Furthermore, quantities required should vary, as 4N might be needed in hundreds of tons whereas a client may need only a few hundreds of kilos of 5.5N at, possibly 2-3-4 times the price of 4N, but in much less quantity. Maybe the lab will even be helpful here for small batches that would be cumbersome to fine tune in the HPA plant.

One clear recent statement is that the "basket" will be over $50,000/ton.

So we can almost trust a minimum revenue for 2013 (HPA only) of :

2 tpd (median of 1 tpd and 3 tpd) x 350 d x $50,000 = $35M

We could also hope for a 1000 tons production at $70,000 basket price : $70M