Optimization of 55t LD-60t LF-CC Process to Upgrade Cleanliness of Steel

The oxygen content in concasting billet has been controlled less than 20×10-⁶ in condition of non-vacuum treatment with 55 t LD-60 t LF melting flow sheet at Shijiazhuang Iron and Steel by the operation measures such as controlling LD blowing end-point carbon:low carbon steel 0.08%～0. 10%C;medium ca...

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Bibliographic Details
Published in:Teshugang
Main Authors: Cao Liguo, Wei Xueqing, Ding Xiuzhong, Zhao Hong
Format: Article
Language:Chinese
Published: Editorial Office of Special Steel 2006-02-01
Online Access:http://www.specialsteeljournal.com/thesisDetails?columnId=129768438&Fpath=home&index=0
Description
Summary:The oxygen content in concasting billet has been controlled less than 20×10-⁶ in condition of non-vacuum treatment with 55 t LD-60 t LF melting flow sheet at Shijiazhuang Iron and Steel by the operation measures such as controlling LD blowing end-point carbon:low carbon steel 0.08%～0. 10%C;medium carbon steel 0. 10%～0. 15%C and high carbon steel ≥0.20% C,strengthening pre-deoxidation at steel tapping of LD,controlling slag tapping rate up to 98%, controlling Als 0.020%～0.035% during LF refining,to ensure refining(FeO)≤0.5%,feeding CaSi wire,50~80 L/ min soft blowing argon time ≥7 min,protective casting in whole process,using high efficiency holding and absorbing slag agent,and constant casting operation
ISSN:1003-8620

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