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Tundish cover castable and method for preparing tundish cover by using same

A castable and cladding technology, which is applied in the field of refractory materials, can solve the problems of burnout of the cladding metal structure frame, large consumption of spare parts, and little effect, and achieves optimized heat transfer characteristics, low thermal expansion coefficient, and improved microscopic effect of structure

Active Publication Date: 2021-08-03
山西昊业新材料开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, during use, the cover of the tundish mostly shows deformation, warping, partial peeling, and falling off of the cover plate, which in turn leads to overall deformation and burnout of the metal structure frame of the cover, which not only affects the actual service life of the tundish cover and the use effect, and the consumption of spare parts is large, which affects the normal operation of pouring steel
Most of the existing technologies improve the performance of the tundish cover by adjusting the chemical and mineral composition of the cover material, adjusting the matching of the lining layer, and strengthening the combination between the cladding and the refractory material, but with little effect

Method used

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  • Tundish cover castable and method for preparing tundish cover by using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix 32wt% of glass powder, 20wt% of silicon carbide powder, 35wt% of silicon carbide particles, 5wt% of silicon micropowder, 4wt% of glucose, and 4wt% of water. Heat treatment at ℃ for 3 hours, cool to room temperature with the furnace, crush and sieve to obtain prefabricated powder with a particle size of less than 0.088mm and prefabricated granules with a particle size of 0.088-2mm.

[0021] With 55wt% alumina particles, 18wt% alumina fine powder, 2wt% silica powder, 3wt% prefabricated powder, 6wt% prefabricated particles, 4.75wt% alumina micropowder, 0.1wt% metal aluminum powder , 4wt% aluminate cement, 2wt% stainless steel fiber, 0.1wt% sodium tripolyphosphate, 0.05wt% propylene glycol alginate, add 5wt% water and stir evenly, put it in the mold for vibration molding, and then After standing still at room temperature for 24 hours and then heat-treating at 110° C. for 24 hours, the tundish cover is obtained.

Embodiment 2

[0023] Mix 35wt% of glass powder, 18wt% of silicon carbide powder, 34wt% of silicon carbide particles, 4wt% of silicon micropowder, 5wt% of glucose, and 4wt% of water. Heat treatment at -°C for 3 hours, cool down to room temperature with the furnace, crush and sieve to obtain prefabricated powder with a particle size of less than 0.088mm and prefabricated granules with a particle size of 0.088-2mm.

[0024] With 55wt% alumina particles, 18wt% alumina fine powder, 2wt% silica powder, 3wt% prefabricated powder, 6wt% prefabricated particles, 4.73wt% alumina micropowder, 0.1wt% metal aluminum powder , 4wt% aluminate cement, 2wt% stainless steel fiber, 0.1wt% sodium tripolyphosphate, 0.07wt% propylene glycol alginate, and 5wt% water were stirred evenly, then placed in a mold for vibration molding, and then successively After standing still at room temperature for 24 hours and heat-treating at 110° C. for 24 hours, the tundish cover is obtained.

Embodiment 3

[0026] Mix 40wt% of glass powder, 20wt% of silicon carbide powder, 29wt% of silicon carbide particles, 2wt% of silicon micropowder, 5wt% of glucose, and 4wt% of water. Heat treatment at ℃ for 3 hours, cool to room temperature with the furnace, crush and sieve to obtain prefabricated powder with a particle size of less than 0.088mm and prefabricated granules with a particle size of 0.088-2mm.

[0027] With 55wt% alumina particles, 18wt% alumina fine powder, 2wt% silica powder, 3wt% prefabricated powder, 6wt% prefabricated particles, 4.75wt% alumina micropowder, 0.1wt% metal aluminum powder , 4wt% aluminate cement, 2wt% stainless steel fiber, 0.1wt% sodium tripolyphosphate, 0.05wt% propylene glycol alginate, and 5wt% water were stirred evenly, then placed in a mold for vibration molding, and then successively After standing still at room temperature for 24 hours and heat-treating at 110° C. for 24 hours, the tundish cover is obtained.

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Abstract

The invention relates to a tundish cover castable and a method for preparing a tundish cover by using the same, aiming at preventing the tundish cover from cracking, peeling, chipping and the like. The formula of the tundish cover castable comprises 55 to 65 wt% of alumina particles, 10 to 20 wt% of alumina fine powder, 2 to 4 wt% of silicon micro powder, 3 to 5 wt% of prefabricated powder, 5 to 10 wt% of prefabricated particles, 3 to 6 wt% of alumina micro powder, 0.1 wt% of metal aluminum powder, 3 to 6 wt% of aluminate cement, 1 to 3 wt% of stainless steel fiber, 0.1 wt% of sodium tripolyphosphate, 0.02 to 0.1 wt% of propylene glycol alginate and 4 to 6 wt% of water. The method for preparing the tundish cover by using the castable comprises the following steps: putting the mixed castable in a mold for vibration molding, conducting standing at room temperature for 24 hours, and then carrying out heat treatment at 110 DEG C for 24 hours.

Description

technical field [0001] The invention belongs to the technical field of refractory materials. In particular, it relates to a casting material for a tundish cover and a method for preparing a tundish cover by using the casting material. Background technique [0002] The tundish is the intermediate container between the ladle and the crystallizer in the continuous casting production of the metallurgical industry. The tundish cover on the tundish is for the convenience of operators to complete temperature measurement, sampling and other operations, and has the functions of heat insulation, preventing molten steel Secondary oxidation and so on. The working environment of the tundish cover is harsh, mainly including high temperature, hot air baking, rapid heat and rapid cooling, tundish slag erosion, and mechanical stress transmitted by cladding deformation. Therefore, during use, the cover of the tundish mostly shows deformation, warping, partial peeling, and falling off of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66B22D41/00
CPCC04B35/66B22D41/00C04B2235/36C04B2235/428C04B2235/3217C04B2235/402C04B2235/5216C04B2235/447C04B2235/602C04B2235/656C04B2235/6567C04B2235/96C04B2235/9607C04B2235/5427C04B2235/5436C04B2235/526Y02P10/20
Inventor 李华军王周福金少虎刘同宣马飞王璐
Owner 山西昊业新材料开发有限公司
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