Separation and recovery of rare metals by using iron-and steelmaking processes

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It has been found from the V solubility in pig iron and the distribution ratio between BF slag and pig iron that V in iron ore moves to molten pig iron without carbide precipitation. V and Nb were easily contained in FeO-containing slag in the hot metal pretreatment and BOF process. V concentrated in calcium silicate and CaO-FeO-Al_2O_3 phases, Nb concentrated in CaO-FeO-Al_2O_3 phase, and P concentrated in calcium silicate phase during cooling of slag. Therefore, it was expected that the ore substitute including large amounts of V, Nb and P could be obtained by separating those mineral phases from the other slag phases.