Possibilities to Evaluate the Value of the Marangoni Effect and of the Marangoni Number in Refining Steel-Slag/Inclusion Systems

Abstract

Starting from the impressive progress in studying the instabilities induced by capillary effects in systems of two immiscible fluids in chemistry, an analysis of factors in solutal Marangoni effect and Marangoni number is performed, regarding the liquid steel surface as a part of the interface in systems steel-slag/inclusion. Low alloyed, microalloyed and carbon steel are taken into consideration because of their closed behavior to liquid iron solutions. Computing relations of surface tension of solutions Fe-O-S and interface tension between the same solutions and Al2O3 inclusion, also of the diffusion coefficients of the solutes are proposed to be used in computind the contribution of solutal effects in Marangoni effect and Marangoni number.

Keywords

• Marangoni effect
• Marangoni number
• surface tension
• oxygen
• sulphur