Zirconium-containing alumina hollow sphere insulating brick and preparation method thereof

An alumina hollow sphere, zirconium alumina technology, applied in the field of refractory materials, can solve the problems of low strength, poor thermal shock stability, short service life, etc., and achieve the effect of improving thermal shock stability

Inactive Publication Date: 2018-09-14
LUOYANG LIER REFRACTORY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of poor thermal shock stability and low strength of alumina hollow ball bricks in the prior art and short

Method used

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  • Zirconium-containing alumina hollow sphere insulating brick and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A zirconium-containing alumina hollow sphere heat-insulating brick, whose components include 69% of alumina hollow spheres with a particle size of 0-3mm and an aluminum content ≥ 99.5%, 21% of alumina micropowder of 3-5um, and 325-mesh zircon Fine powder 10%.

[0030] The sum of the weight percentages of the above components is 100%, and the following weight percentages are additionally added, and the calculation basis of the added amount is the weight sum of the above components: aluminum sulfate and aluminum dihydrogen phosphate composite binder 8.5%.

[0031] The preparation method of the zirconium-containing alumina hollow spherical heat insulation brick is as follows:

[0032] (1) Weigh alumina micropowder and zirconite powder respectively according to the above requirements, mix the weighed alumina micropowder and zirconite powder for 15-20 minutes, and then place the weighed components in a vibrating mill for mixing uniform and ready for use;

[0033] (2) After...

Embodiment 2

[0036] A zirconium-containing alumina hollow sphere heat insulation brick, the components of which include 35% alumina hollow spheres with a particle size of 0-3 mm and an aluminum content ≥ 99.5%, and alumina hollow spheres with a particle size of 0-3 mm and a zirconium content of 5% 25%, 35% of 3-5um alumina powder, 3-5um monoclinic zirconia or oxide-stabilized zirconia (yttrium oxide or magnesium oxide stabilized) 5%.

[0037] The sum of the weight percentages of the above components is 100%, and the following weight percentages are additionally added, and the calculation basis of the added amount is the weight sum of the above components: 12% of dextrin.

[0038] The preparation method of the zirconium-containing alumina hollow spherical heat-insulating brick is the same as that in Example 1, except that the semi-finished product is dried at 130°C for 48 hours, fired at 1680°C, and kept for 9 hours.

Embodiment 3

[0040] A zirconium-containing alumina hollow sphere heat-insulating brick, the components of which include 50% of alumina hollow spheres with a particle size of 0-3mm, 36% of alumina micropowder of 3-5um, and 14% of 325-mesh zircon mullite fine powder.

[0041] The sum of the weight percentages of the above components is 100%, and the following weight percentages are additionally added, and the calculation basis of the added amount is the weight sum of the above components: phosphoric acid 10%.

[0042] The preparation method of the zirconium-containing alumina hollow sphere heat-insulating brick is the same as that in Example 2, except that the semi-finished product is dried at 110°C for 12 hours, fired at 1580°C and held for 8 hours.

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Abstract

The invention relates to a zirconium-containing alumina hollow sphere insulating brick. The insulating brick comprises the following components in percentage by mass: 40-69% of alumina hollow spheres,21-46% of alumina micro powder and 5-14% of zirconium-containing powder, wherein the sum is 100%. Extra components in percentage by weight are added, and a calculation basis of the addition amount isa ratio of the sum of the weight of the previous components to a binding agent of 8.5-12%. The condition that the traditional zirconium-containing alumina hollow sphere insulating brick is single inmain composition is improved, the matrix toughness is increased, and the characteristics of the material such as strength, thermal shock resistance and the like are improved, so that the service lifeof the insulating brick is prolonged.

Description

technical field [0001] The invention relates to a refractory brick in the field of refractory materials, in particular to a zirconium-containing alumina hollow spherical heat insulation brick and a preparation method thereof. Background technique [0002] Alumina hollow sphere heat insulation brick is a new type of lightweight heat insulation material. Since its application, it has quickly occupied the high temperature kiln market with its excellent properties such as light weight, high temperature resistance, good heat preservation and energy saving effect. At present, alumina hollow sphere insulation bricks are mostly made of alumina hollow spheres as aggregate, alumina powder or micropowder as base material, phosphoric acid or aluminum dihydrogen phosphate as binder, and fired at high temperature. The main component is single, Al 2 o 3 The content is as high as 98%. Therefore, the thermal shock stability is not good, and it becomes one of the key factors affecting its se...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/106C04B35/63C04B35/636
CPCC04B35/106C04B35/6309C04B35/6365C04B2235/77C04B2235/96C04B2235/9607
Inventor 张宇翠李有奇高耸杨付乾张涛杨参姚晨臣林莎莎
Owner LUOYANG LIER REFRACTORY MATERIAL
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