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高炉约每15年就要进行一次大修,大型高炉采用传统施工方法大修工期大约需要130天。JFE钢铁公司开发了比传统施工方法工期减少一半的大件施工法(L arge B lock R ingConstruction M ethod),1998年千叶厂6号高炉大修创造了62天的世界最短工期记录,2005年福山厂5号高炉大修采用同一施工法又将记录缩短到58天。传统的施工法以10~20t为单位进行炉体拆除、安装,而大件施工法则以2000t的大件为单位进行炉体的拆除、安装,是一种全新的施工方法。
The blast furnace will undergo an overhaul every 15 years or so, and the overhaul period of a large blast furnace using the traditional construction method will take about 130 days. JFE Steel has developed Lager B lock R ing Construction M ethod, which has a construction period of less than half that of the traditional construction method. In 1998, Chiba Plant No. 6 blast furnace overhaul created the world’s 62-day record of the shortest construction period. In 2005, Fukuyama No. 5 blast furnace overhaul the same construction method and shorten the record to 58 days. The traditional method of construction to 10 ~ 20t for the removal of the furnace body, installation, and large construction method 2000t large units for the removal of the furnace body, installation, is a new construction method.