Simple-and-accurate-positioning blast furnace shell upside-down charging method

Abstract

The invention provides a blast furnace shell upside-down charging method. The method is especially suitable for modifying a blast furnace surrounded by a furnace frame, and can reduce the construction cost, accelerate the construction speed and accurately position a furnace zone. The blast furnace shell upside-down charging method comprises the following steps: sending an nth furnace zone into the furnace frame at an opening at one side of the lower portion of the furnace frame, lifting the nth furnace zone through the working of the upper portion of the furnace frame, aligning, and fixing the circumference of the nth furnace zone to the furnace frame; and sending an mth furnace zone into the furnace frame from the opening, lifting the mth furnace zone through working, aligning, and butt-welding the mth furnace zone to an (m+1)th furnace zone, wherein m=n-1, n-2, ..., 2,1, and n is a natural number; and when aligned, a cross curve drawing method is adopted to find the center of the blast furnace, a suspension line is drawn, and the error between the center of the furnace zone and the center of the blast furnace is determined through the circular motion of a long fine line and a short fine line around the suspension line according to the distances of eight outside labels to the outer ring of the furnace zone and a distance of one end of the short fine line away from the suspension line to the inner ring of the furnace zone.

Description

technical field [0001] The invention relates to a method for inverting a blast furnace shell in a furnace rack (blast furnace frame), in particular to a method for inverting a blast furnace shell with simple and accurate positioning. Background technique [0002] The blast furnace shell is sequentially composed of the first furnace zone, the second furnace zone and the nth furnace zone from bottom to top. When installing a blast furnace, the normal installation method is generally adopted, that is, the first furnace belt is installed first, then the second furnace belt is hoisted (lifted), and the second furnace belt and the first furnace belt are butt-welded, so that from bottom to top Install each furnace belt in turn. [0003] For the reconstruction of the old blast furnace, because the blast furnace is surrounded by the furnace rack (blast furnace frame), generally in order to save investment, the original old blast furnace frame is used to update the blast furnace or e...

AI Technical Summary

Problems solved by technology

Due to the limited driving height on the top of the blast furnace (the distance between the lower part of the driving car and the top of the hob is small), it is impossible to lift the furnace belt above the hob by driving and move it horizontally before putting it into the hob

Therefore it is not possible to dress

Images