Unlock instant, AI-driven research and patent intelligence for your innovation.

Repairing method for hot blast outlet of hot blast stove

A technology of hot air outlet and repair method, applied in furnaces, blast furnaces, heating furnaces, etc., can solve the problems of long time consumption, influence of air supply temperature, and high temperature of tube shell

Active Publication Date: 2021-11-30
CHONGQING IRON & STEEL CO LTD
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The hot air outlet of the top-fired hot blast stove is prone to excessive temperature of the shell, which threatens safe production. The repair method is to stop the furnace and repair it after the furnace is cooled. It takes a long time, usually about 30 days, and has a great impact on the production of the hot blast stove. , big loss
[0003] Other repair solutions for the hot air outlet of the top-fired hot blast stove are simple digging and repairing. This method cannot cure the root cause, and it is prone to repeated high-temperature redness, bursting and development. The more the bag is carried, the controllability is poor, and the air supply temperature is long. The period is affected, and safe production cannot be guaranteed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Repairing method for hot blast outlet of hot blast stove
  • Repairing method for hot blast outlet of hot blast stove

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The embodiment of the present application provides a method for repairing the hot blast outlet of the hot blast stove, which includes the following steps:

[0063] 1. Create a negative pressure environment

[0064] The manway door at the bottom of the hot blast stove 10 is provided with an induced draft fan, the induced draft fan is opened to form a negative pressure in the hot blast stove 10, and the air volume of the induced draft fan is controlled, so that the temperature of the hot blast outlet 11 of the hot blast stove 10 is lower than what the staff can bear temperature, and the vault temperature of the hot blast furnace 10 is higher than the phase transition temperature of the silica brick.

[0065] 2. Install the inner steel mold

[0066] Outside the hot blast stove 10, first pass one end of the supporting column 220 through the middle part of the bottom plate of the casting mold 210, and weld the middle part to the bottom plate, then take the reinforced steel ...

Embodiment 2

[0074] The embodiment of the present application provides a method for repairing the hot blast outlet of the hot blast stove, which includes the following steps:

[0075] 1. Create a negative pressure environment

[0076] The manway door at the bottom of the hot blast stove 10 is provided with an induced draft fan, the induced draft fan is opened to form a negative pressure in the hot blast stove 10, and the air volume of the induced draft fan is controlled, so that the temperature of the hot blast outlet 11 of the hot blast stove 10 is lower than what the staff can bear temperature, and the vault temperature of the hot blast furnace 10 is higher than the phase transition temperature of the silica brick.

[0077] 2. Install the inner steel mold

[0078] Outside the hot blast stove 10, first pass one end of the supporting column 220 through the middle part of the bottom plate of the casting mold 210, and weld the middle part to the bottom plate, then take the reinforced steel ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a repairing method for a hot blast outlet of a hot blast stove and belongs to the technical field of hot blast stove maintenance. The repairing method for the hot blast outlet of the hot blast stove comprises the steps that an induced draft fan is arranged on a manhole door on the lower portion of the hot blast stove to enable the interior of the hot blast stove to be in negative pressure, part or all of an upper half round pipe shell of the hot blast outlet of the hot blast stove is taken down, brittle bricks are removed, a gap is formed, a pouring mold is installed in the gap, a first sealing shell is installed on the upper side of the pouring mold, and a high-temperature-resistant material is poured into the pouring mold. According to the repairing method for the hot blast outlet of the hot blast stove, the to-be-repaired position of the hot blast outlet of the hot blast stove can be thoroughly repaired, and the repeated risk is avoided. The time consumed by the repairing method is short, repairing can be generally completed within 4-5 days, and the influence on blast furnace production is small.

Description

technical field [0001] The present application relates to the technical field of hot blast stove maintenance, and in particular, relates to a method for repairing a hot blast outlet of a hot blast stove. Background technique [0002] The hot air outlet of the top-fired hot blast stove is prone to excessive temperature of the shell, which threatens safe production. The repair method is to stop the furnace and repair it after the furnace is cooled. It takes a long time, usually about 30 days, and has a great impact on the production of the hot blast stove. , a big loss. [0003] Other repair solutions for the hot air outlet of the top-fired hot blast stove are simple digging and repairing. This method cannot cure the root cause, and it is prone to repeated high-temperature redness, bursting and development. The more the bag is carried, the controllability is poor, and the air supply temperature is long. The times are affected, and safe production cannot be guaranteed. Conte...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C21B9/10
CPCC21B9/10
Inventor 王伟兰洪刘晶波杨林孙铭
Owner CHONGQING IRON & STEEL CO LTD