It could, but, you would need a train of salt hoppers (covered 2 or 3 bay). Searsport should be set up to load it. Then you need to deal with MM&A which is basically in limp mode, just hobling along at skeleton waiting for Fortress to come in. Try getting a switch crew more than twice a week at Searsport...Then you need Pan Am to take it as far as Worcester, 2 days from NMJ anyway. CSX will move it right along, couple days handling. Then of course NJ needs a way to unload it. Rinse and repeat a couple times anyway, its a big salt pile.
Possible but impractical.