低磷鐵水煉製技術之開發

Development of Refining Technique for Making Low-phosphorus Hot Metal

林巖騫(Y. C. Lin) ； 莊垂喧(C. S. Juang) ； 黃俊琳(J. L. Huang) ； 楊奇明(C. M. Young)

《鑛冶：中國鑛冶工程學會會刊》 39卷1期 (1995/03) Pp. 113-121

摘要

為量產低磷含量的高品質鋼種，中國鋼鐵公司已順利地運轉一套鐵水處理系統；在此設備設立之前，包括有實驗與理論的前置研究結果，已作為此系統設計的基礎。實驗結果顯示：脫矽後鐵水矽含量落在0.10%至0.15%之間，最有利於脫磷與同時之脫硫作用。又脫矽、脫磷時使用氧氣吹射，有很好的熱補償效果，可避免鐵水太大的降溫現象。另外，以理論解析計算而得之製程廢氣溫度，與實測值相近，已提供作為廢氣處理設備的設計之用。基於前述的研究，低磷鐵水之煉製技術已發展成功。鐵水脫磷前的平均矽含量約0.12%，處理後鐵水之磷、硫含量可降至0.015%以下。製程廢氣冷卻處理後，皆可降至110℃以下。又因加裝吹氧裝置，已能產製温度平均約1230℃的低矽、低磷含量鐵水，提供後續的轉爐順利煉製高附加價值鋼種。

並列摘要

To meet the mass-production demand of higher quality steel grades with lower phosphorus content, a system has been smoothly commissioned in China Steel Corp. Several preliminary investigations have been accomplished for the hot metal processing design of this system for hot metal processing. Laboratory results showed that silicon contents of hot metal in the range of 0.10% to 0.15% would be the optimum initial concentration for following simultaneous dephosphorization and desulfurization. The use of oxygen jet during treatment could prevent hot metal from tremendous temperature drop. The temperature of flue gas was theoretically calculated for the design of a dust collecting facility. The refining technique for making low-phosphorus hot metal has been successfully developed. Both the final phosphorus and sulfur contents of hot metal were lower than 0.015%. The temperature of flue gas after cooling was below 110℃. Hot metal with the temperatureat at about 1230℃ has been afforded steelmaking process to produce high value-added steel grades.