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A method for filling casing bricks and seat bricks at the taphole of a converter

A filling method and tapping technology, which are applied in the field of metallurgy, can solve the problems of powdering of the lining seat bricks of the converter, inaccurate positioning of the tapping port, damage of the lining seat bricks, etc., so as to reduce the number of replacements, reduce labor intensity, The effect of improving safety performance

Active Publication Date: 2019-11-12
SHIJIAZHUANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are mainly problems in the following aspects: firstly, asbestos cloth and steel plate filling the taphole brick and the outside easily lead to inaccurate positioning of the taphole; The steel mouth bricks and the inner lining bricks are filled with spraying mud, which is easy to pulverize the inner lining bricks of the converter, resulting in damage to the inner lining bricks.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The method for filling the gap between the tap hole brick and the seat brick of the converter in this embodiment includes the process of filling the gap between the tap hole brick and the seat brick on the outside of the furnace lining and the filling process of the gap between the tap hole brick and the furnace lining seat brick on the inside of the furnace lining. Concrete process steps are as follows:

[0016] (1) The gap filling process between the taphole casing brick and the seat brick on the outside of the furnace lining: make the corundum material and refined oleic acid into a mud material in a ratio of 3.5:1, and the corundum material requirement: Al 2 o 3 : 80%, body density (110℃×24h): 2.9g / cm 3 , Normal temperature compressive strength (110℃×24h): 55MPa; fill the mud material into the gap between the casing brick and the seat brick at the tap hole of the converter on the slag dumping side, compact it, and sinter for 15 minutes using the residual temperature...

Embodiment 2

[0020] The method for filling the gap between the tap hole brick and the seat brick of the converter in this embodiment includes the process of filling the gap between the tap hole brick and the seat brick on the outside of the furnace lining and the filling process of the gap between the tap hole brick and the furnace lining seat brick on the inside of the furnace lining. Concrete process steps are as follows:

[0021] (1) The gap filling process between the taphole casing brick and the seat brick on the outside of the furnace lining: the corundum material and refined oleic acid are made into mud material in a ratio of 2.5:1, and the corundum material requirement: Al 2 o 3 : 85%, body density (110℃×24h): 3.5g / cm 3 , Normal temperature compressive strength (110℃×24h): 60MPa; fill the mud material into the gap between the casing brick and the seat brick at the tap hole of the converter on the slag dumping side, compact it, and sinter for 20 minutes using the residual temperatu...

Embodiment 3

[0025] The method for filling the gap between the tap hole brick and the seat brick of the converter in this embodiment includes the process of filling the gap between the tap hole brick and the seat brick on the outside of the furnace lining and the filling process of the gap between the tap hole brick and the furnace lining seat brick on the inside of the furnace lining. Concrete process steps are as follows:

[0026] (1) The gap filling process between the taphole casing brick and the seat brick on the outside of the furnace lining: make the corundum material and refined oleic acid in a ratio of 2.0:1 to make mud material, corundum material requirements: Al 2 o 3 : 90%, body density (110℃×24h): 3.2g / cm 3 , Compressive strength at room temperature (110°C×24h): 57MPa; Fill the mud into the gap between the casing brick and the seat brick at the tap hole of the converter on the slag dumping side, compact it, and sinter for 25 minutes using the residual temperature in the furna...

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Abstract

The invention discloses a method for filling a taphole casing brick and a seat brick of a converter. The method comprises the process of filling the gap between the taphole casing brick and the seat brick on the outer side of the furnace lining, and the tapping hole casing brick and the seat brick on the inner side of the furnace lining. Block gap filling process, the method is to firstly fill the gap between the tap hole casing brick on the outside of the furnace lining and the block block gap, then shake the direction of the tap hole to the tapping side, and carry out the tap hole casing on the inside of the furnace lining Gap filling process between bricks and furnace lining bricks. In the method of the present invention, formula mud is used to fill the outside to ensure that the tap hole does not shift and there are no gaps in the filling, and fine particles are used to fill the inside with high-efficiency self-flow heat compensation to ensure that the lining block is not easily damaged, and can effectively improve the service life of the tap hole and Effect. The safety performance of the method for filling casing bricks and seat bricks at the taphole of the converter in the present invention is improved, and the accident of steel leakage at the taphole is less likely to occur.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for filling casing bricks and seat bricks of a converter tapping hole. Background technique [0002] The converter taphole is the outlet where the molten steel in the converter enters the ladle furnace from the converter. Due to the high temperature, erosion and erosion of molten steel and slag in the converter, the tapping hole cannot be synchronized with the age of the furnace, and it needs to be replaced and repaired regularly. The quality of the tap hole affects the stability of production, the quality of molten steel, and even affects safety. There is a gap of about 4cm between the newly replaced taphole casing brick and the converter lining brick, which needs to be filled. The quality of gap filling between the taphole casing brick and the converter lining brick is related to the use effect and safety guarantee of the taphole. If the external fill...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/44
CPCC21C5/445
Inventor 杨韦华杨锋功刘勇容晨光李建业张红卫胡云生霍彦朋秦影华祺年
Owner SHIJIAZHUANG IRON & STEEL
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