Method for rapidly maintaining converter lining

A converter lining and rapid maintenance technology, which is applied in the manufacture of converters and the improvement of process efficiency, etc., can solve the problems of long repairing time, rapid and stable production, short service life of converter lining, poor erosion resistance and erosion resistance, etc. Furnace time, saving refilling materials and labor costs, low cost effect

Inactive Publication Date: 2015-06-03
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long refurbishment time has certain restrictions on the rapid and stable production of the converter; when the refurbishment is carried out, the density of the repairing material is low, the erosion resistance and erosion resistance are poor, which will result in a short service life of the converter lining and a faster erosion of the repairing material

Method used

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  • Method for rapidly maintaining converter lining
  • Method for rapidly maintaining converter lining

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: The specific steps of this rapid maintenance method are as follows.

[0026] The feeding side area of ​​repairing converter is 1m 2 damage. When the last furnace was smelted before repairing the furnace, the basicity of the slag was 3.7, the content of MgO was 11.21wt%, and the end temperature of blowing was 1665℃. tons (2% of the nominal ton), check that there is no steel left in the furnace; shake the converter mouth to the feeding side, add 1 ton of pre-prepared magnesia-carbon refractory bricks into the furnace, choose to use low speed to control the tilting of the converter, and slowly turn the converter Shake it up, shake it to about 55 degrees, repeat the movement twice in a small range, observe the magnesia-carbon refractory bricks in the furnace and stop tilting the converter. Stand still in this state for 10 minutes to check the effect of repairing the furnace. The mixture of magnesia-carbon refractory bricks and slag is better pasted at the re...

Embodiment 2

[0027] Embodiment 2: The specific steps of this rapid maintenance method are as follows.

[0028] The bottom area of ​​the repaired converter is 1m 2 damage. When the last furnace was smelted before repairing the furnace, the basicity of the slag was 3.9, the content of MgO was 12.61wt%, and the end temperature of blowing was 1671℃. tons (4% of the nominal ton), check that there is no steel left in the furnace; shake the converter mouth to the feeding side, add 1 ton of pre-prepared magnesia-carbon refractory bricks into the furnace, choose to use low speed to control the tilting of the converter, and slowly turn the converter Shake it up, shake it to about 0 degree position, repeat the movement 3 times back and forth in a small range, observe the magnesia-carbon refractory bricks in the furnace and stop tilting the converter. Stand in this state for 10 minutes to check the effect of repairing the furnace. The mixture of magnesia-carbon refractory bricks and slag has a good ...

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Abstract

The invention discloses a method for rapidly maintaining a converter lining. The method comprises the following steps of: remaining slag after tapping of converter, pouring magnesia-carbon refractory brick blocks in the converter, shaking the converter till the magnesia-carbon refractory brick blocks and remained slag in the converter are flatly spread at a repaired part of the converter lining, and standing so that the mixture of the magnesia-carbon refractory brick blocks and the remained slag are stuck to the repaired part of the converter lining. According to the method disclosed by the invention, the converter repairing time is effectively shortened; the disadvantage that the time for pouring materials to repair the converter and sintering is long is changed; the operability of the converter is increased; high-temperature converter slag is easy to burn thoroughly; furthermore, a part of clearances can be filled by the molten part of converter repairing bricks; the erosion resistance and the scouring resistance are increased; the material collapse phenomenon due to non-thorough burning and half-baking of a part of positions in the event of traditionally repairing can be effectively avoided; the labour safety coefficient of workers is increased; a part of converter repairing materials and the labour cost are saved; the converter repairing cost is effectively reduced; compared with the original depletion speed, the depletion speed of the converter lining after the method is implemented is reduced; and therefore, the method has the characteristics of being rapid in maintenance speed, high in efficiency and safety and low in cost.

Description

technical field [0001] The invention relates to a method for maintaining a converter, in particular to a method for quickly maintaining the lining of a converter. Background technique [0002] In the production of converter steelmaking, improving the service life of the furnace lining is of great significance to improving converter productivity, molten steel output, molten steel quality, reducing refractory consumption, and increasing economic benefits. [0003] In the process of converter steelmaking, due to the mechanical erosion of the furnace lining during the charging process and the erosion of high-temperature slag, different parts of the furnace lining will be damaged to varying degrees, so that the thickness of the furnace lining will be reduced. When the thickness of the furnace lining is reduced to a certain extent, the converter must be Shut down the furnace to replace all lining bricks. In order to maximize the utilization rate of the entire furnace lining and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/44
CPCY02P10/20
Inventor 温春普乔国平韩春良刘虹黄山房志琦
Owner HEBEI IRON AND STEEL
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