Much of the "iron" is actually blast furnace slag, so would probably be shipped in open cars, such as small hoppers (watch the load limits!), ore cars, or GS gons. If shoveling it out isn't a problem, standard gons could be used.
I believe alumina is usually shipped in covered hoppers, but the main use for it in the Northwest is as aluminum ore. I didn't know it was used in cement making.
