This site makes use of cookies necessary for the operation and useful for the purposes described in the cookie policy. If you want to learn more, see the cookie policy. By closing this banner, scrolling this page, clicking on a link or continuing navigation in any other way, you consent to the use of cookies.
Basic bricks containing chromium based complex spinel are used in the nonferrous industry due to their corrosion resistance against fayalite-type slags. Objective of this work is to replace Cr3+ with Me4+ ions that form complex spinel. The incorporation of iron oxide in the MgO-Al2O3-Me4+O2 systems contributes to reactive sintering. The mixes contain 60 wt.% MgO similar to most basic refractories used in non-ferrous converters and thus called “magnesia-rich” compositions. The investigation shows that incorporation of nano-oxides reduces the temperature of spinel formation and activates both synthesis and sintering. Magnesia-rich compositions with Al2O3, Fe2O3, SnO2 and TiO2 containing less than 3 wt.% nano-oxides fired at 1450 °C for 3 hours have resulted in formation of complete spinel solid solution and less than 5% open porosity.
In this report, the trends in refractories technologies for iron and steel production at Nippon Steel Corporation in the last few decades are outlined. Amid dramatic changes in crude steel production accompanying increased ratios in higher quality of steel and sophisticated refining methods, in our refractory ceramics R&D Div., actual machines have been realized by practicing developed outcomes with technologies for every production process relating to: refractory material quality, furnace building or execution, reparation, diagnosis, demolition, and recycling. Thus, continuing reduction in the unit consumption of refractories has been steadily performed. Additionally, technical issues are reduced to further enhance and maintain our international competitiveness in refractories technologies.