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Mullite-based castable used for tundish cover and production method thereof

A production method and technology of mullite, applied in the field of refractory unshaped refractory products, can solve the problems of thermal shock stability constraints of the cover

Inactive Publication Date: 2018-03-06
瑞泰马钢新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of the bauxite particles, the thermal shock stability of this type of cover is restricted to a certain extent, and the mullite cover with good thermal shock stability has not been reported in the literature.

Method used

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  • Mullite-based castable used for tundish cover and production method thereof
  • Mullite-based castable used for tundish cover and production method thereof
  • Mullite-based castable used for tundish cover and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A mullite castable for a tundish cover, the mullite castable for a tundish cover is prepared from a main material and an additive, and the weight percentage of the main material is shown in Table 1. Described admixture comprises 446# steel fiber, ADS 1 Water reducing agent, ADW 1 Water reducer, aluminum powder, organic explosion-proof fiber and water, the weight percentages of each component in the main material are: 446# steel fiber 2%, ADS 1 Water reducer 0.8%, ADW 1 0.4% water reducing agent, 0.25% aluminum powder, 0.15% organic explosion-proof fiber and 6.0% water.

[0029] Its preparation method is as follows:

[0030] (1) Premixing: corundum fine powder, α-Al 2 o 3 Micropowder, SiO 2 Micropowder, kyanite, cement and half of the admixture are premixed;

[0031] (2) Mixing and grinding: Mix and grind mullite particles and corundum particles, add the other half of the admixture for mixing and grinding, then add the premix obtained in step (1) and mix and grind...

Embodiment 2

[0039] A mullite castable for the tundish cover, the mullite castable for the tundish cover is prepared from a main material and an additive, and the weight percentage of the main material is shown in Table 2. Described admixture comprises 446# steel fiber, ADS 1 Water reducing agent, ADW 1 Water reducer, aluminum powder, organic explosion-proof fiber and water, the weight percentages of each component in the main ingredients are: 446# steel fiber 1%, ADS 1 Water reducer 1.0%, ADW 1 1.0% water reducing agent, 0.10% aluminum powder, 0.40% organic explosion-proof fiber and 6.5% water. Its preparation method is with embodiment 1.

[0040] Raw materials and parts by weight contained in the main ingredients of table 2

[0041]

Embodiment 3

[0043] A mullite castable for the tundish cover. The mullite castable for the tundish cover is prepared from main ingredients and additives. The weight percentage of the main ingredients is shown in Table 3. Described admixture comprises 446# steel fiber, ADS 1 Water reducing agent, ADW 1 Water reducer, aluminum powder, organic explosion-proof fiber and water, the weight percentages of each component in the main material are: 446# steel fiber 3%, ADS 1 Water reducer 0.5%, ADW1 0.1% water reducing agent, 0.50% aluminum powder, 0.05% organic explosion-proof fiber and 6.2% water. Its preparation method is with embodiment 1.

[0044] Raw materials and parts by weight contained in the main ingredients of table 3

[0045]

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Abstract

The invention discloses a mullite-based castable used for a tundish cover and a production method thereof. The mullite-based castable used for a tundish cover is prepared from main materials and additives, wherein the main materials include the following components in weight percentage: 40-60% of mullite particles, 10-30% of corundum particles, 5-20% of corundum fine powder, 2-10% of alpha-AI203 micropowder, 1-5% of SiO2 micropowder, 5-10% of raw material (kyanite, sillimanite and andalusite), and 3-10% of cement. The additives include the following components in weight percentage: 1-3% of No.446 steel fiber, 0.5-2.0% of a water reducing agent, 0.02-0.5% of aluminium powder, 0.05-0.5% of organic anti-explosion fiber, and 5.5-6.5% of water. A tundish cover produced by using the castable ishigh in normal and high temperature strength, good in thermal shock stability, remarkable in the effect of prolonging the service life of the tundish cover, and obvious in economic benefit.

Description

technical field [0001] The invention belongs to the technological innovation invention in the field of unshaped refractory products of refractory materials, and specifically relates to a mullite castable for tundish covers and a production method thereof. Background technique [0002] With the development of metallurgy and refractory technology and the intensification of market competition, the service life of castables for tundish covers has become increasingly demanding, especially after some steel mills have conducted in-depth studies on the flow field of tundishes, the tundish impact zone The optimization and expansion make the use conditions of the tundish cover in the impact area more severe, and it is easy to be damaged and fall off, resulting in a decrease in the service life of the entire tundish cover. In order to meet user requirements, increasing the overall service life of the tundish cover has received increasing attention. At present, most of the castables for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/185C04B35/66C04B35/101
CPCC04B35/101C04B35/185C04B35/66C04B2235/3418C04B2235/3463C04B2235/402C04B2235/5216C04B2235/96C04B2235/9607
Inventor 刁德胜王德军郁书中许承凤
Owner 瑞泰马钢新材料科技有限公司
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