轉爐添加錳礦融熔還原製程技術之開發

Development of Manganese Ore Smelting Reduction in Converter

王木樹(M.S. Wang) ； 王文賢(W.H. Wang) ； 張鴻昌(H.C. Chang) ； 劉永章(Y.C. Liu)

《鑛冶：中國鑛冶工程學會會刊》 51卷3期 (2007/09) Pp. 107-113

https://doi.org/10.30069/MM.200709_51(3).0010

摘要

傳統的轉爐添加錳礦進行所謂的少渣吹煉作業，鐵水均先經過脫矽脫磷作業，並限定用於吹煉中高碳高錳鋼，以提高錳礦的回收率。為了達到轉爐吹煉中高錳、高磷鋼（例如JAC3XX、50CS600、CA-4D等鋼種）降低生產成本之要求，中鋼公司煉鋼廠成功的開發以未脫矽脫磷鐵水在轉爐添加錳礦進行熔融還原吹煉製程，錳礦的回收率可達到33.7%，吹止［Mn］提高0.141%，吹止［P］亦隨著提高。添加錳礦吹煉的關鍵控制技術包括：（1）減少石灰添加量，（2）減少轉爐渣量，（3）提高吹止碳、錳、磷，（4）降低轉爐渣中T.Fe含量，（5）提高鋼液回收等。高價的錳鐵合金及磷鐵添加量因而得以減少，降低成本。

關鍵字

錳礦 ； 回收率 ； 熔融還原 ； 轉爐渣

並列摘要

For traditional steel making process, the less-slag-operation, which enhances the yield of manganese by adding manganese ore into BOF, is only feasible when producing some specific steel grades from desiliconized and dephosphorized hot metal. Recently, CSC has succeeded in developing an advanced smelting reduction process that uses of regular hot metal without desiliconization and dephosphorization. This new method increases manganese yield to 33.7% blowing-end [Mn] up to 0.141% and the blowing-end [P]. This report reveals the advantages of the key techniques of blowing by adding manganese ore: less lime addition, less slag, higher end point [C], [Mn], [P], less T.Fe in BOF slag, and higher liquid steel yield. These advantages keep the production cost down.

並列關鍵字

manganese ore ； yield ； smelting reduction ； BOF slag