Converter trunnion area furnace lining erosion part maintenance method and use method after maintenance

Abstract

The invention discloses a maintenance method for a converter trunnion area furnace lining erosion part and a use method after maintenance, and belongs to the technical field of converter condition maintenance processes. The maintenance method comprises the following steps: measuring the thickness of the converter lining at the charging side and the trunnion area of the converter, and determining the slag remaining amount of the converter and the using amount of slag repair bar scrap steel and fettling bricks; carrying out slag repair on the charging side furnace lining by using the slag repair bar scrap steel; performing tiling maintenance on the furnace lining at the eroded part of the trunnion area by using fettling bricks; and after tiling is finished, a magnesium gunning material is used for gunning the converter trunnion area furnace lining subjected to tiling maintenance. The use method of the maintained converter trunnion area furnace lining erosion part is that the first furnace adopts a full-amount molten iron or magnetic separation slag recycling smelting operation mode. The maintenance effect of the converter trunnion area converter lining erosion part can be enhanced, the service life of the converter lining is prolonged, and refractory material consumption and labor intensity are reduced.

Description

technical field [0001] The invention belongs to the technical field of converter furnace condition maintenance technology, and more specifically relates to a method for maintaining an eroded part of a furnace lining in a trunnion area of ​​a converter and a use method after maintenance, which can realize effective maintenance of the eroded part of a furnace lining in a trunnion area of ​​a converter. Background technique [0002] The service life of the converter lining is of great significance for improving production efficiency, increasing furnace life, improving molten steel quality, improving variety structure, reducing refractory consumption, and increasing economic benefits. The converter lining is mainly composed of insulation layer, permanent layer and working layer. During the smelting process, the converter lining is eroded by a series of strong mechanical, physical and chemical effects, especially the high temperature peroxidized slag has a greater erosion effect ...

AI Technical Summary

Problems solved by technology

[0006] In view of the existing technical problems such as difficulty in maintaining the eroded part of the lining in the trunnion area of ​​the converter, high frequency of gunning operations, high consumption of refractory materials, and poor maintenance effect, the purpose of the present invention is to provide a maintenance method for the eroded part of the lining in the trunnion area of ​​the converter and The method of use after maintenance can effectively enhance the maintenance effect of the eroded part of the lining of the converter trunnion area, improve the service life of the converter lining, and reduce the consumption of refractory materials and labor intensity

[0008] In order to solve the problem in the prior art that the patched furnace bricks are easy to fall off, thereby affecting the maintenance effect of the eroded part of the furnace lining in the trunnion area of ​​the converter, the technical solution adopted by the present invention is as follows:

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