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A kind of corundum refractory castable

A technology of refractory castables and corundum, applied in the field of refractory materials, can solve problems such as cracks and increase porosity, achieve high reactivity, reduce porosity, and improve performance

Inactive Publication Date: 2011-11-30
浙江亿维高温材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these two methods can achieve relatively obvious effects, the added nano-calcium carbonate or magnesium carbonate will decompose at a certain temperature to produce CO2 gas, and the gas may have some impact on the internal structure of the material when the gas is discharged from the inside of the material. Negative effects, such as causing cracks, increasing the porosity of the material, etc.

Method used

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  • A kind of corundum refractory castable
  • A kind of corundum refractory castable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: The distribution ratio of the main ingredients is: 89wt% fused white corundum, 8wt% aluminum oxide powder, 2wt% aluminum oxide hydrate, 1wt% nano-zinc oxide, and 0.2wt% organic dispersant in the main ingredient.

Embodiment 2

[0026] Example 2: The distribution ratio of each component of the main ingredient is: 85wt% of sintered tabular corundum, 11wt% of alumina micropowder, 2wt% of hydrated alumina, 2wt% of nano zinc oxide, and 0.2wt% of the main ingredient is organic dispersant.

Embodiment 3

[0033] Example 3: The distribution ratio of each component of the main material is: 80wt% of fused white corundum, 15wt% of alumina micropowder, hydrated

[0034] Aluminum oxide 3wt%, nano zinc oxide 2wt%, organic dispersant 0.05-5wt%.

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Abstract

The invention discloses a corundum refractory castable. The raw materials used include a main material and an added organic dispersant. The main material is composed of corundum particles and fine powder, nano zinc oxide, aluminum oxide powder, and a binder. The weight percent of the raw materials is: 80-95wt% of corundum particles and fine powder, 3-15wt% of alumina micropowder, 1-5wt% of binder, 0.2-5wt% of nano-zinc oxide, and the added organic dispersant is the weight of the main material. 0.05-0.3 wt%. The present invention utilizes the characteristics of fine particle size of nano-zinc oxide powder, high activity at high temperature, moderate price and the like to improve the structure of the corundum castable, increase the medium-temperature strength, and prepare a corundum castable with excellent comprehensive performance and moderate price.

Description

technical field [0001] The invention belongs to the field of refractory materials, in particular to corundum refractory castables. Background technique [0002] Corundum refractory castables are widely used in metallurgy, petrochemical, building materials and other industries due to their excellent high temperature performance. However, due to the use of calcium aluminate cement and SiO2 micropowder in traditional low-cement or ultra-low-cement bonded corundum castables, the temperature at which the liquid phase appears in the material decreases, which seriously affects the high-temperature performance of the material. The cement-free corundum castables have low medium-temperature strength due to the decomposition of hydrates in the binder during the medium-temperature stage (800-1100°C), and no new binding phases, which cannot meet the requirements of on-site use. Therefore, people introduce nano-materials into corundum castables to improve the medium temperature performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 谢朝晖张秀丽
Owner 浙江亿维高温材料有限公司
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