轉爐吹煉雙渣法造渣技術開發與應用

Development and Application of Double Slag Process in Basic Oxygen Furnace

張顧齡(K. L. Chang) ； 郭有益(Y. Y. Kuo) ； 周文賢(W. H. Chou) ； 黃溫杰(W. J. Hwang)

《鑛冶：中國鑛冶工程學會會刊》 58卷3期 (2014/09) Pp. 49-55

https://doi.org/10.30069/MM.201409_58(3).0005

摘要

產製各項高品級鋼種，鋼液中低磷含量要求日漸提高，轉爐操作的主要造渣脫磷能力面臨挑戰；另外如何有效提高生產效率與節省成本則為轉爐操作另一項考驗。本研究藉由對轉爐雙渣法技術的開發，衍生到應用於實際轉爐生產的實踐。應用到（1）促進轉爐早期渣化研究，透過石灰熔解與渣化機構的解析，用於製程改進成功吹煉出磷含量＜50ppm的低磷鋼種。節省轉爐操作成本方面則設計目標渣組成，對渣性與渣量控制確保脫磷能力，達到抑制鋼液過度氧化而損失。（2）建立脫矽造渣與排渣技術，透過改變造渣模式運用於中龍新高爐初期所產出高矽鐵水，減少原本應傾倒廢棄的鐵水。

關鍵字

雙渣法 ； 低磷鋼種 ； 高矽鐵水

並列摘要

The low phosphorus content requirement is essential for production of the high-grade steel. It is great challenge to effectively dephosphorize during BOF (Basic Oxygen Furnace) slagging operation and to improve production efficiency and cost savings. In this study, we developed a double slag process and applied in the steelmaking operation practices. The lime dissolving mechanism and slagging process were analyzed. The modified processes based on the analysis results are successful for production of [P] ＜50ppm low phosphorus steel. Desiliconization slagging and deslagging technology was used in the newborn single blast of Dragon Steel with high silicon hot metal. The benefits of the newly developed process include: (1) rapid slagging reaction improving dephosphorization efficiency during BOF initial blowing period; (2) successfully reducing the amount of waste dumping hot metal; and (3) significant cost savings of BOF operation.

並列關鍵字

Double slag method ； low phosphorus steel ； high silicon hot metal