Dry coke quenching furnace circular passage tilt channel regional patching material

A technology of ring channel and CDQ coke oven, which is applied in the field of repair materials in the chute area of ​​the CDQ coke oven ring channel, can solve the problems of insufficient thermal shock stability, no repair technical solution, peeling and damage of the chute area, etc., and achieve good Effect of volume stability, good thermal shock stability, and good flow properties

Inactive Publication Date: 2010-01-06
BEIJING RUIPU TONGCHUANG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 seriou...

Method used

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  • Dry coke quenching furnace circular passage tilt channel regional patching material

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Comparison scheme
Effect test

Embodiment 1

[0026] According to the process formula, take electric fused brown corundum with a particle size of 5-1 mm: 12 parts by weight; particle size less than 1 mm: 20 parts by weight; particle size below 200 mesh: 10 parts by weight, a total of 42 parts, mullite 10 parts by weight parts, silicon carbide 12 parts by weight, active α-Al 2 o 3 14 parts by weight of powder, 3 parts by weight of active silica micropowder, 10 parts by weight of silicon carbide powder particle size of 200 mesh, 2.7 parts by weight of silicon carbide superfine powder, 4 parts by weight of high-purity aluminate cement, high-efficiency composite dispersant ( 0.2 parts by weight of sodium tripolyphosphate and 0.1 parts by weight of FDN), 0.3 parts by weight, and 2 parts by weight of heat-resistant stainless steel fibers. Stir the above formula evenly with a mixer, add an appropriate amount of clean water, stir it into a slurry, pour it into a supported mold and pour it into shape, the repair material will aut...

Embodiment 2

[0028] According to the process formula, the particle size of fused brown corundum is 5-1mm: 15 parts by weight; the particle size is less than 1mm: 10 parts by weight, a total of 25 parts, 30 parts of mullite, 12 parts of silicon carbide, and 9.8 parts of active α-Al2O3 powder Parts by weight, active silica micropowder particle size is 5 parts by weight, silicon carbide 5 parts by weight; silicon carbide superfine powder particle size is -400 mesh, 5 parts by weight; high-purity aluminate cement 7 parts by weight; efficient composite dispersion 0.2 parts by weight of agent (composed of 0.1 parts by weight of sodium tripolyphosphate and 0.1 parts by weight of SM); 1 part by weight of heat-resistant stainless steel fiber. Stir the above formula evenly with a mixer, add an appropriate amount of clean water, stir it into a slurry, pour it into a supported mold and pour it into shape, the repair material will automatically level up, and measure various physical and chemical indicat...

Embodiment 3

[0030] According to the process formula, take fused brown corundum particle size 5-1mm: 10 parts by weight; particle size less than 1mm: 15 parts by weight; particle size less than 200 mesh: 5 parts by weight, a total of 30 parts, 25 parts by weight of mullite, carbonization 10 parts by weight of silicon, active α-Al 2 o 3 8 parts by weight of powder, 6 parts by weight of activated silica micropowder, 6.6 parts by weight of silicon carbide powder; the particle size of silicon carbide superfine powder is -325 mesh, 6 parts by weight; 5 parts by weight of high-purity aluminate cement; efficient composite dispersion agent (0.2 parts by weight of sodium tripolyphosphate and 0.2 parts by weight of SM composition) 0.4 parts by weight; heat-resistant stainless steel fiber 3 parts by weight. Stir the above formula evenly with a mixer, add an appropriate amount of clean water, stir it into a slurry, pour it into a supported mold and pour it into shape, the repair material will automat...

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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...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 李卫华吴春余赵丽树张宝会刘广礼
Owner BEIJING RUIPU TONGCHUANG TECH DEV
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