOR