A study on transformation of some transition metal oxides in molten steelmaking slag to magnetically susceptible compounds
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.
slag recycling oxidation magnetic susceptibility
Volodymyr SHATOKHA Anna SEMYKINA Jinichiro Nakano Seetharaman SRIDHAR Seshadri SEETHARAMAN
National Metallurgical Academy of Ukraine, 4 Gagarin av., Dnipropetrovsk 49600, Ukraine National Metallurgical Academy of Ukraine, 4 Gagarin av., Dnipropetrovsk 49600, Ukraine Division of URS Corp, P.O. Box 1959, Albany, OR 97321 USA Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA 15213 USA Division of Materials Process Science, Royal Institute of Technology, SE-100 44, Sweden
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-10
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）