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Hot-state repair method of bottom refractory brick for coke furnace carbonization chamber

A carbonization chamber and refractory brick technology, which is applied in the direction of preventing/repairing the leakage of bricklaying, can solve the problems of increasing energy consumption, prolonging maintenance time, and damage to refractory bricks, saving the time required for cooling, prolonging the life of coke ovens, The effect of avoiding strain cracks

Inactive Publication Date: 2007-06-13
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Since the refractory bricks used in the carbonization chamber have special properties that are not resistant to rapid cooling and rapid heating, if the temperature of the carbonization chamber is lowered to below 400°C for repairs, the refractory bricks will be damaged due to excessive cooling speed or low temperature. The occurrence of strain cracks leads to the formation of new damage hazards, which shortens the service life of refractory bricks in the carbonization chamber, forming a vicious circle
[0004] 2. Cooling will lead to extended maintenance time, which reduces production efficiency. After the carbonization chamber is cooled and repaired, it needs to be heated up, which increases energy consumption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A hot-state repair method for refractory bricks at the bottom of the coke oven carbonization chamber, the steps are: 1. Select high-alumina bricks, whose physical and chemical indicators are: refractoriness 1800°C, load softening point 1400°C, apparent air void ratio 20%, Linear expansion rate +0.031%, bulk density 2700kg / m3, high-temperature volume stability 9 times; 2. Preheat high-alumina bricks in advance according to the maintenance time: first preheat to 300°C at a heating rate of 25°C / h, and then at 35°C ℃ / h heating rate preheated to 720 ℃; 3. Use 60 parts of 100% clay mortar and 80 parts of 60% phosphoric acid to prepare mud for masonry and grouting; 4. Clean the carbonization chamber: to be repaired After the coke has been pushed and the coke push rod is retracted, the residual coke at the bottom of the carbonization chamber is removed, and the old bricks at the bottom of the carbonization chamber that need to be replaced are removed and repaired, and the parts ...

Embodiment 2

[0017] A hot-state repair method for refractory bricks at the bottom of the coke oven carbonization chamber, the steps are: 1. Select high-alumina bricks, whose physical and chemical indicators are: refractoriness 1830°C, load softening point 1410°C, apparent air void ratio 19%, Linear expansion rate +0.031%, bulk density 2700kg / m3, high-temperature volume stability 9 times; 2. Preheat high-alumina bricks in advance according to the maintenance time: first preheat to 300°C at a heating rate of 25°C / h, and then at 40°C ℃ / h heating rate preheated to 780 ℃; 3. Use 60 parts of 100% clay mortar and 85 parts of 70% phosphoric acid to prepare mud for masonry and grouting; 4. Clean the carbonization chamber: to be repaired After the coke has been pushed and the coke push rod is retracted, the residual coke at the bottom of the carbonization chamber is removed, and the old bricks at the bottom of the carbonization chamber that need to be replaced are removed and repaired, and the parts ...

Embodiment 3

[0019] A hot-state repair method for refractory bricks at the bottom of the coke oven carbonization chamber, the steps are: 1. Select high-alumina bricks, whose physical and chemical indicators are: refractoriness 1800°C, load softening point 1400°C, apparent air void ratio 20%, Linear expansion rate +0.029%, bulk density 2685kg / m3, high-temperature volume stability 10 times; 2. Preheat high-alumina bricks in advance according to the maintenance time: first preheat to 300°C at a heating rate of 25°C / h, and then at 38°C ℃ / h heating rate preheated to 760 ℃; 3. Use 60 parts of 100% clay mortar and 55 parts of 75% phosphoric acid to prepare mud for masonry and grouting; 4. Clean the carbonization chamber: to be repaired After the coke has been pushed and the coke push rod is retracted, the residual coke at the bottom of the carbonization chamber is removed, and the old bricks at the bottom of the carbonization chamber that need to be replaced are removed and repaired, and the parts...

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Abstract

The invention discloses a heating repair method of the firebrick in bottom of the coke-oven charring room. The process includes: preparing the repair material, cleaning the charring room and repairing the masonry. The firebrick is selective and heated. The repairing pug is matched and kept the temperature after cleaning the charring room, last to repair the masonry above 800DEG C. The invention can avoid the firebrick crack to prolong the coke-oven life comparing to the cooling repair. The life of the repairing part can reach above 60 months by selecting the alumina brick, so it can save the cooling time and the energy.

Description

technical field [0001] The invention relates to a method for overhauling a coke oven, in particular to a method for repairing refractory bricks at the bottom of a carbonization chamber without cooling down. Background technique [0002] In actual coking production, the refractory bricks at the bottom of the carbonization chamber of the coke oven are often easily damaged due to factors such as coke pushing friction impact, masonry and repair defects. very important. In the prior art, the refractory brick at the bottom of the carbonization chamber is repaired by cooling the repair method. The advantage of this method is that it can reduce the labor intensity of the maintenance personnel to a certain extent, but its problems and defects are also obvious: [0003] 1. Since the refractory bricks used in the carbonization chamber have special properties that are not resistant to rapid cooling and rapid heating, if the temperature of the carbonization chamber is lowered to below 4...

Claims

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Application Information

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IPC IPC(8): C10B29/06
Inventor 杨天旺龙寿辉陈文军
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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