ISSN 2594-5300
45º Seminário de Aciaria - Internacional — vol. 45, num.45 (2014)
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Abstract
Aim of the present work is to continue the theoretical evaluation of the slags of the fundamental system CaO-SiO2-CrOx-MgO (Ca-O-Cr-Si-Mg quinary system) at the temperature of 1,873 [K], with the help of a computational thermodynamic tool. Driving force for this and the previous research works is the understanding of chromium losses from the molten bath into the slag. Especially motivating is the presence of solid phases in the slag, since they may prevent refractory degradation and help in the production of foaming slags. Nevertheless, Cr-bearing solid phases can lead to Cr losses, being therefore detrimental. Determination of the states of thermodynamic equilibrium for this system using a slag with fixed composition as a start material were made using MgO amount as variable. Results show the impact of the MgO content on the equilibrium phases (molten metal, liquid slag, solids) and their composition for this system.
Aim of the present work is to continue the theoretical evaluation of the slags of the fundamental system CaO-SiO2-CrOx-MgO (Ca-O-Cr-Si-Mg quinary system) at the temperature of 1,873 [K], with the help of a computational thermodynamic tool. Driving force for this and the previous research works is the understanding of chromium losses from the molten bath into the slag. Especially motivating is the presence of solid phases in the slag, since they may prevent refractory degradation and help in the production of foaming slags. Nevertheless, Cr-bearing solid phases can lead to Cr losses, being therefore detrimental. Determination of the states of thermodynamic equilibrium for this system using a slag with fixed composition as a start material were made using MgO amount as variable. Results show the impact of the MgO content on the equilibrium phases (molten metal, liquid slag, solids) and their composition for this system.
Keywords
Slags; Ca-O-Si-Cr-Mg; Chromium losses; Computational thermodynamics
Slags; Ca-O-Si-Cr-Mg; Chromium losses; Computational thermodynamics
How to refer
Nestor Cezar Heck;
Julio Morales Pereira;
Antônio Cezar Faria Vilela.
THERMODYNAMIC EVALUATION OF THE SLAGS OF THE FeO-CaO-SiO2-CrOx-MgO SYSTEM AT 1,873 K
,
p. 2043-2050.
In: 45º Seminário de Aciaria - Internacional,
Porto Alegre - Brasil,
2014.
ISSN: 2594-5300
, DOI 10.5151/1982-9345-24251
