RE: RE: Optimism at the extreme?? Well this is of course just my opinion but based on what I saw about 10 years ago when I had the opportunity to wander thru the mill, the mill buiding is` adequately sized to accommodate`a 500 tpd plant but no I am pretty sure the` existing mill would never be capabale of doing better than 120-150 ton per day.
You'd need to dramatically expand the ball mill capacity which means a new larger unit and install significantly larger flotation cells,. keep the existing one and maybe triple the number. These alone would be substantial , both in terms of $$ and required floor space but youd almostly certainly need a new larger crushing spread which I dont think could be done wiothout ripping out the existing units.
I dont know if the tailings lines would be large enough to handle the extra tonnage , so they might need upgrading as well..
I doubt that the main haulage drift on 800L would handle 500 tpd , so upgrading required there as well.
Straight answer to a straight question , but JMHO of course.