Corundum-mullite self-flow refractory castable

A technology of refractory castables and mullite, applied in the field of refractory castables, can solve the problems of restricting the service life of refractory castables, the service life is only three months, and the service life is only five months, so as to ensure the demolding strength and High temperature use temperature, long service life and good thermal shock stability

Inactive Publication Date: 2009-04-01
ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing refractory castables generally have weaknesses such as poor fluidity and poor thermal shock stability. During construction, more water needs to be added. During the construction process, construction personnel must also vibrate the permanent vibrating rod continuously to fill the castable into the support film. In the cavity, the entity obtained by casting in this way is prone to consequences such as high porosity, poor chemical corrosion resistance, and low strength, which restricts the service life of refractory castables in actual engineering, especially in special cases such as complex casting shapes and thin walls. parts, its service life is shorter
For example, the service life of the existing coal injection pipe refractory castable is only three months, and the service life of the refractory materials for the kiln head cover and kiln mouth is only five months

Method used

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  • Corundum-mullite self-flow refractory castable
  • Corundum-mullite self-flow refractory castable

Examples

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Effect test

Embodiment 1

[0035] A corundum mullite self-flowing refractory castable, comprising the following components and the mass percentage of each component is:

[0036] Tabular alumina 30%

[0037] Silicon carbide powder 8%

[0038] Pure calcium aluminate cement 4%

[0039] Mullite 45%

[0040] α-Al 2 o 3 Micronized 10%

[0041] Bonet 3%.

[0042] α-Al 2 o 3 Micropowder is a common material on the market. The more common method is to use ammonium aluminum sulfate and ammonium bicarbonate as raw materials, and prepare a new precursor of aluminum oxide—ammonium aluminum carbonate [NH4AlO(OH)HCO3] by precipitation method. The precursor undergoes a phase transition during heat treatment, and the phase transition process is: amorphous (350°C)→γ(700°C)→γ+θ(1050°C)→θ+α(1100°C)→α(1200°C) , forming α-Al 2 o 3 Micronized.

[0043] Bonet is a new type of synthetic dense refractory aggregate based on calcium hexaaluminate CA6 mineral phase. Synthetic alumina-based tabular alumina and spinel a...

Embodiment 2

[0051] A corundum mullite self-flowing refractory castable, comprising the following components and the mass percentage of each component is:

[0052] Tabular alumina 33%

[0053] Silicon carbide powder 7%

[0054] Pure calcium aluminate cement 4%

[0055] Mullite 40%

[0056] α-Al 2 o 3 Micronized 12%

[0057] Bonet 4%.

Embodiment 3

[0059] A corundum mullite self-flowing refractory castable, comprising the following components and the mass percentage of each component is:

[0060] Tabular alumina 35%

[0061] Silicon carbide powder 5%

[0062] Pure calcium aluminate cement 5%

[0063] Mullite 35%

[0064] α-Al 2 o 3 Micronized 15%

[0065] Bonnet 5%.

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Abstract

The invention discloses a corundum mullite artesian fireproof casting material, which comprises 30-35% of plate-shaped corundum, 5-8% of carborundum powder material, 4-5% of pure calcium aluminate cement, 35-45% of mullite, 10-15% of alpha-Al2O3 micropowder and 3-5% of bonite by mass percentage. The casting material is characterized by good fluidity, good resistance to thermal shock, low porosity rate of entity after casting, good chemical resistance, high intensity and long service life.

Description

technical field [0001] The invention relates to a refractory castable, in particular to a corundum mullite artesian refractory castable. Background technique [0002] Existing refractory castables generally have weaknesses such as poor fluidity and poor thermal shock stability. During construction, more water needs to be added. During the construction process, construction personnel must also vibrate the permanent vibrating rod continuously to fill the castable into the support film. In the cavity, the entity obtained by casting in this way is prone to consequences such as high porosity, poor chemical corrosion resistance, and low strength, which restricts the service life of refractory castables in actual engineering, especially in special cases such as complex casting shapes and thin walls. position, its service life is shorter. For example, the service life of the existing coal-injection pipe refractory castables is only three months, and the service life of the refracto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 朱其良唐春强朱国平朱锦和
Owner ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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