The invention discloses a method for installing a
blast furnace single-tube downcomer, characterized by using single
machine and double shackles to lift each lifting unit. The method comprises the following steps: 1, conducting lifting preparation: 1) dividing lifting units; 2) determining the barycenter of each lifting unit; 3) determining the lifting point and
shackle position of each lifting unit and completing the
welding of the shackles; 4) determining the position lines of a riser tube and an upper shaking head, and determining the position lines of a gravity deduster shell and a lower T-joint; and 5) building a joint
temporary operation platform the inner side and the outer side of the joint of each lifting unit; and 2, conducting lifting operation. According to the invention, by using single
machine to lift, the amount of large-scale machines is reduced, the limitation of narrow and small construction place can be overcome, the construction cost and
energy consumption can be reduced, the construction safety is raised, the target of realizing safety, high quality, high efficiency, energy saving, and low carbon is realized, and the situation of
high energy consumption, high cost and high
pollution existing in traditional double-
machine lifting is thoroughly changed.