Steel ladle working lining brick and manufacturing method thereof

A working lining and ladle technology, applied in the field of refractory materials for ladles, can solve the problems of low service life, high thermal conductivity, thermal shock resistance, weak erosion resistance, etc., to achieve improved service life, excellent thermal shock resistance, The effect of long service life

Inactive Publication Date: 2013-03-20
WUHAN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal conductivity of the existing ladle prefabricated block is still relatively high, its thermal shock resistance and erosion resistance are still weak, and its service life is low, which cannot fully meet the requirements of ladle refining production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A ladle working lining brick and a preparation method thereof. The raw materials and mass percentages of the ladle lining brick are: 78-80wt% sintered corundum particles, 8-10wt% fused corundum fine powder, 4-6wt% α-Al 2 o 3 Micropowder, 6~7wt% MgO micropowder and SiO 2 A mixture of fine powders; the admixture is 0.11-0.13wt% of the raw material.

[0017] According to the mass percentage of the raw material and the addition amount of the admixture, the admixture and the MgO micropowder and the SiO 2 The mixture of fine powder is pre-mixed evenly, then add the remaining raw materials, mix evenly, add 3.5-4.5wt% water of the raw materials, stir for 0.5-1 minute, pour after ultrasonic treatment, vibrate molding, and the molded green body is at room temperature Curing under low temperature for 8-16 hours, and then heat preservation at 110-160°C for 24-36 hours to obtain the working lining brick of the ladle.

[0018] The ladle working lining brick prepared in Example 1 ...

Embodiment 2

[0020] A ladle working lining brick and a preparation method thereof. The raw materials and mass percentages of the ladle lining brick are: 81-84wt% fused corundum particles, 7-9wt% sintered corundum fine powder, 3-5wt% α-Al 2 o 3 Micropowder, 5~6wt% MgO micropowder and SiO 2 A mixture of fine powders; the admixture is 0.13-0.15 wt% of the raw material.

[0021] According to the mass percentage of the raw material and the addition amount of the admixture, the admixture and the MgO micropowder and the SiO 2 The mixture of fine powder is pre-mixed evenly, then add the remaining raw materials, mix evenly, add 4.5-5.5wt% water of the raw materials, stir for 0.5-1 minute, pour after ultrasonic treatment, vibrate molding, and the molded green body is at room temperature Curing under low temperature for 16-24 hours, and then heat preservation at 150-200°C for 12-24 hours to obtain the working lining brick of the ladle.

[0022] The ladle working lining brick prepared in Example 2...

Embodiment 3

[0024] A ladle working lining brick and a preparation method thereof. The raw materials and mass percentages of the ladle lining brick are: 84-86wt% sintered corundum particles, 6-8wt% fused corundum fine powder, 3-4wt% α-Al 2 o 3 Micropowder, 4~5wt% MgO micropowder and SiO 2 A mixture of fine powders; the admixture is 0.15-0.18wt% of the raw material.

[0025] According to the mass percentage of the raw material and the addition amount of the admixture, the admixture and the MgO micropowder and the SiO 2The mixture of fine powder is pre-mixed evenly, then add the remaining raw materials, mix evenly, add 5.5-6.5wt% water of the raw materials, stir for 0.5-1 minute, pour after ultrasonic treatment, vibrate molding, and the molded green body is at room temperature Curing under low temperature for 8-16 hours, and then heat preservation at 110-160°C for 24-36 hours to obtain the working lining brick of the ladle.

[0026] The ladle working lining brick prepared in Example 3 is...

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PUM

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Abstract

The invention relates to a steel ladle working lining brick and a manufacturing method thereof. The technical scheme of the steel ladle working brick is as follows: a mixture comprising 3-7wt% of MgO micro powder and SiO2 micro powder, 78-88wt% of adamantine spar granules, 6-10wt% of adamantine spar fine powder and 2-6wt% of alpha-Al2O3 micro powder are used as raw materials, and a mixture comprising 0.11-0.20wt% of lignin sulfonic acid calcium, metal Al powder, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and an azo-compound are used as additives. The manufacturing method comprises the following steps of: in accordance with the content of the raw materials and the addition amount of the additives, pre-mixing the additives and the mixture comprising MgO micro powder and SiO2 micro powder uniformly, adding other raw materials to be mixed uniformly, additionally adding 3.5-6.5wt% of water, stirring for 0.5-1 minute, pouring after ultrasonic treatment, carrying out vibration molding, curing the blank for 8-24 hours at the room temperature and preserving the temperature at 110-200 DEG C for 12-36 hours. The manufactured steel ladle working lining brick has small apertures in graded distribution, ensures thermal insulation property and thermal shock resistance of the material and has the advantages of good steel slag permeability resistance and long service life.

Description

technical field [0001] The invention belongs to the technical field of refractory materials for ladles. Specifically relates to a ladle working lining brick and a preparation method thereof. Background technique [0002] With the development of out-of-furnace refining and continuous casting technology, the ladle has gradually changed from a single-function molten steel container to an out-of-furnace molten steel refining equipment with complex functions. The prolongation of the residence time of molten steel in the ladle and the increase of tapping temperature make the working environment of the ladle more harsh. In order to adapt to changes in the working environment of ladles, alumina-magnesia carbon bricks and aluminum-rich spinel carbon bricks are generally used in domestic ladles. However, the ladle lined with aluminum-magnesium-carbon bricks and aluminum-rich spinel carbon bricks has high thermal conductivity, and the temperature of molten steel drops rapidly, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 黄奥顾华志杜博吴斌
Owner WUHAN UNIV OF SCI & TECH
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