Al2O3/ZrO2 refractory casting material and using method thereof

A technology of refractory castable and mullite, applied in the field of refractory castable, can solve the problems of long production process, inconvenient use and high manufacturing cost, and achieve the effects of excellent thermal shock resistance, wide adaptability and convenient use.

Active Publication Date: 2009-07-08
成都蜀冶新材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this prior art still has the disadvantages of long pr

Method used

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  • Al2O3/ZrO2 refractory casting material and using method thereof
  • Al2O3/ZrO2 refractory casting material and using method thereof

Examples

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Embodiment

[0092] A mullite-bonded aluminum-zirconium refractory castable, consisting of aggregate, powder and additives:

[0093] A. The aggregate is composed of brown corundum and sub-white corundum, among which brown corundum with a particle size of 3-5mm accounts for 30% of the sum of aggregate and powder mass; brown corundum with a particle size of 1-3mm accounts for 30% of the sum of aggregate and powder mass 25%, sub-white corundum with a particle size of 0.5-1mm accounts for 15% of the sum of aggregate and powder;

[0094] B. The powder is composed of the following raw materials: silica powder accounts for 3% of the sum of aggregate and powder mass, white mud accounts for 2% of the sum of aggregate and powder mass, α-Al203 powder accounts for aggregate and powder mass 8% of the sum; ρ-Al203 powder accounts for 3% of the sum of aggregate and powder mass; sub-white corundum powder accounts for 7% of the sum of aggregate and powder mass; zircon powder accounts for aggregate and powd...

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Abstract

The invention discloses a mullite combined zirconia-alumina refractory castable material, wherein aggregate consists bauxite chamotte accounting for 50 to 80 percent of the total mass of the aggregate and powder, brown alumina and sub-white corundum; the powder consists of silicon powder, rho-Al2O3 micro powder, sub-white corundum powder, alpha-Al2O3, zirconite powder, white slime, bauxite chamotte powder, high alumina cement and pure calcium aluminate cement; and the additive consists of sodium hexametaphosphate and water. The invention overcomes the defects of poor thermal shock stability and high cost in the prior art, and provides the refractory castable material with good thermal shock stability, short production flow, low cost and convenient use, and the refractory castable material can be widely applied to refractory linings of high and medium temperature furnaces.

Description

technical field [0001] The invention relates to a refractory castable with excellent thermal shock resistance, in particular to a mullite-bonded aluminum-zirconium refractory castable and a use method thereof. Background technique [0002] Ultra-fine silica powder combined with refractory castables is cheap and high-quality with good high-temperature performance. However, in refractory linings with frequent thermal shocks such as blast furnace hot blast stoves, regenerative heating furnace regenerative burners and regenerative tanks, gap heating furnaces, etc., the thermal stress generated due to frequent alternation of cold and heat or large cross-sectional temperature differences will Cause thermal shock peeling, falling off, affecting the service life of the refractory lining. In CN1284487 published on February 21, 2001, the patent titled "Zirconium oxide-mullite composite refractory material with reaction sintering product as binding phase and preparation method" disclo...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/185C04B35/109
Inventor 张命荣
Owner 成都蜀冶新材料有限责任公司
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