Search citation statements
Paper Sections
Citation Types
Year Published
Publication Types
Relationship
Authors
Journals
The object of research is the processes of vacuum treatment of liquid steel after its release from the steelmaking unit. The purpose of the work is to study the processes of degassing of liquid steel under vacuum and optimize the conditions for reducing the gas saturation of the metal. The research method is the use of a dynamic mathematical model, developed taking into account the provisions of process limitation by diffusion links of the metal - gas phase boundary transfer. Mathematical models of degassing of metal in ladles with argon purge have been developed, taking into account the distribution of gases from metal according to three articles - in CO bubbles, in argon bubbles and through the open surface of the metal. In all variants of change of technological parameters blocking of a considerable part of a surface of a section of a metal - gas phase by a stream of oxygen is observed. This is because oxygen flows are about an order of magnitude higher than hydrogen flows. At change of technological parameters there is a process of self-regulation of redistribution of streams of hydrogen and oxygen. This is primarily due to the large deviation of the reaction of CO formation from equilibrium. When replacing argon in the purge gas with nitrogen, the behavior of CO and hydrogen in the bubbles during vacuum treatment of the metal remains almost the same. The basis of the products of the decarburization reaction is CO. As oxygen is removed from the metal, the CO content in the purge gas bubbles decreases, and due to this, the hydrogen and nitrogen content increases. The content of CO and hydrogen in the bubbles of the purge gas does not depend on the ratio of argon and nitrogen in the vacuum treatment. The optimal ratio of the purge mixture can be changed depending on the grade of steel being smelted. Comparison of calculated and experimental data indicates a fairly high adequacy of the model in kind
The object of research is the processes of vacuum treatment of liquid steel after its release from the steelmaking unit. The purpose of the work is to study the processes of degassing of liquid steel under vacuum and optimize the conditions for reducing the gas saturation of the metal. The research method is the use of a dynamic mathematical model, developed taking into account the provisions of process limitation by diffusion links of the metal - gas phase boundary transfer. Mathematical models of degassing of metal in ladles with argon purge have been developed, taking into account the distribution of gases from metal according to three articles - in CO bubbles, in argon bubbles and through the open surface of the metal. In all variants of change of technological parameters blocking of a considerable part of a surface of a section of a metal - gas phase by a stream of oxygen is observed. This is because oxygen flows are about an order of magnitude higher than hydrogen flows. At change of technological parameters there is a process of self-regulation of redistribution of streams of hydrogen and oxygen. This is primarily due to the large deviation of the reaction of CO formation from equilibrium. When replacing argon in the purge gas with nitrogen, the behavior of CO and hydrogen in the bubbles during vacuum treatment of the metal remains almost the same. The basis of the products of the decarburization reaction is CO. As oxygen is removed from the metal, the CO content in the purge gas bubbles decreases, and due to this, the hydrogen and nitrogen content increases. The content of CO and hydrogen in the bubbles of the purge gas does not depend on the ratio of argon and nitrogen in the vacuum treatment. The optimal ratio of the purge mixture can be changed depending on the grade of steel being smelted. Comparison of calculated and experimental data indicates a fairly high adequacy of the model in kind
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.