Repairing method of coking chamber of coke oven by using silica bricks

A technology of carbonization chamber and silica bricks, which is applied in coke oven bricklaying operations, prevention/repair of bricklaying leakage, etc. It can solve problems such as high labor intensity, long repair period, and damage to silica bricks, and achieve the goal of reducing coke oven output Affect and overcome the effect of short service life

Active Publication Date: 2011-02-16
WUHU XINXING DUCTILE IRON PIPES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Silica bricks have to go through two processes of cooling and heating. During the cooling and heating process, the silicon bricks will be damaged due to crystal transformation;
[0005] 2. The process is complicated, the labor intensity is high, and the repair period is long, which affects the output and life of the coke oven

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The preparation before digging and mending described in the present invention mainly comprises:

[0047] 1. Preparation of silicon bricks or silicon carbide bricks, the size is the same as that of the damaged silicon bricks in the carbonization chamber, and the error meets the standard requirements;

[0048] 2. Aluminum silicate fiber felt, steel drill, hammer, cutting machine, heat insulation cage, heat insulation labor protection clothing, etc.;

[0049] 3. Fire clay prepared with high temperature binder;

[0050] 4. Daily tools for hot repair of coke oven.

Embodiment 2

[0052] The technical process of the digging method of the present invention is:

[0053] 1. After pushing the coke to be repaired and carbonizing the indoor coke, clean the coke at the head and tail of the furnace;

[0054] 2. Push the heat insulation cage into the carbonization chamber;

[0055] 3. The aluminum silicate fiber felt is 20mm thick, and the water glass is applied, and the silica brick wall surface is pasted, and the space on the upper part of the carbonization chamber that does not need to be repaired is kept warm;

[0056] 4. Use aluminum silicate fiber pads to insulate the bottom of the carbonization chamber;

[0057] 5. Clean up the wall tiles at the damaged part: clean out the brick groove at the damaged part, clean out the brick groove according to the whole brick, and adopt the method of adding support at the bottom of the top brick on the damaged surface;

[0058] In the traditional technology, silicon bricks or silicon carbide bricks are processed, and ...

Embodiment 3

[0063] The control of furnace temperature in the technological process of method for digging and mending of the present invention is:

[0064]Control the temperature of the silicon brick in the carbonization chamber above the high temperature crystal transformation temperature.

[0065] At the beginning of digging and mending, stop heating the fire path of the burner head of the combustion chamber, and other methods of heating and controlling the temperature of the fire path. The temperature of the wall surface of the carbonization chamber is above 300°C); intermittent heating is used: when the temperature continues to drop, intermittent heating and supplementary methods are used for heat preservation.

[0066] The temperature rise after digging and mending adopts the method of natural temperature rise first, that is, no heating is carried out. Heating starts when the temperature of the furnace head reaches 700°C, spraying maintenance starts when the temperature reaches 1000°C...

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PUM

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Abstract

The invention discloses a repairing method of a coking chamber of a coke oven by using silica bricks, comprising the following steps of: burning silica bricks or coking silica bricks according to the size of a coke oven silica brick; preparing the specific fireclay by adopting a coke oven hot-patch specific high-temperature binder, wherein added materials comprise high alumina powder and fireclay; manufacturing a thermal insulation material by adopting an aluminium silicate fiber felt with a certain thickness, evenly coating glass liquid on the aluminium silicate fiber felt and pasting the aluminium silicate fiber felt to a high-temperature silica brick wall surface for insulating; insulating heat by adopting an asbestos cloth as a fire curtain; manufacturing an insulating cage and squeezing the insulating cage into the coking chamber to form an insulating seal wall; and arranging buffer ovens with 1-2 holes on both sides of the coking chamber to be repaired and discontinuously heating burning chambers of both sides of the coking chamber to be repaired to control the temperature of the silica bricks. Due to the adoption of the technical scheme, the invention realizes oven wall restoration under a heat-state condition, greatly reduces the destroy to the coke oven silica bricks in a repairing process and the influence on coke over output and overcomes the defects of short use period, frequent repair, destroy of new oven wall bricks, and the like of the traditional repairing method.

Description

technical field [0001] The invention belongs to the technical field of metallurgical industrial production, and relates to a repair technology for a coke oven carbonization chamber, more specifically, the invention relates to a method for digging and repairing a silica brick coke oven carbonization chamber. Background technique [0002] With the increase of the service life of the coke oven, the wall of the coking chamber of the coke oven will be damaged to varying degrees due to various reasons. For mild damage, the brick surface can be repaired by gunning; if the damage is serious, if there are karst caves or deformation and falling off of silica bricks, the bricks in the damaged parts must be excavated and replaced with new bricks. The traditional method is to cool down and repair, that is, to cool down the carbonization chamber that needs to be repaired to the point where people can enter to dig out the repair. [0003] Disadvantages of cooling repair technology: [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B29/06C10B29/02
Inventor 李晓东王春海杨良才陈福海章发
Owner WUHU XINXING DUCTILE IRON PIPES
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