naa a22 4500 510772447 CHVBK 20180411083218.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1007/s11837-013-0742-9 doi (NATIONALLICENCE)springer-10.1007/s11837-013-0742-9 Application of Spectroscopic Analysis Techniques to the Determination of Slag Structures and Properties: Effect of Water Vapor on Slag Chemistry Relevant to a Novel Flash Ironmaking Technology [Elektronische Daten] [M. Mohassab-Ahmed, H. Sohn] Flash ironmaking technology is an ecofriendly process for producing iron from iron oxide concentrates via a flash reactor that uses gaseous fuels and reductants that reduce energy consumption and minimize greenhouse gas emissions. It has the potential to achieve steelmaking in a single, continuous process. The phase equilibria and chemistry of selected slag systems were investigated during the development of a novel flash ironmaking process. Among the proposed reductants and fuels are H2, natural gas, and coal gas. In different ironmaking processes, the molten bath (iron-slag bath) is expected to be at equilibrium with gas atmospheres of H2/H2O, CO/CO2/H2/H2O, and CO/CO2. The first two gas mixtures were used to represent the processes based on H2 or natural gas/coal gas, respectively, whereas the CO/CO2 mixture was used for a comparison. The slag composition of interest in this process was selected to resemble that of the blast furnace and is based on the CaO-MgO-SiO2-Al2O3-FeO-MnO-P2O5 system with CaO/SiO2 in the range 0.8-1.4. The temperature range was 1550-1650°C encompassing a wide range of expected ironmaking temperatures for the novel flash process. The oxygen partial pressure was maintained in the reducing range of 10−10-10−9atm in the three gas atmospheres. It was found that H2O dramatically affects the chemistry of the slag and strongly affects the phase equilibria in the slag as well as the equilibrium distribution of elements between slag and molten metal. The effects of water vapor on the chemistry of the slag as well as the equilibrium reactions involving the slag have been studied for the first time. TMS, 2013 Mohassab-Ahmed M. Department of Metallurgical Engineering, University of Utah, 84112, Salt Lake City, UT, USA aut Sohn H. Department of Metallurgical Engineering, University of Utah, 84112, Salt Lake City, UT, USA aut JOM Springer US; http://www.springer-ny.com 65/11(2013-11-01), 1559-1565 1047-4838 65:11<1559 2013 65 11837 https://doi.org/10.1007/s11837-013-0742-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11837-013-0742-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mohassab-Ahmed M. Department of Metallurgical Engineering, University of Utah, 84112, Salt Lake City, UT, USA aut NATIONALLICENCE 700 1- Sohn H. Department of Metallurgical Engineering, University of Utah, 84112, Salt Lake City, UT, USA aut NATIONALLICENCE 773 0- JOM Springer US; http://www.springer-ny.com 65/11(2013-11-01), 1559-1565 1047-4838 65:11<1559 2013 65 11837 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer