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INFLUENCE OF FLUIDITY, HYDRODYNAMIC CHARACTERISTICS, AND SOLVENT ACTION OF SLAG ON THE DESTRUCTION OF REFRACTORIES AT HIGH TEMPERATURE *
Author(s) -
Endell K.,
Fehling R.,
Kley R.
Publication year - 1939
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1939.tb19436.x
Subject(s) - slag (welding) , viscosity , metallurgy , melting point , materials science , refractory (planetary science) , solubility , thermodynamics , atmospheric temperature range , chemistry , mineralogy , composite material , physics
A bstract Two methods for determining viscosity in the range 0.1 to 10 5 c.g.s. units (poises) at temperatures up to 1650°C are described, and some results on slags and glasses are given. Attack on any given refractory at a given temperature increases markedly with the fluidity of the slag. Researches with hydrodynamic models show that the velocity of flow and film thickness depends more on the viscosity of the slag than on the angle of inclination of the path of flow. A new interpretation of the solvent action of slags on refractoriness, together with thermodynamic considerations and measurements of viscosity, permits a general mathematical treatment of the complicated changes occurring during slagging. Slag attack may be effectively lessened by choosing a refractory of low solubility and by cooling the wall to a temperature of less than 50°C above the melting point of the slag.