阅读说明：本技术 一种焦炉整体停炉后再复产的炉体修复方法 (Furnace body repairing method for recycling coke oven after overall shutdown ) 是由 谭春华 王亮 谢明洪 王志宏 蔡云佟 马富强 谭德灯 于 2019-08-22 设计创作，主要内容包括：一种焦炉整体停炉后再复产的炉体修复方法,其特征在于包括以下步骤：a、焦炉蓄热室修复,b、焦炉斜道区修复,c、炭化室修复,d、炉顶修复。本发明的焦炉整体停炉后再复产的炉体修复方法具有炉体修复相对于把炉体全部拆除后修复方法的时间短,炉体修复相对于把炉体全部拆除后修复的方法费用少,大大增加了焦炉的生产时间,节约了社会耐火材料资源,炉体修复方法通过投产的效果检验达到了焦炉正常生产技术要求的优点。(A furnace body repairing method for the recovery of coke oven after the integral shutdown is characterized by comprising the following steps: a. repairing a coke oven regenerator, b, repairing a coke oven chute area, c, repairing a carbonization chamber, and d, repairing the oven top. The furnace body repairing method for the overall shutdown and re-production of the coke oven has the advantages that the time for repairing the furnace body is short compared with the time for repairing the furnace body after the furnace body is completely removed, the cost for repairing the furnace body is low compared with the cost for repairing the furnace body after the furnace body is completely removed, the production time of the coke oven is greatly increased, the social refractory material resources are saved, and the furnace body repairing method meets the technical requirements of the normal production of the coke oven through the effect inspection of commissioning.)

1. A furnace body repairing method for the recovery of coke oven after the integral shutdown is characterized by comprising the following steps:

a. Coke oven regenerator repair

Jointing the wall of the heat storage chamber, cleaning cracks of the wall of the heat storage chamber, removing attached fire mud and brick scraps, jointing the cracks of the wall by using a jointing knife, wherein the jointing is full and compact, and the jointing of each gap is in place;

b. coke oven chute section repair

Sealing the front surface of a coke oven chute, removing a coke baffle plate and a coke sliding plate, cleaning an original sealing heat-insulating layer to the surface of a brick, plugging a scattered asbestos rope, and pointing and sealing; plugging and cleaning a chute port;

c. Repair of carbonization chamber

Jointing all brick seams of the carbonization chamber, taking out the plug bricks, sealing the furnace shoulder seams, replacing bottom bricks of the carbonization chamber and patching the furnace wall;

d. Furnace roof repair

The demolition of the furnace top large pit brick comprises a pot brick, a clay brick and a heat preservation brick, the elevation masonry of the furnace top layer is measured before demolition, the masonry is controlled according to the elevation masonry, and a stay wire is used for masonry during masonry, so that a certain gradient is ensured from the furnace to two sides of the furnace top of the coke furnace.

2. The method for repairing the furnace body of the coke oven which is produced again after the coke oven is stopped integrally as claimed in claim 1, wherein cracks with a gap of more than or equal to 3mm in the wall body of the heat storage chamber are subjected to jointing treatment by using silicon phosphate fire clay, the ratio of phosphoric acid to water in the silicon phosphate fire clay is 15% -20%, and the stirred silicon phosphate fire clay is used on the same day.

3. The method for repairing the furnace body of the coke oven which is produced again after the coke oven is stopped integrally as claimed in claim 1, wherein all brick joints of the carbonization chamber comprise through cracks and non-through cracks.

4. The method for repairing a furnace body which is produced again after the coke oven is integrally stopped as claimed in claim 1, wherein the plug brick seat brick is subjected to pointing at the position with a gap.

5. The method for repairing the furnace body of the coke oven which is produced again after the whole coke oven is stopped is characterized in that the depth of the furnace shoulder seam is more than twice the diameter of the ceramic fiber rope, and silicon fire clay is used for filling between two fiber ropes.

6. The method for repairing a furnace body of a coke oven which is produced again after the coke oven is stopped integrally as claimed in claim 1, wherein before the bricks are replaced after the bricks are removed, the bottom of the carbonization chamber is cleaned, then the bottom of the carbonization chamber is grouted in batches by using silicon fire clay, the grouting amount is up to one liter each time, and the specific gravity of the silicon fire clay is about 1.5kg/cm 3.

7. the method for repairing the furnace body of the coke oven which is produced again after the whole coke oven is stopped as claimed in claim 1, wherein the furnace wall is dug and repaired to remove the damaged brickwork of the furnace wall, the bottom of the vertical flue is cleaned, and the old fire clay on the brickwork which is not removed is removed; rebuilding the demolished furnace wall cave, and building by using medium-temperature silicon fire clay; the masonry process requires full mortar and uniform mortar joints, and reverse staggering is forbidden.

Technical Field

The invention relates to a coke oven maintenance method, in particular to a furnace body repair method for the recovery of a coke oven after the integral shutdown.

Background

Coke is a necessary raw material for smelting steel. China has become the first producing, consuming and exporting countries of coke in the world. As a core device for producing coke, after a coke oven is built and put into operation, the coke oven is not stopped generally, and the coke oven is not stopped and scrapped until the coke oven can not be normally produced, which is mainly caused by the characteristics of a refractory material of the coke oven. The coke oven mainly comprises silica bricks, the temperature of the silica bricks is lower than 573 ℃, the crystal shape in the silica bricks is changed rapidly, cracks are generated, and the sealing performance of the coke oven is damaged seriously. The method of shutting down the coke oven after the whole production process of the coke oven is in a cold state, repairing the oven body again, then baking the oven and putting into production faces a series of technical and economic problems, and represents a technical bottleneck which is difficult to break through.

Therefore, the known method for repairing the furnace body of the coke oven by stopping the furnace and producing the coke oven again has various inconveniences and problems.

Disclosure of Invention

The invention aims to provide a furnace body repairing method for the overall shutdown and the subsequent production of a coke furnace, which has the advantages of short time, low cost and good effect.

In order to achieve the purpose, the technical solution of the invention is as follows:

A furnace body repairing method for the recovery of coke oven after the integral shutdown is characterized by comprising the following steps:

a. Coke oven regenerator repair

jointing the wall of the heat storage chamber, cleaning cracks of the wall of the heat storage chamber, removing attached fire mud and brick scraps, jointing the cracks of the wall by using a jointing knife, wherein the jointing is full and compact, and the jointing of each gap is in place;

b. coke oven chute section repair

Sealing the front surface of a coke oven chute, removing a coke baffle plate and a coke sliding plate, cleaning an original sealing heat-insulating layer to the surface of a brick, plugging a scattered asbestos rope, and pointing and sealing; plugging and cleaning a chute port;

c. Repair of carbonization chamber

Jointing all brick seams of the carbonization chamber, taking out the plug bricks, sealing the furnace shoulder seams, replacing bottom bricks of the carbonization chamber and patching the furnace wall;

d. Furnace roof repair

The demolition of the furnace top large pit brick comprises a pot brick, a clay brick and a heat preservation brick, the elevation masonry of the furnace top layer is measured before demolition, the masonry is controlled according to the elevation masonry, and a stay wire is used for masonry during masonry, so that a certain gradient is ensured from the furnace to two sides of the furnace top of the coke furnace.

the furnace body repairing method for the overall shutdown and the re-production of the coke oven can be further realized by adopting the following technical measures.

According to the method, cracks with the gaps larger than or equal to 3mm of the wall body of the regenerator are subjected to jointing treatment by using the silicon phosphate fire clay, the ratio of phosphoric acid to water in the silicon phosphate fire clay is 15% -20%, and the stirred silicon phosphate fire clay is used on the same day.

The method wherein all the brick joints of the carbonization chamber comprise through cracks and non-through cracks.

In the method, the seam of the brick of the plug brick seat is hooked.

The method wherein the furnace shoulder seam depth is greater than twice the ceramic fiber rope diameter, and silica fire clay is used to pack between two fiber ropes.

In the method, before the bricks at the bottom of the carbonization chamber are replaced after being detached, the bottom is cleaned, and then silicon fire clay is used for grouting the bottom of the carbonization chamber in batches, wherein one liter of silicon fire clay is grouted at most each time, and the specific gravity of the silicon fire clay is about 1.5kg/cm 3.

In the method, the brickwork damaged by the furnace wall is removed, the bottom of the vertical flue is cleaned, and old fire clay on the brickwork which is not removed is removed; rebuilding the demolished furnace wall cave, and building by using medium-temperature silicon fire clay; the masonry process requires full mortar and uniform mortar joints, and reverse staggering is forbidden.

By adopting the technical scheme, the furnace body repairing method for the overall shutdown and the re-production of the coke oven has the following advantages:

1. The time for repairing the furnace body is short compared with the time for repairing the furnace body after the furnace body is completely removed;

2. The cost of furnace body repair is low compared with the method of repairing the furnace body after the furnace body is completely removed, the production time of the coke oven is greatly increased, and the social refractory material resources are saved;

3. The furnace body repairing method meets the technical requirements of normal production of the coke oven through the inspection of the production effect.

Drawings

FIG. 1 is a schematic view of a furnace body repair part produced again after the overall shutdown of a coke oven according to an embodiment of the invention.

In the figure: 1 basic platform, 2 regenerative chambers, 3 inclined ways, 4 carbonization chambers and 5 furnace tops.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.