ISSN 2594-5300
54rd Seminar on Steelmaking, Casting and Non-Ferrous Metallurgy — Vol. 54, Num. 54 (2025)
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Abstract
The calcium carbide alloy is composed by CaC2 and CaO, mainly. CaC2 is a reconized deoxidizer agent in the tapping and a desulfurizer agent in the pig iron. In this article, the calcium carbide was tested as desulfurizer agent in the stirring station and ladle furnace at the secondary refining in the steelmaking process. Tested heats prove that effective desulfurization only occurs after deoxidation of the steel. Therefore, it is recommended that additions to contemplate the purpose of desulfurization begin during steel tapping. The direct benefit of this practice is to consider aluminum strictly as an alloying element, reducing the inclusion level of this element for deoxidation.
THE CALCIUM CARBIDE ALLOY IS COMPOSED BY CAC2 AND CAO, MAINLY. CAC2 IS A RECONIZED DEOXIDIZER AGENT IN THE TAPPING AND A DESULFURIZER AGENT IN THE PIG IRON. IN THIS ARTICLE, THE CALCIUM CARBIDE WAS TESTED AS DESULFURIZER AGENT IN THE STIRRING STATION AND LADLE FURNACE AT THE SECONDARY REFINING IN THE STEELMAKING PROCESS. TESTED HEATS PROVE THAT EFFECTIVE DESULFURIZATION ONLY OCCURS AFTER DEOXIDATION OF THE STEEL. THEREFORE, IT IS RECOMMENDED THAT ADDITIONS TO CONTEMPLATE THE PURPOSE OF DESULFURIZATION BEGIN DURING STEEL TAPPING. THE DIRECT BENEFIT OF THIS PRACTICE IS TO CONSIDER ALUMINUM STRICTLY AS AN ALLOYING ELEMENT, REDUCING THE INCLUSION LEVEL OF THIS ELEMENT FOR DEOXIDATION.
Keywords
CaC2, Deoxidation, Desulfurization, Ladle Furnace, Stirring Station
CaC2, Deoxidation, Desulfurization, Ladle Furnace, Stirring Station
How to cite
Rodrigues, Ivan; Motta, Leonardo Silva; Breno Maia; Nascimento, Leandro Miranda.
THE CALCIUM CARBIDE IN SECONDARY STEELMAKING REFINING – LADLE FURNACE AND STIRRING STATION OF A BRAZILIAN STEELMAKING,
p. 382-390.
In: 54rd Seminar on Steelmaking, Casting and Non-Ferrous Metallurgy,
São Paulo, Brasil,
2025.
ISSN: 2594-5300, DOI 10.5151/2594-5300-42213
