The Continuous Drying of Refractory Concrete

Jürgen Pötschke

45219 Essen/Germany


Volume 11, Issue 3, Pages 52 - 56


The aim of this paper is to help avoid a steam explosion during drying. Drying refractory occurs via the evaporation of water on the heated side and its drain on the cold side. With increasing temperature, the growing steam pressure pushes the water out to the cold end of the lining. If its discharge into the environment is disabled, it accumulates and is heated up so that a steam explosion may occur. Consequently, the removal of water is crucial for safe drying. The integral mean value of the temperature determines the thermal conditions in the pore space, which is why it is used for the calculation of the continuous drying.


drying, refractory concrete


[1] Junge, K.; Telljohann, U.: Trocknung von Ziegelrohlingen – Einfuss der Feuchteleitfähigkeit auf Schwindungsfortschritt und Trocknungsverlauf. ZI­ Jahrbuch (2005) 21ff. [2] Junge, K.; Tretau, A.: Energieaufwand zur Rohlingstrocknung in Kammertrocknern. ZI­Jahrbuch (2007) 25 ff [3] Grosswendt, I.: Modell zur Beschreibung der Trocknung von Feuerbetonen. Dr.­Ing. Diss. 9. Aug. (2007), RWTH­ Aachen [4] Akiyoshi, M.M.; et al.: Key properties for the optimization of refractory castable drying. Refractories Appl. and News 4 (2004) [9] 14–16 [5] Innocenti, M.D.M.; Miranda, M.F.S.; Cardoso, F.A.: Vaporization process and pressure bildup during the dewatering of dense refractory castables. J. Amer. Ceram. Soc. 86 (2003) 1500–1503 [6] Block, F.R.; et al.: Temperatur und Trocknungsüberwachung bei der Herstellung monolithischer Bauteile. Proc. 37. Int. Coll. Refractories, Aachen (1994) 210–217 [7] Schmitz, W.; et al.: Messtechnische Überwachung des Aufheizens und Trocknens der feuerfesten Zustellung. Proc. 38. Int. Coll. Refractories, Aachen (1995) 48–56 [8] Abe, H.: Drying mechanism of castable refractories. J. Techn. Ass. Refractories, Japan 23 (2003) [3] 164–170 [9] Abe, H.: The effect of permeability on the explosion of castables during drying. J. Techn. Ass. Refractories, Japan 24 (2004) [2] 115–119 [10] Carlslaw, H.S.; Jaeger, J.C.: Conduction of heat in solids. Oxford, 2nd ed. 1959 [11] Pötschke, J.: A novel model for drying refractory castables. refractories WORLDFORUM 2 (2010) [2] 99–106) [12] Pötschke, J.: Lebensdauer feuerfester Werkstoffe. Kap.11.3, 2nd ed., Essen 2017 [13] Gerthsen, C.; Meschede, D.: Physik. Berlin 2005 [14] Grunewald, J.: Vorl. “Bauphysik”, TU ­Dresden 2009 [15] Reid, R.G.; Prausnitz, J.M.; Poling, B.E.: The properties of gases and liquids. New York, NY, 1989, 208–209 [16] Junge, K.: Daten zur feuchten Luft­Trockungstechnik. ZI­ Jahrbuch (1996) 128–137 [17] Volmer, M.: Kinetik der Phasenbildung. Dresden 1939, 161 [18] Routschka, G.: Refractory Materials. 2nd ed, Essen 2004 [19] Granitzki, K.E.: Superalloys, melting technique and refractories (Lectures, personal messages, 3.4.2005)


Göller Verlag GmbH