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Anti-cracking refractory material based on alumina hollow balls

A technology of alumina hollow balls and refractory materials, which is applied in the field of refractory materials, can solve problems such as cracks, and achieve the effects of improved connectivity, sufficient fuel combustion, and stable performance

Inactive Publication Date: 2019-02-22
湖南嘉顺华新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a crack-proof refractory material based on alumina hollow spheres, which solves the problem that traditional alumina refractory materials are prone to cracks due to long-term work in high-temperature environments

Method used

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  • Anti-cracking refractory material based on alumina hollow balls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: A crack-resistant refractory material based on alumina hollow spheres, such as figure 1 As shown, it includes a fire prevention layer 1, a V-shaped hook 3 and a composite fire prevention layer 2. The backfired layer 1 is the non-high temperature working surface of the alumina refractory material, and the backfired layer 1 includes matrix and aggregate. Matrix includes corundum and Al 2 o 3 Micropowder, aggregates include aluminum oxide hollow spheres, chromium oxide particles and refractory fiber paste, refractory fiber paste is used as an organic binder. The composite fire-facing layer 2 is a high-temperature working surface of alumina refractory material, and the composite fire-facing layer 2 includes expanded perlite-graphite mixed emulsion 21 and far-infrared radiation coating 22 .

[0025] Its preparation method is as follows:

[0026] (1) Corundum and Al 2 o 3 The micropowder is mixed according to the weight ratio of 1:1, stirred evenly by stir...

Embodiment 2

[0034] Embodiment 2: A kind of anti-cracking refractory material based on alumina hollow spheres, such as figure 1 As shown, the difference from Example 1 is that the matrix accounts for 25% of the total weight of the alumina refractory. Aggregate accounts for 55% of the total weight of the alumina refractory material, alumina hollow balls account for 35% of the total mass of the aggregate, and refractory fiber paste used as an aggregate component accounts for 45% of the total mass of the aggregate.

[0035] The thickness of the expanded perlite-graphite mixed milk 21 is 12 cm. Far-infrared radiation coating 22 has a thickness of 4cm.

[0036] The alumina refractory material obtained in this example has a high refractoriness, which can reach 1700°C±30°C, is suitable for a working environment with a temperature of ≤1600°C, has relatively moderate cost, and is not prone to cracks during long-term use.

Embodiment 3

[0037] Embodiment 3: A kind of anti-cracking refractory material based on alumina hollow spheres, such as figure 1 As shown, the difference from Example 1 is that the matrix accounts for 20% of the total weight of the alumina refractory. Aggregate accounts for 50% of the total weight of the alumina refractory material, alumina hollow balls account for 30% of the total mass of the aggregate, and refractory fiber paste used as an aggregate component accounts for 40% of the total mass of the aggregate.

[0038] The thickness of the expanded perlite-graphite mixed emulsion 21 is 10 cm. The far-infrared radiation coating 22 has a thickness of 2 cm.

[0039] The alumina refractory material obtained in this example has a high refractoriness, which can reach 1650°C±20°C, is suitable for a working environment with a temperature of ≤1550°C, has low cost, and is not prone to cracks during long-term use.

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Abstract

The invention discloses an anti-cracking refractory material based on alumina hollow balls, and belongs to the technical field of refractory materials. The alumina refractory material comprises a back-to-fire layer, V-shaped hooks and a composite face-to-fire layer; the back-to-fire layer comprises a substrate and an aggregate; the substrate comprises carborundum and Al2O3 micro powder; the aggregate comprises the alumina hollow balls, chromium oxide particles and refractory fiber paste; the composite face-to-fire layer is athe high-temperature working face of the alumina refractory material and comprises expanded perlite-graphite mixed emulsion and far infrared radiant coating. A preparation method of the anti-cracking refractory material comprises the following steps that the substrate is prepared; the aggregate is prepared; the back-to-fire layer is prepared; the expanded perlite-graphite mixed emulsion is prepared; and the surface of the expanded perlite-graphite mixed emulsion iscoated with the far infrared radiant coating. According to the anti-cracking refractory material, the problem that a traditional alumina refractory material is prone to cracking due to working at thehigh temperature environment for a long time is solved.

Description

technical field [0001] The invention relates to the technical field of refractory materials, more specifically, it relates to a crack-resistant refractory material based on alumina hollow spheres. Background technique [0002] Alumina hollow spheres are a new type of high-temperature insulation material, which is melted and blown from industrial alumina in an electric furnace, and its crystal form is a-Al 2 o 3 microcrystals. With alumina hollow spheres as the main body, it can be made into products of various shapes. The maximum service temperature is 1800°C. The product has high mechanical strength, which is several times that of general light products, and its volume density is only half of that of corundum products. [0003] Alumina hollow spheres are a common refractory material, and alumina refractory products can be used as the working lining of high-temperature kilns. However, although the existing refractory materials made of alumina hollow spheres can play a goo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 刘明红
Owner 湖南嘉顺华新材料有限公司