Hot patching process for bottom brick of carbonization chamber of coke oven

A carbonization chamber and coke oven technology, which is applied in coke oven bricklaying operations, preventing/repairing the leakage of bricklaying, etc., can solve problems such as blocked repair work and bursting, and achieve the effect of avoiding bursting

Inactive Publication Date: 2010-08-18
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional repair process is to use the same type of silica bricks for repair, but just after putting the silica bricks into the 800-degree furnace for half an hour, they burst and the repair work is hindered

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The brick heat repair process at the bottom of the coke oven carbonization chamber is carried out according to the following steps:

[0017] (1) Lower the temperature of the repair furnace in advance to prolong the coking time. The coking time is extended to 32 hours. The target furnace temperature is 1120 °C on the machine side and 1180 °C on the coke side; the temperature of the furnace head is controlled at 950 °C, and the temperature of adjacent furnace numbers is lowered according to the maintenance time Extend the coking time, the coking time is extended to 26 hours;

[0018] (2) After the furnace number is repaired and the coke is pushed, the furnace temperature drops to 850°C, the furnace head temperature is controlled at 800°C, and the adjacent furnace number starts to keep warm at the same time;

[0019] (3) At the same time of cooling down, place an insulating brick retaining wall from the large cover of the furnace top in the direction of the coke side at a ...

Embodiment 2

[0025] The brick heat repair process at the bottom of the coke oven carbonization chamber is carried out according to the following steps:

[0026] (1) Lower the temperature of the repair furnace in advance to prolong the coking time. The coking time is extended to 32 hours. The target furnace temperature is 1120°C on the machine side and 1180°C on the coke side; Extend the coking time, the coking time is extended to 26 hours;

[0027] (2) After the furnace number is repaired and the coke is pushed, the furnace temperature drops to 880°C, the temperature of the furnace head is controlled at 830°C, and the adjacent furnace number starts to keep warm at the same time;

[0028] (3) At the same time of cooling down, place an insulating brick retaining wall from the large cover of the furnace top in the direction of the coke side at a distance of 1m from the inspection section to the coke side;

[0029] (4) When the temperature of the repair furnace is lowered to 840°C, the height...

Embodiment 3

[0034] The brick heat repair process at the bottom of the coke oven carbonization chamber is carried out according to the following steps:

[0035] (1) Lower the temperature of the repair furnace in advance to extend the coking time. The coking time is extended to 32 hours. The target furnace temperature is 1120°C on the machine side and 1180°C on the coke side; Maintenance time cooling prolongs the coking time, and the coking time is extended to 26 hours;

[0036] (2) After the furnace number is repaired and the coke is pushed, the furnace temperature drops to 900°C, the furnace head temperature is controlled at 850°C, and the adjacent furnace number starts to keep warm at the same time;

[0037] (3) At the same time of cooling down, place an insulating brick retaining wall from the large cover of the furnace top in the direction of the coke side at a distance of 1m from the inspection section to the coke side;

[0038] (4) When the temperature of the repair furnace is lower...

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Abstract

The invention belongs to the technical field of improvement on a refractory process for a coke oven body, and discloses a hot patching process for a bottom brick of a carbonization chamber of a coke oven. The process comprises the following steps: cooling the repaired oven in advance to reach a target oven temperature of 1,120 DEG C on the machine side and 1,180 DEG C on the coke side; controlling the temperature of an oven head to between 950 and 1,000 DEG C; after the coke is completely pushed to the repaired oven, cooling the oven temperature to between 850 and 900 DEG C, and controlling the temperature of the oven head to between 800 and 850 DEG C; when cooling, putting an insulating brick retaining wall in the coke side direction on the coke side 1m away a repair section from a large cover port of the oven top; when the repaired oven is cooled to between 800 and 850 DEG C, ensuring that the temperature of the wall is above 700 DEG C; cleaning the damaged surface; replacing a silicon brick by using a mullite high-aluminum clay brick; and arranging an oven door on the machine side, and opening the oven door on the machine side when the temperature is raised to 1,100 DEG C to observe the repair effect. The process can fully avoid the problem of cracking during repairing the brick, realizes the maintenance of coke oven production under an abnormal working condition, and prolongs the service life of the coke oven.

Description

technical field [0001] The invention belongs to the technical field of improving the refractory process of a coking furnace body, and in particular relates to a heat repair process for bricks at the bottom of a coke oven carbonization chamber. Background technique [0002] The bottom bricks of the coke oven carbonization chamber are designed to be built with clay bricks except for the two pieces at the head and the tail, and all of them are built with silica bricks in the middle. When a coke oven is transferred from cold masonry to normal production, this process design can fully meet the strength requirements of the coke oven, and the thermal properties of the silica bricks can also fully meet the production needs. However, when the bricks at the bottom of the coke oven carbonization chamber are reversed, technical problems arise in order to restore them. The originally designed silica brick material could not meet the needs of thermal repair, and the newly added silica br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B29/02C10B29/06
Inventor 杨桦徐兴福张如松
Owner NANJING IRON & STEEL CO LTD
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