High-temperature resistant expansion joint for dry quenching

Abstract

The invention relates to the field of refractory materials, in particular to a high-temperature resistant expansion joint for dry quenching. The original castable structure of the high-temperature resistant expansion joint is changed to be a refractory brick masonry structure; clay bricks and high-alumina light bricks are piled up to form a refractory layer and a heat-preservation layer during piling up, a pouring condensation process is not required, the maintaining and replacement time of the refractory material of the expansion joint is shortened, and the construction period is greatly shortened; a vault is provided with a granule backfilling layer and a vault gap pressing layer, the vault gap pressing layer is filled with clay bricks to ensure the connecting strength, a vault refractory layer and the heat-preservation layer are regulated by backfilling granules when being heated and expanded, and the refractory layer and the heat-preservation layer of a side wall and an arch corner are regulated by a side wall labyrinth layer and an arch corner labyrinth layer when being heated and expanded, the fire resistance is ensured and the service life is prolonged.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a coke dry quenching high temperature resistant expansion joint. Background technique [0002] The CDQ process greatly improves the coke quality in chemical production and promotes the stable operation of the blast furnace. With the popularization of the CDQ process, the energy saving and emission reduction effect of CDQ in production is becoming more and more obvious. However, the CDQ production system needs to operate in a high temperature environment. The high temperature makes the refractory material and expansion joint structure easy to damage. At least one annual repair is performed every year. The annual repair mainly replaces the refractory material and repairs the refractory structure. At present, CDQ high-temperature expansion joints are mostly built with castables and sprayed with refractory layers. The above-mentioned structures generally have the phenomenon that t...

AI Technical Summary

Problems solved by technology

However, the coke CDQ production system needs to operate in a high temperature environment. The high temperature makes the refractory material and the expansion joint structure easy to damage. At least one annual repair is carried out every year. The annual repair mainly replaces the refractory material and repairs the refractory structure.

At present, CDQ high-temperature expansion joints are mostly built with castables and sprayed with refractory layers. The above-mentioned structures generally have the phenomenon that the refractory materials are easy to age and fall off, and the service life is short.

The falling off of the castable directly leads to the burn-through of the high-temperature expansion joint, which seriously affects the stable operation of the CDQ system

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