The cracking accident of a square entrance pipe for the TRT device of No.7 blast furnace of Anshan Iron & Steel Co.was presented,and the cause analysis and the solving methods were also described.

• 介绍了鞍钢7%23高炉TRT装置入口方管道爆裂事故经过,进行了原因分析,并提出了解决措施。