Mesabi Chief Washing Plant Keewatin, MN Industrial ...
Oct 02, 2015· Constructed in 1929, the Mesabi Chief washing plant had an initial treatment capacity of roughly 400 tons of lowgrade ore per hour. The initial shipments of ore processed at the plant came chiefly from the newly electrified Mesabi Chief Mine ( Hain, "Iron Ore", in Iron Trade Review, January 2, 1930, pp. 35).Not all the ore coming from the Mesabi Chief was lowgrade ore, about half of the ...