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

从V在生铁中的溶解度和高炉渣与生铁之间的分配比可以看出，铁矿石中的V在没有碳化物析出的情况下向生铁熔体迁移。在铁水前处理和转炉冶炼过程中，含FeO渣中容易含有V和Nb。在炉渣冷却过程中，V集中在硅酸钙和CaO-FeO-Al_2O_3相中，Nb集中在CaO-FeO-Al_2O_3相中，P集中在硅酸钙相中。因此，通过将这些矿物相与其他渣相分离，可以得到含有大量V、Nb、P的代矿产品。

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.