鞍钢七号高炉的改建是在边拆除、边设计、边安装的情况下,多单位交叉立体施工中进行的,如果每个单项工程不能相互衔接,势必影响下一道工序的顺利进行。下降管的安装如果不能按期完成,则将影响管内衬耐火砖的砌筑,同时也影响高炉区域煤气管道的联合试漏。在这样的特定条件之下, The reconstruction of No. 7 BF at Anshan Iron and Steel Company was carried out in the case of dismantling, side designing, and side mounting in multi-unit intersecting three-dimensional construction. If each individual project cannot be connected with each other, it will inevitably affect the smooth progress of the next process. If the installation of the descending pipe cannot be completed on time, it will affect the masonry of the lined refractory bricks, and also affect the joint leakage of gas pipes in the blast furnace area. Under such specific conditions,