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High-aluminum low-silicon casting material

A castable, low-silicon technology, applied in the field of refractory materials, can solve the problems of low compressive strength, achieve the effects of enhanced erosion resistance, improved thermal shock resistance, and reduced CaO content

Inactive Publication Date: 2015-11-18
港泰耐火材料(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the above-mentioned prior art, the problem solved by the present invention is: the traditional high-aluminum-low-silicon castable has low compressive strength

Method used

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  • High-aluminum low-silicon casting material
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  • High-aluminum low-silicon casting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A high-alumina and low-silicon castable, the components and the mass percentages of the components are as follows: low-silicon dense fused white corundum 3-5mm accounts for 20%, low-silicon dense fused white corundum 1-3mm accounts for 20%, and low-silicon dense fused white corundum 1-3mm accounts for 20%. Silicon dense fused white corundum 0~1mm accounts for 20%, alumina micropowder α-A accounts for 1%, activated alumina ρ-A accounts for 2%, nano-sized ZrO 2 3%, alumina and zirconia 1%, CA-70 pure calcium aluminate cement 8%, 320 mesh fused white corundum 25%. Low-silicon dense fused white corundum 1-3 mm means that the particle size of low-silicon dense fused white corundum is within the range of 1-3 mm.

[0019] The properties and comparative values ​​of the high-aluminum-low-silicon castable prepared in this example are as follows:

[0020] One: The compressive strength at high temperature is improved, as shown in the following table:

[0021] temperature...

Embodiment 2

[0025] A high-alumina and low-silicon castable, the components and the mass percentages of the components are as follows: low-silicon dense fused white corundum 3-5mm accounts for 23%, low-silicon dense fused white corundum 1-3mm accounts for 22%, and low-silicon dense fused white corundum 1-3mm accounts for 22%. Silicon dense fused white corundum 0~1mm accounts for 15%, alumina micropowder α-A accounts for 3%, activated alumina ρ-A accounts for 4%, nano-sized ZrO 2 4%, alumina and zirconia 3%, CA-70 pure calcium aluminate cement 6%, 320 mesh fused white corundum 20%.

[0026] The properties and comparative values ​​of the high-aluminum-low-silicon castable prepared in this example are as follows:

[0027] One: The compressive strength at high temperature is improved, as shown in the following table:

[0028] temperature value

conventional material

this invention

at 1095°C

54.6MPa

85MPa

at 1370°C

67.8 MPa

92MPa

[0029] ...

Embodiment 3

[0032] A high-alumina and low-silicon castable, the components and the mass percentages of the components are as follows: low-silicon dense fused white corundum 3-5mm accounts for 30%, low-silicon dense fused white corundum 1-3mm accounts for 16%, and low-silicon dense fused white corundum 1-3mm accounts for 16%. Silicon dense fused white corundum 0~1mm accounts for 11%, alumina micropowder α-A accounts for 5%, activated alumina ρ-A accounts for 7%, nano-sized ZrO 2 6%, alumina and zirconia 5%, CA-70 pure calcium aluminate cement 3%, 320 mesh fused white corundum 17%.

[0033] The properties and comparative values ​​of the high-aluminum-low-silicon castable prepared in this example are as follows:

[0034] One: The compressive strength at high temperature is improved, as shown in the following table:

[0035] temperature value

conventional material

this invention

at 1095°C

54.6MPa

83 MPa

[0036] at 1370°C

67.8 MPa

90M...

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Abstract

The invention discloses a high-aluminum low-silicon casting material. The high-aluminum low-silicon casting material comprises the following components in percentage by weight: 44-73% of low-silicon compact electrofusion white alundum, 1-5% of aluminum oxide micro powder alpha-A, 2-7% of active aluminum oxide rho-A, 3-6% of nanometer-level ZrO2, 1-5% of an additive, 3-8% of pure calcium aluminate cement and 17-25% of 320-mesh electrofusion white alundum. The high-aluminum low-silicon casting material disclosed by the invention is high in strength, good in toughness and small in linear variation under high temperature environment.

Description

technical field [0001] The invention relates to a refractory material, in particular to a component of the refractory material. Background technique [0002] At present, the components of high-alumina and low-silicon castables generally include low-silicon dense fused white corundum, alumina micropowder α-A, admixtures, pure calcium aluminate cement, and 320 mesh fused white corundum. However, when the temperature of this high-alumina and low-silicon castable is high, when the temperature reaches thousands of levels, its compressive strength is not high, and it is often damaged, and its service life is short, which increases the production cost of the enterprise. At the same time, such high-alumina and low-silicon castables have a large line change under high temperature conditions. Contents of the invention [0003] Aiming at the shortcomings of the above-mentioned prior art, the problem solved by the present invention is: the traditional high-aluminum-low-silicon castab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B22/06
Inventor 樊秋官孟铭新盈生才孟中平
Owner 港泰耐火材料(江苏)有限公司
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