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Zirconia alumina refractory castable

A refractory castable, zirconium corundum-based technology, applied in the field of refractory materials, can solve the problems of safety hazards in molten salt furnace production, poor fluidity of castables, low bonding strength, etc., to improve oxidation resistance and continuous and reliable construction performance , Improve the effect of thermal shock resistance

Inactive Publication Date: 2016-12-14
张婷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of castable has low hardness and poor wear resistance; at the same time, the castable has poor fluidity, solidifies too quickly, and has low early bonding strength, which seriously affects the performance of the product at medium and low temperatures below 900 °C, which poses a threat to the safety of molten salt furnaces. Production brings great hidden dangers. In addition, it is not easy to construct, so it still needs to be improved

Method used

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  • Zirconia alumina refractory castable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064]Example 1, 50 parts of 12-5mm zirconium corundum, 10 parts of 5-3mm silicon carbide, 5 parts of 3-1mm calcium hexaaluminate, 4 parts of 1-0mm andalusite, 1 part of 200 mesh Yongji clay, 325 mesh zirconium corundum powder 10 parts, 5 parts of 325 mesh cutting powder, 5 parts of zinc silicate zirconium powder, 3 parts of 800 mesh andalusite powder, 1 part of 1000 mesh iron zinc spinel powder, 3 parts of 1000 mesh zinc oxide powder, 3 parts of CA60 cement, Additive REFPAC ® 100 1 part, plus fluidity improving additive Peramin ® AL 200 0.1 part.

Embodiment 2

[0065] Example 2, 50 parts of 12-5mm zirconium corundum, 7 parts of 5-3mm silicon carbide, 5 parts of 3-1mm calcium hexaaluminate, 3 parts of 1-0mm andalusite, 1 part of 200 mesh Yongji clay, 325 mesh zirconium corundum powder 8 parts, 325 mesh cutting powder 6 parts, zinc silicate zirconium powder 5 parts, 800 mesh andalusite powder 3 parts, 1000 mesh iron zinc spinel powder 1 part, 1000 mesh zinc oxide powder 5 parts, CA60 cement 6 parts, Additive REFPAC ® 100 1 part, plus fluidity improving additive Peramin ® AL 200 0.1 part.

Embodiment 3

[0066] Example 3, 55 parts of 12-5mm zirconium corundum, 8 parts of 5-3mm silicon carbide, 5 parts of 3-1mm calcium hexaaluminate, 3 parts of 1-0mm andalusite, 2 parts of 200 mesh Yongji clay, 325 mesh zirconium corundum powder 9 parts, 3 parts of 325 mesh cutting powder, 3 parts of zinc silicate zirconium powder, 4 parts of 800 mesh andalusite powder, 1 part of 1000 mesh iron-zinc spinel powder, 3 parts of 1000 mesh zinc oxide powder, 4 parts of CA60 cement, Additive REFPAC ® 100 1 part, plus fluidity improving additive Peramin ® AL 200 0.1 part.

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Abstract

The invention provides a zirconia alumina refractory castable which is relatively high in CO erosion resistance in a strong reduction atmosphere, relatively high in wear resistance and high in construction performance; meanwhile, the castable is relatively high in strength and excellent in comprehensive performance in the whole temperature stage from low temperature to medium temperature and to high temperature; the original defect that the existing castable is only high in high temperature performance is avoided.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a zirconium corundum refractory castable. Background technique [0002] The characteristics of high alumina, high silicon, poor grindability and difficult dissolution in my country's durasite-type bauxite have brought great troubles to the alumina production process. For now, the pipeline dissolution method has gradually become a The development trend, and the molten salt furnace is the most critical heating equipment in the pipeline dissolution system. [0003] At present, the hearth of the molten salt furnace in an alumina plant is usually integrally cast with high-alumina refractory castables, which makes the structure of the furnace lining very loose or even cracked. In the process of use, the strong erosion of high-temperature flue gas and coal ash, and the fluctuation of furnace temperature will cause serious erosion of the furnace lining and cause ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/106
CPCC04B35/106C04B2235/3222C04B2235/327C04B2235/3284C04B2235/3427C04B2235/3436C04B2235/349C04B2235/3826C04B2235/96C04B2235/9607
Inventor 张婷
Owner 张婷
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