I suspect it is overly optimistic to expect established chromite mines and processors in S. Africa to go out of business due to an new Canadian Source.
Face it these people have a large quantity of chromite reserves they've paid for and their only cost is extracting and shipping for chromite or extracting processing into ferro chrome in paid for facilities and shipping. They are the one's who will dictate what the world price is for a long time to come.
At present about 80% of S. Africa's production is 'mothballed' as not economic to produce/ship OR insufficient world demand to support increased production. Current price is likely not economic to support Canadian production either but that will change for eveyone once things pickup and existing stocks disappear.
Nobody has produced any firm numbers on cost to produce/ship either Chromite (maybe enriched/concentrated) or FerroChrome in Canada nor the capital required to create infrastructure. Therefor nobody can say how competitive vs S.African production it would be.