Furnace lining gap repairing material and furnace lining gap repairing method

Abstract

The invention belongs to the field of furnace lining repairing, and particularly relates to a furnace lining gap repairing material and a furnace lining gap repairing method. The furnace lining gap repairing material provided by the invention comprises the following components: 25 to 40 wt% of inorganic fibers, 2 to 10 wt% of an expansion filler, 2 to 15 wt% of refractory powder, 10 to 20 wt% of abinding agent and 30 to 60 wt% of a solvent, wherein the inorganic fibers comprise one or more selected from the group consisting of glass fibers, rock wool fibers, aluminum silicate fibers, magnesium silicate fibers, calcium silicate fibers, zirconium-containing fibers and aluminum oxide fibers; and the expansion filler comprises one or more selected from the group consisting of expanded perlitepowder, expanded vermiculite powder, expanded kyanite powder and sillimanite powder. The composition of the furnace lining gap repairing material is optimally designed, and particularly, proper typesof the inorganic fibers and the expansion filler with proper usage amounts are matched and selected, so the repairing material has a very excellent furnace lining gap repairing effect, and effectively prolongs the service life of a furnace lining.

Description

technical field [0001] The invention belongs to the field of furnace lining repair, and in particular relates to a furnace lining gap repair material and a furnace lining gap repair method. Background technique [0002] Due to the high working temperature of the high-temperature furnace, an expansion joint of a certain width will be reserved on the furnace lining as a margin for thermal expansion and contraction of the lining material. In addition, due to the high operating temperature and harsh atmosphere of the high-temperature furnace, it is easy to cause irregular cracks in the furnace lining. Whether it is an expansion joint or a damaged crack, if it is not repaired, it will affect the temperature in the furnace, and at the same time, the temperature of the outer wall area corresponding to the lining gap will be too high, which will affect the service life of the high-temperature furnace. [0003] At present, there are two main repair schemes for furnace lining gaps: o...

AI Technical Summary

Problems solved by technology

In addition, due to the high operating temperature and harsh atmosphere of the high-temperature furnace, it is easy to cause irregular cracks in the furnace lining.

Regardless of whether it is an expansion joint or a damaged crack, if it is not repaired, it will affect the temperature in the furnace, and at the same time, the temperature of the outer wall of the furnace corresponding to the gap in the furnace lining will be too high, which will affect the service life of the high-temperature furnace

[0003] At present, there are two main repair schemes for furnace lining gaps: one is to use high-temperature-resistant paint or adhesive to plug the gaps, but because of its high rigidity and no elasticity after curing, it will shrink when the gaps shrink at high temperatures. Cause unnecessary damage to the furnace lining, thereby aggravating the damage of the furnace lining; the other is to use fiber blankets to plug the gaps. Although the fiber blankets have good elasticity, their strength is poor, and the fiber blankets are easy to be broken during the process of thermal shrinkage and cold expansion of the furnace lining gaps. blanket crushed

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