The Act plus the natives necessitate that production be not only in Ontario but in proximity to the native communities.
I suggest that implies that the chromite smelter be close to the source of the ore. Partly from transportation costs. This also means easier for the natives to get jobs and a region of Ontario that is in dire need of development gets to be developed.
Cost wise, hydro rates are the major hold up. Oh Yeah, politicians also.

Noront sits a bit better in this aspect then Cliffs because they could ship their chromite ore out ( no strategic complications ) and still provide local jobs from it's nickel mine, which can and should be processed in N. Ontario.