Dry coke quenching furnace circular passage tilt channel regional patching material

Abstract

The invention relates to a dry coke quenching furnace circular passage tilt channel regional patching material, comprising 65wt% of aggregate part and 35wt% of substrate part; the formula is as follows: 5-42 parts of fused brown aluminium oxide, 10-30 parts of mullite, 5-13 parts of silicon carbide, 8-15 parts of active alpha-Al2O3 powder, 3-8 parts of active silicon dioxide micropowder, 5-11 parts of silicon carbide powder, 3-7 parts of silicon carbide ultrafine powder, 3-9 parts of high purity aluminate, 0.2-0.4 part of composite dispersant and 1-3 parts of heat resistance stainless steel fiber. The invention has the advantage that the optimization of grain composition of particles in the aggregate part and the substrate part and the use of the composite dispersant ensure that the self-flow patching material has good flowing property in the simple and fast way and the patching material has good workability.

Description

technical field [0001] The invention relates to a repairing material for the chute area of ​​the annular channel of the dry quenching coke oven. Background technique [0002] At present, the structure of most CDQ coke oven bodies in China is basically the same. The ring channel part is supported by dozens of support columns to support most of the weight of the furnace body. The interval between the support columns forms the air channel for gas circulation. The same problem: in the short period of time when the CDQ coke oven is opened, there are different degrees of spalling and damage in the chute area, and even bricks fall off, which seriously affects the normal operation of the CDQ coke oven. According to the working conditions of the chute area, its damage is mainly caused by the scour wear from top to bottom of the CDQ and the thermal stress caused by the huge temperature difference (200-1100°C). The refractory material used here is mullite-silicon carbide brick. Althou...

AI Technical Summary

Problems solved by technology

[0002] At present, the structure of most CDQ coke oven bodies in China is basically the same. The ring channel part is supported by dozens of support columns to support most of the weight of the furnace body. The interval between the support columns forms the air channel for gas circulation. The same problem: in the short period of time when the CDQ coke oven is opened, there are different degrees of spalling damage in the chute area, and even the phenomenon of brick falling, which seriously affects the normal operation of the CDQ coke oven

The refractory material used here is mullite-silicon carbide brick. Although this kind of brick itself has high strength, its thermal shock stability is not enough. Huge erosion wear and thermal shock damage

So far, there is still no good repairing technical solution for such defects of damage and falling bricks. The inventor has conducted careful research on this, and proposed a simple and fast maintenance plan and castable for the chute area.

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