Abstract
Iron sand of low phosphorus and high vanadium contents, produced in Nimai-bashi, Ohata-machi, Shimokita-gun, Awomori-ken, was taken as the original material. When. this material was refined by the direct steel-manufacturing processusing an electric arc furnace, the cost of curent for removing phosphorus was dispensed with, as it was unnecessary to do so. Further, the material having been high-vanadium iron sand, ordinary cheap carbon steel was not produced, but vanadium in iron sand was reduced and entered to the steel, so that high-grade vanadium steel was economically manufactured.
