Composite repairing method for blast furnace swing slip nozzle

Abstract

The invention relates to a composite repairing method for a blast furnace swing slip nozzle. The method is used for repairing the swing slip nozzle with melting loss, and comprises the following steps of S1, determining a repairing opportunity: determining the opportunity that the swing slip nozzle needs to be repaired according to the initial thickness and iron flux of the bottom of the swing slip nozzle; S2, performing pouring repair operation: performing pouring repair operation on the bottom melting loss of the swing slip nozzle by using a pouring material to form a new pouring material; S3, performing periphery compaction repair operation: adopting a periphery compaction method, filling a gap between the new pouring material in the step S2 and an old material of the swing slip nozzle with a compaction repair material, and pressing an included angle; and S4, performing spraying and repairing: spraying and repairing the melting loss of the side wall of the swing slip nozzle through a spraying and repairing material, and forming a new spraying material. The service life of the swing slip nozzle can be effectively prolonged, the iron flux of the swing slip nozzle is improved, the use safety and durability of equipment are improved, and therefore the production cost is effectively reduced.

Description

technical field [0001] The invention relates to the field of blast furnace ironmaking, in particular to a composite repair method for a blast furnace swing nozzle. Background technique [0002] In the blast furnace ironmaking production process, the swing nozzle (also called "swing") is an essential and important equipment in the ironmaking process. The swing nozzle plays the role of distributing the molten iron, which distributes the molten iron to torpedoes at different positions Cans or ladles to ensure continuous operation of tapping. During the production process of the blast furnace, the bottom and side walls of the swing nozzle are prone to pit-shaped erosion to varying degrees due to the long-term direct erosion and melting of the molten iron, which limits the further increase in the amount of iron passing through. See figure 1 and figure 2 . Usually, when the amount of iron passing through reaches about 80,000 tons, uneven melting loss will appear in various par...

AI Technical Summary

Problems solved by technology

However, except for the bottom area, other areas of the swing did not meet the replacement standards, resulting in increased maintenance costs, waste of resources, and the potential for energy saving and emission reduction has not been fully tapped

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