Installation method for quickly removing and replacing middle-section furnace casing of large blast furnace

Abstract

The invention relates to an installation method for quickly removing and replacing a middle-section furnace casing of a large blast furnace, belonging to the field of installation and construction of a metallurgical construction engineering metal structure. The invention provides a construction method for quickly removing and replacing the middle-section furnace casing after the installation of the entire blast furnace is finished, which comprises the following steps: dividing the furnace casing to be replaced into five sheets, manufacturing six temporary supports 1 before the replacement, and installing the six temporary supports 1 at three adjacent furnace casing sheets to be replaced (20, 21 and 22), wherein each furnace casing sheet to be replaced is provided two temporary supports 1; firstly replacing the first and the second furnace casing sheets (20 and 21), removing the two temporary supports 1 positioned at the first furnace casing sheet 20 after installation and fixation, and installing the two temporary supports 1 at a fourth furnace casing sheet 23 to be replaced, wherein the third and the fourth furnace casing sheets 22 and 23 are replaced simultaneously while the temporary supports are removed and installed; and replacing a fifth furnace casing sheet 24 without moving the temporary supports. The method does not destroy the overall stability of the structure, realizes the safe and reliable construction operation, has low material consumption for the temporary supports and ensures that the whole process can be finished in seven days, thereby achieving the effects of shortening the construction period and lowering the construction cost.

Description

[0001] Field [0002] The invention relates to an installation method for quickly dismantling and replacing a furnace shell in the middle section of a large-scale blast furnace, and belongs to the field of installation and construction of metal structures in metallurgical construction engineering. Background technique [0003] The manufacture and installation of large blast furnace shells is usually carried out by the factory in sections (or belts) and delivered to the construction site, and then assembled on site into one or more belts, and then installed from bottom to top. Because the steel plates used in the large-scale blast furnace shells are relatively thick and require high manufacturing techniques, it generally takes two months for each belt to be manufactured and transported to the site. Therefore, preliminary preparations for the production of the furnace shell must be carried out in advance. [0004] Xinjiang Bayi Steel Plant new 3# blast furnace (2500m 3 ) projec...

AI Technical Summary

Problems solved by technology

In this replacement method, the lifted upper part 14 with the furnace shell is in an unstable state. During the jacking process, the local stability of each support point must be ensured to prevent the overall overturning of the furnace shell and endanger the safety of the construction personnel. Therefore, the entire construction The operation process is very dangerous; and because of the heavy weight of the part of the furnace shell to be lifted, the designed amount of materials for the jacking support system for the entire ring is 37t, and it takes 15-20 days for the production and installation to carry out the jacking and replacement process. According to this method The construction takes two months to complete, so the construction period is long and the construction cost is high

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