This investigation reports on the use of a microporous insulation on the basis of calcium hexaluminate as an alternative to the fibrous insulation usually employed nowadays on submerged nozzles for continous casting. The new insulation offers advantages in submerged nozzle production owing to its greater suitability for process automation. The new insulation has also shown good results in practice due to its good heat insulating qualities and easy handling. These positive test results have now been confirmed in an industrial trial with more than 100 submerged nozzles. Compared to the fibrous alternative, thermal insulation is improved with the new insulation even with the same thickness. Following these positive results, microporous insulation is being applied to more and more submerged nozzles.
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