ok, I get the  message now, on going back to the process flow...

ok, I get the  message now, on going back to the process flow sheets in the PFS,   and thanks for the clarification as well - recovery in the subsequent refinery process, where the roasting process actually occurs,   and not to be confused with recovery, through grinding, crushing, magnetic separation  in the concentrator that produces the concentrate for input into the refinery.  Apologies, yep should have taken more notice when writing the first post, and going back to  the schematics in the PFS

Glad to be corrected.  By the looks of it I suspect you also work for AVL?????

So, the formula you are using in that slide, which needs to include a refinery recovery, is as follows:
:(tonnage x ore grade) * (concentrate grade/ore grade) * mass recovery * refinery recovery

So to redo, for my own clarity and to correct my earlier post:

1st Row: (1,000,000 *0.5%) * (1.2%/0.5%) * (60%) * (78%), which becomes
                 5000 * 2.4 * 60% * 78% = 5616 tonnes

2nd row:  (1,000,000 * 0.7%) * (2.2%/0.7%) *(10%) * (78%), which becomes
                 7000 * 3.1428571 * 10% * 78% = 1716 tonnes




On re-reading the PFS I guess the following  comment, after doing this exerciseand taking more notice of teh schematics,  stands out - page 12 of 90:
"A notable difference for the Gabanintha PFS flowsheet design to other similar global vanadium projects is that the average LOM vanadium ore grade to the concentrator (1.03% V2O5) is high relative to the concentrate grade (1.4% V2O5), thereby realising a high concentrate mass yield; possibly the highest of all current operations worldwide. Average vanadium yield to concentrate over the mine schedule is 79.8%. Average refinery recovery of V2O5 from concentrate is 80.4%, giving an overall average LOM recovery of 64.1%. The other unique features are the elevated base metals sulphides associated with the main titaniferous magnetite horizon."

I presume, the statement above indicates that AVL will seek to use as much of the fresh and transitional layers as possible where recovery is the greatest, which makes sense.  It either suggests you intend bypassing the oxidised sections as much as possible or are confident that you will be able to increase vanadium recoveries in the oxidised sections.

Thanks again and all IMO.  Certainly has helped me to focus here around the upcoming MET tests etc.
As to the offer of calling, I rarely ever call companies I invest in but I am thinking I should write some questions down and give the office a call in due course to get some clarity around certain aspects etc.

All IMO IMO IMO