Repair method for burnt-red and air-leakage part of pipeline

Abstract

The invention discloses a repair method for a burnt-red and air-leakage part of a pipeline. The repair method comprises the following repair steps: (1) determining the sizes of a metal border and a metal cover plate according to the size of a cutting hole at first, further forming an exhaust hole in the metal cover plate, arranging an exhaust tube on the exhaust hole, and arranging a valve on the exhaust tube; (2) producing the metal border and the metal cover plate, and then preparing a refractory castable and a heat-insulation fibre blanket; (3) cutting off the damaged pipe wall around the burnt-red and air-leakage part of the pipeline by a cutting knife; (4) welding the metal border to the outer side of the cutting hole, and then pouring the refractory castable into the metal border and compacting the refractory castable; and (5) covering the refractory castable with the heat-insulation fibre blanket, then hermetically welding the metal cover plate to the opening of the metal border, opening the valve on the exhaust tube to exhaust the remainder water in the refractory castable, and closing the valve after the exhaust is completed. The repair method is capable of rapidly, simply and conveniently, and reliably repairing the burnt-red and air-leakage part of the pipeline.

Description

technical field [0001] The invention relates to the field of blast furnace ironmaking, in particular to a method for repairing the red-hot and runaway places on the air supply pipe. Background technique [0002] Blast furnaces have higher and higher requirements for air temperature. After the air supply temperature becomes higher, it has a significant negative impact on the service life of pipeline equipment; After baking, the pipe wall on the outside of the pipe is prone to burning red and running wind, especially at the three-fork of the hot air pipe; at present, it takes too long and the cost is too high to replace the damaged pipe wall during maintenance. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a repairing method that can quickly, easily and reliably repair the red-hot and runaway parts of the pipeline. [0004] In order to solve the above problems, the technical solution adopted in the present inven...

AI Technical Summary

Problems solved by technology

[0002] Blast furnaces have higher and higher requirements for air temperature. After the air supply temperature becomes higher, it has a significant negative impact on the service life of pipeline equipment; After baking, the pipe wall on the outside of the pipe is prone to burning red and running wind, especially at the three-fork of the hot air pipe; at present, it takes too long and the cost is too high to replace the damaged pipe wall during maintenance

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