Fluorine is widely employed in mold powders used in continuous casting of steels. Although fluorine is important in the melting behavior, slag infiltration and crystallization of the slag film, it provides some disadvantages. Fluorine reacts within the slag, producing substances, such as NaF and SiF, which, in turn, react with the water in the secondary cooling, forming HF. These compounds lead to severe machinery corrosion and risk for the plant's personnel health and environmental impact. Fluorine free mold powder for slab casting is under development as result of the partnership between Imerys Group and ArcelorMittal Tubarão. Regarding to this, alternative raw-materials to substitute F in the mold powders composition have been investigated. Researches have indicated B 2 O 3 as potential substitutes of fluorine from mold slags. The industrial trials, performed in the Brazilian steelworks, ArcelorMittal Tubarão, were accomplished aiming to analyze its behavior during continuous casting operation of low carbon steel grade. Technological parameters like: heat flux in the mold, quality of coils, Fluorine and Boron contents in secondary cooling water, steel Boron pickup , mould flux consumption, behavior of mold sticker detection, SEN wear, environmental impact and personnel health were monitored during continuous casting with the objective of evaluating the performance of mould powder and to provide information about its influence on the surface quality of the steel. The preliminary industrials trials of low carbon steel casting revealed a good surface quality and reduction in the SEN erosion, not impact of plant's personnel health and environmental.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.