9th ECCC European Continuous Casting Conference – ECCC 2017

Monolithic isostatically pressed ceramics for flow-control applications usually consist of 20-30wt% of carbon plus refractory components. The main role of the carbon is to create a thermal shock resistant microstructure in the ceramic body. One negative side effect is it’s relatively high thermal conductivity which can lead to temperature losses of the liquid metal on its transfer from ladle to tundish and from tundish to mould. The temperature loss of the liquid metal requires extra superheat to avoid unwanted solidification and clogging in submerged nozzles. To avoid these effects is key to cast highest quality steels. Some practical examples for ladle shroud and submerged entry nozzle applications with reduced heat transfer achieved by insulation layers manufactured into the refractory body are shown in this work. Measurements in the plant and simulations indicate a potential for energy savings and quality improvements in the steelmaking process.