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Aluminum-magnesium casting material for ladle liner and preparation method thereof

A castable and lining technology, applied in the field of aluminum-magnesium castables, can solve the problems of inability to accommodate thermal stress, easy to be corroded by slag, unreasonable ratio, etc., and achieve excellent slag resistance and thermal shock stability. performance, improve thermal shock stability, and improve the effect of slag resistance

Active Publication Date: 2014-07-02
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, in these ladle lining materials, due to the use of dense particles as aggregates, thermal stress cannot be well accommodated; and the matrix part has many internal pores and large pores due to factors such as unreasonable proportioning or sintering. , is more susceptible to slag erosion, therefore, the existing technology cannot well solve the contradiction between the slag erosion resistance and thermal shock stability of the ladle lining material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An aluminum-magnesium castable for ladle inner lining and a preparation method thereof. With 50~55wt% microporous corundum particles as aggregate, 10~15wt% corundum fine particles, 24~30wt% corundum fine powder, 3~5wt% magnesium oxide powder, 3~5wt% α-Al 2 o 3 Micropowder, 3~5wt% aluminum-silica gel powder as the base material, add 3~5wt% water accounting for the sum of aggregate and base material, stir evenly, vibrate and form, keep warm at 100~150°C for 12~36 hours, An aluminum-magnesium castable for ladle inner lining is prepared.

[0026] In this embodiment: the corundum fine particles are white corundum fine particles; the corundum fine powder is white corundum fine powder.

[0027] The aluminum-magnesium castable for ladle lining prepared in this example is tested: the bulk density is 2.7~2.8g / cm 3 The apparent porosity is 18~20%; the flexural strength after burning at 1500℃×3h is 14~16MPa; the compressive strength after burning at 1500℃×3h is 58~63MPa; 28~32%...

Embodiment 2

[0029] An aluminum-magnesium castable for ladle inner lining and a preparation method thereof. Except following base material, all the other are with embodiment 1:

[0030] In this embodiment: the corundum fine particles are tabular corundum fine particles; the corundum fine powder is tabular corundum fine powder.

[0031] The aluminum-magnesium castable for ladle lining prepared in this example is tested: the bulk density is 2.7~2.8g / cm 3 The apparent porosity is 18~21%; the flexural strength after burning at 1500℃×3h is 14~17MPa; the compressive strength after burning at 1500℃×3h is 55~65MPa; 28~33%; 1500 ℃ static crucible method slag resistance test erosion index 30~35%; permeability index 63~68%.

Embodiment 3

[0033] An aluminum-magnesium castable for ladle inner lining and a preparation method thereof. Except following base material, all the other are with embodiment 1:

[0034] In this embodiment: the corundum fine particles are a mixture of tabular corundum fine particles and white corundum fine particles; the corundum fine powder is a mixture of tabular corundum fine powder and white corundum fine powder.

[0035] The aluminum-magnesium castable for ladle lining prepared in this example is tested: the bulk density is 2.7~2.8g / cm 3 The apparent porosity is 19~21%; the flexural strength after burning at 1500℃×3h is 15~17MPa; the compressive strength after burning at 1500℃×3h is 56~62MPa; 29~33%; 1500 ℃ static crucible method slag resistance test erosion index 28~33%; permeability index 62~69%.

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Abstract

The invention relates to an aluminum-magnesium casting material for a ladle liner and a preparation method thereof. ACcording to the technical scheme, the method comprises the following steps: preparing 50-65wt% of microporous alumina particles serving as aggregate; preparing 10-15wt% of fine corundum particles, 15-30wt% of fine corundum powder, 2-8wt% of magnesium oxide powder, 2-8wt% of alpha-A12O3 powder and 2-8wt% of aluminum powder silica gel which are used as base materials; adding water which accounts for 3-10wt% of the sum of the aggregate and the base materials; evenly agitating, and molding in a vibrating manner; carrying out heat preservation at 100-150 DEG C for 12-36 hours, so as to prepare the aluminum-magnesium casting material for the ladle liner. The aluminum-magnesium casting material for the ladle liner prepared by the method has excellent slag resistance and thermal shock stability, and the service life of the aluminum-magnesium casting material for the ladle liner can be effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of aluminum-magnesium castables. In particular, it relates to an aluminum-magnesium castable for ladle inner lining and a preparation method thereof. Background technique [0002] According to research, 60% of the damage of ladle lining materials during use is caused by slag corrosion, 30% is caused by thermal spalling, and 10% is caused by mechanical erosion and other reasons. With the adoption of new technologies such as smelting, the use conditions of ladle lining materials are becoming increasingly harsh, and slag corrosion and thermal spalling exist at the same time, which seriously affects the service life of ladle lining materials and the final quality of products in service. It can be seen that it is of great significance to develop ladle lining materials with excellent slag corrosion resistance and thermal shock resistance. [0003] A large part of the slag corrosion of the ladle lining material i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 顾华志黄奥张美杰付绿平靳林文王广成
Owner WUHAN UNIV OF SCI & TECH
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