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A Method for Replacing Bottom Blowing Bricks of Converter

A converter bottom blowing and converter technology, which is applied in the field of metallurgy, can solve the problems that the bottom blowing seat brick of the converter cannot be replaced, and the bottom blowing point cannot be replaced multiple times.

Active Publication Date: 2021-07-09
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current bottom blowing rapid thermal replacement technology can only replace the embedded bottom blowing gun, and cannot replace the bottom blowing seat brick of the converter. As a result, the bottom blowing rapid thermal replacement can only be replaced once at the same position, and the same bottom blowing point cannot be realized. replacement

Method used

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  • A Method for Replacing Bottom Blowing Bricks of Converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for replacing the bottom blowing seat brick of a converter, comprising the steps of:

[0033] Step A, the converter is shut down and the furnace is cooled

[0034] The converter is shut down and cooled for 7 days. After the converter is shut down, the converter is parked vertically. The primary dedusting fan of the converter runs at high speed for 8 hours. Afterwards, the furnace mouth of the converter is moved forward to a horizontal position, and an axial flow fan is installed in front of the converter to blow air into the furnace. Speed ​​up the cooling of the furnace, use an infrared thermometer to measure the temperature in the furnace, and lower it to 37°C to replace the furnace base brick;

[0035] Step B. Determining the filling position of the converter bottom

[0036] Park the converter after the cooling furnace in step A vertically, release the oxygen lance high-pressure water and oxygen chain, lower the lance to zero, and pass the oxygen lance head...

Embodiment 2

[0046] A method for replacing the bottom blowing seat brick of a converter, comprising the steps of:

[0047] Step A, the converter is shut down and the furnace is cooled

[0048] The converter was shut down and cooled for 8 days. After the converter was shut down, the converter was parked vertically. The primary dedusting fan of the converter was operated at high speed for 9 hours. Then, the furnace mouth of the converter was moved forward to a horizontal position, and an axial flow fan was installed in front of the converter to blow air into the furnace. Speed ​​up the cooling of the furnace, use an infrared thermometer to measure the temperature in the furnace, and lower it to 40°C to replace the furnace base brick;

[0049] Step B. Determining the filling position of the converter bottom

[0050] Park the converter after the cooling furnace in step A vertically, release the oxygen lance high-pressure water and oxygen chain, lower the lance to zero, and pass the oxygen lan...

Embodiment 3

[0060] A method for replacing the bottom blowing seat brick of a converter, comprising the steps of:

[0061] Step A, the converter is shut down and the furnace is cooled

[0062] The converter is shut down and cooled for 10 days. After the converter is shut down, the converter is parked vertically. The primary dedusting fan of the converter runs at high speed for 10 hours. Then, the furnace mouth of the converter is moved forward to a horizontal position, and an axial flow fan is installed in front of the converter to blow air into the furnace. Speed ​​up the cooling of the furnace, use an infrared thermometer to measure the temperature in the furnace, and lower it to 42°C to replace the furnace base brick;

[0063] Step B. Determining the filling position of the converter bottom

[0064] Park the converter after the cooling furnace in step A vertically, release the oxygen lance high-pressure water and oxygen chain, lower the lance to zero, and pass the oxygen lance head cen...

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Abstract

The invention discloses a method for replacing the bottom blowing seat brick of a converter, which specifically comprises the following steps: stopping the furnace to cool the furnace, determining the digging position of the bottom of the converter, digging and repairing, installing a new bottom blowing seat brick of the converter, and maintaining the new bottom blowing seat brick of the converter , Heat replacement of bottom blowing components. By replacing the bottom blowing block of the converter, the present invention solves the problems of blockage of the bottom blowing components in the late stage of the converter operation and unusable problems after severe erosion, and realizes multiple quick change of bottom blowing and bottom blowing at the same bottom blowing point of the converter. The service life of the blowing components is synchronized with the furnace age of the single furnace operation of the converter, so as to ensure the bottom blowing of the whole furnace operation of the converter. And the seams after the bottom blowing and quick change did not appear redness and steel penetration.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to furnace type control of a converter and maintenance of a converter bottom blowing, in particular to a method for replacing a converter bottom blowing block. Background technique [0002] my country's converter bottom blowing technology has made great progress in recent decades, and the converter bottom blowing gas source has been N 2 、Ar 2 , O 2 , CO, CO 2 and other gas sources, and the bottom blowing gas supply components are also diversified. Through the improvement of the material, molding process, structure, and gas supply component protection bricks of the gas supply components, the converter bottom masonry process, re-blowing process and Maintenance system, thus greatly improving the life of the converter blowing system. [0003] The development process of converter bottom blowing technology is essentially the process of improvement and perfection of bottom blowing gas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/44
CPCC21C5/44Y02P10/20
Inventor 朱青德魏国立阮强王德勇胡绍岩张英嘉周正德茹作栋
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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