Wettability between molten slag and dolomitic refractory

Abstract

In the current study, the wettability between molten slag and dolomitic refractory materials used in the ladle during steel refining was investigated. The contact angle between molten slag and dolomitic substrate decreased with increasing temperature. The slag with lower basicity spread on the substrate more easily and penetrated deeper into the substrate. The penetration depth of slag into the refractory increased with the extension of holding time. The CaO in the refractory dissolved into slag which was then saturated with CaO. The reaction between slag and substrate resulted in the formation of solid Ca3SiO5, which slowed down the further penetration of slag into the refractory.

Effect of Interfacial Reaction between CaO–BaO–Al2O3‐Based Mold Fluxes and High‐Mn–High‐Al Steels on Fundamental Properties and Lubrication of Mold Flux

“…The melting temperature (hemispherical height) was taken as the zero time for the wetting test. The contact angle was analyzed by drawing a tangent to the ellipse at the three‐phase contact point …”

Corrosion behavior of Monofrax K‐3 refractory in borosilicate‐based model low activity waste glass melts

“…In the previous studies, 30,39,51,52 it has been widely reported that the penetration of melt through the open pores and microcracks of the refractory material (as capillaries) enables the reaction between melt and refractory and the transport of reaction species/product, 9 triggering the corrosion process. The horizontal melt penetration depth (L) due to capillary action in pores and cracks of the refractory can be estimated using the following equation 30,53,54 :…”

Corrosion Tests for Refractory Materials Intended for the Steel Industry - A Review

“…where γ SV is the gas-solid surface tension, γ LV is the liquidgas surface tension, γ SL the liquid-solid surface tension, θ is the equilibrium contact angle. For refractories application the sessile drop test is used to follow the evolution of the contact angle as it can evolve with the temperature [12,[14][15][16][17] and composition [18][19][20][21][22][23][24].…”

“…On the other hand, the substrates are prepared either by cutting a small piece out of a refractory or by preparing the substrates directly at the good dimension by split casting or pressing and firing. To achieve a smooth surface, the top face of the substrate can be grind and the roughness of the sample can be determined before the experiment [15,21].…”