Influence of Electrode Argon-Hydrogen Co-Injection on Carbon Content in a Alternating Current Ladle Furnace

Abstract:

About 80 kg low carbon steel was refined in a multifunction ladle furnace (AC-LF) with alternating current supplying. The argon-hydrogen gas mixtures were injected into the electric arc zone through one hollow graphite electrode. The flow rate of the gas mixtures was 3 m³/h. Results of the tests and the calculation based on the plasma local equilibrium thermodynamics and metallurgical thermodynamics theories show that, when the argon-hydrogen gas mixtures are injected into the electric arc zone, the carburetion rate is 4.7×10^-6 per minute for the steel heated by conventional AC-LF, which is 1.26 and 1.51 times of the heats blown 90%Ar-10%H₂ and 80%Ar-20%H₂, respectively. The carburetion rate is reduced by 20% at least when argon-hydrogen gas mixtures are blown into the furnace. When H₂ content in the gas mixtures reached 20% from 0, the decarburization rate increased but the total reaction rate decreases by 1.59×10^-6 per minute.

• Periodical: Advanced Materials Research (Volumes 239-242)
• Pages: 2361-2364
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.239-242.2361
• Online since: May 2011
• Authors: Dong Ping Zhan, Hui Shu Zhang, Zhou Hua Jiang, Wei Gong, Zhao Ping Chen
• Keywords: Carbon Content, Gas Injection, Hydrogen, Ladle Furnace, Steelmaking

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