Development of Ultra-Clean and Low-Cost Process for Galvanized Steel by Ladle Furnace

by Chi-Wei Tai, Chung-Yi Li, Tong-Fa Yeh

Publisher - China Steel Corporation, Taiwan

Category - Engineering & IT

The standard process of high quality galvanized steel (GI) was used to be slag modification & Rheinstahl Heraeus (RH) process in China Steel Corporation (CSC). However, cost and environment pollution resulted from dust and odor have always been the primary issues. Hence, CSC has developed Ladle Furnace (LF) slag modification process. It improves dust and odor problem by excellent dust collecting equipment, and molten steel temperature control by LF electrodes instead of the addition of alumina in RH top oxygen blowing with Kawasaki top oxygen blowing (KTB). The LF process is now successfully replacing part of the slag modification & RH process in CSC. It not only improved environmental pollution problems but also optimized the allocation of different steel refining equipment to produce galvanized steel with a low-cost and high quality process.

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