Grade, page-52

Hi SparkyR To upscale 3 fold from the PFS figures would require either 1 very big autoclave or preferably 2 mid size claves, this would allow for continous output during scheduled and unscheduled shutdowns (claves come down every 3 months for descale , inspection for cracks in inner shell and feed/ discharge valve replacement for about 2 wks). This is the big cost the auxillary other parts of the plant whether they go Ion exchange or CCD's just means upsize to suit output, not a major Capex expense as design costs will not alter much , just everything gets a bit bigger. The SX decks will also get bigger but once again not a major cost upgrade , just add a few more cells.
The big thing that does change is sulphuric acid usage, this is what I am waiting for in the BFS and FEED (Front End Engineering Design) to see what is planned ,build a acid plant or secure supplies from somewhere. Between CLQ, AUZ and SDI with the small HPAL plant they are planning for scandium production at Nyngan the combined acid usage will be approx 700k to 800k tonnes. This is a huge amount of acid to secure supply from in our current market without building your own plant.