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Sustainable development of steelmaking requires solving a number of  environmental problems. Economically feasible and environmentally friendly  recycling of slag wastes is of special concern. Research of the team  representing National Metallurgical Academy of Ukraine, Royal Institute of  Technology, Carnegie Mellon University and URS Corp revealed a possibility of  the controlled phase transformations in the liquid silicate melts followed by  formation of the magnetically susceptible compounds. This approach enables  selective recovery of metal values from slag. In this paper, the results  obtained and further research directions are discussed. A possibility to  exploit physical properties of the transition metals, typical for the  metallurgical slags (such as Fe, Mn, V and others), and corresponding  specific properties of their compounds, such as non-stoichiometry, mixed  valency, pseudomorphosis, thermodynamic stability etc, in production of  value-added materials from slag wastes is discussed. The results of the  studies of thermodynamics and kinetics of oxidation in slags followed by  phase transformation with binary, ternary and complex oxides under various  physicochemical conditions are discussed in the view of their application for  production of the materials with predefined physical properties.  Peculiarities of precipitation in slags with various basicities are analysed  and demonstrate capacity of the proposed approach in the production of the  material with a given structure and size - for example, nano-sized crystals  with structure of spinel. The approaches towards industrial realization of  the developed method are also discussed

A study on transformation of some transition metal oxides in molten steelmaking slag to magnetically susceptible compounds