Method for installing steel ring of bell-less top distributor of blast furnace

The invention discloses a blast furnace bell-less top distributing device steel ring installation method, which provides a furnace throat gas sealing cover and a distributing device steel ring, a flange plate is arranged above the furnace throat gas sealing cover, and the method comprises the following steps: step 100, placing the distributing device steel ring above the flange plate, and adjusting the position of the distributing device steel ring to enable the upper surface of the distributing device steel ring to be horizontal; an annular to-be-welded gap is formed between the distributor steel ring and the flange plate; and 200, at least two welding starting points are evenly selected on the annular gap to be welded, an operation area is formed between every two adjacent welding starting points, all the welding starting points are synchronously welded in the clockwise or anticlockwise direction, and welding seams in every two adjacent operation areas are connected. All the welding starting points are sync