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Spinel castable

A spinel castable and aluminum spinel technology, which is applied in the field of refractory materials, can solve the hidden dangers of safety production in molten salt furnaces, poor flowability of castables, and low bonding strength, etc. Continued and reliable performance and improved thermal shock resistance

Inactive Publication Date: 2016-11-09
万燕杰
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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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  • Spinel castable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Example 1, 50 parts of 12-5mm chrome corundum, 10 parts of 5-3mm aluminum spinel, 5 parts of 3-1mm calcium hexaaluminate, 4 parts of 1-0mm andalusite, 1 part of 200 mesh Yongji clay, 325 mesh zirconium 10 parts of calcium acid powder, 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, CA60 cement 3 parts, plus additive REFPAC ® 100 1 part, plus fluidity improving additive Peramin ® 0.1 part of AL 200, plus 0.1 part of nanocellulose.

Embodiment 2

[0068] Example 2, 50 parts of 12-5mm chrome corundum, 7 parts of 5-3mm aluminum spinel, 5 parts of 3-1mm calcium hexaaluminate, 3 parts of 1-0mm andalusite, 1 part of 200 mesh Yongji clay, 325 mesh zirconium Calcium acid 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, plus additive REFPAC ® 100 1 part, plus fluidity improving additive Peramin ® 0.1 part of AL 200, plus 0.1 part of nanocellulose.

Embodiment 3

[0069] Example 3, 55 parts of 12-5mm chrome corundum, 8 parts of 5-3mm aluminum spinel, 5 parts of 3-1mm calcium hexaaluminate, 3 parts of 1-0mm andalusite, 2 parts of 200 mesh Yongji clay, 325 mesh zirconium Calcium acid powder 9 parts, 325 mesh cutting powder 3 parts, zinc silicate zirconium powder 3 parts, 800 mesh andalusite powder 4 parts, 1000 mesh iron zinc spinel powder 1 part, 1000 mesh zinc oxide powder 3 parts, CA60 cement 4 parts, plus the additive REFPAC ® 100 1 part, plus fluidity improving additive Peramin ® 0.1 part of AL 200, plus 0.1 part of nanocellulose.

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Abstract

The invention aims at providing a spinel castable. The spinel castable is good in construction performance and high in strength, impurities such as ferric oxide contained in a material can be purified, and finally, the castable which can have the high CO corrosion resistance, the good abrasion resistance and the good construction performance at the high reduction atmosphere, and meanwhile can have the good performance at the middle and low temperature and the high temperature is obtained.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a spinel 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 large-scale peeling off...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 万燕杰
Owner 万燕杰
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