最近 ,耗资 5 0 0亿日元的日本住友金属工业公司和歌山厂新炼钢车间已投产 ,这是该厂更新改造项目的最后一部分。这项总耗资达 80 0亿日元的改造项目还包括新建一台圆坯连铸机和无缝钢管轧机。新炼钢车间的投产 ,使和歌山厂成为世界上吹氧时间最短的炼钢车间 (只需9ｍｉｎ)。因 Recently, Japan’s Sumitomo Metal Industries Co., Ltd. and Wakayama Plant, a new steelmaking plant costing 50 billion yen, have been put into production, which is the last part of the plant’s renovation project. The total cost of 80 billion yen renovation project also includes the construction of a new round billet continuous casting machine and seamless steel pipe mill. The commissioning of the new steelmaking plant enabled Wakayama Plant to become the world’s steelmaking plant with the shortest blowing oxygen time (only 9min). because