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Anti-cracking refractory material

A technology of refractory materials and refractory fibers, which is applied in the field of refractory materials, can solve problems such as cracks, achieve fast drying speed, high energy saving rate, and improve thermal efficiency

Inactive Publication Date: 2019-02-15
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, which solves the problem that the traditional alumina refractory material is prone to cracks due to long-term work in a high-temperature environment

Method used

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  • Anti-cracking refractory material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: A kind of anti-crack refractory material, 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 vermiculite-refractory fiber paste-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 stirri...

Embodiment 2

[0034] Embodiment 2: A kind of anti-crack refractory material, 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 vermiculite-refractory fiber paste-graphite mixed emulsion 21 is 12cm. The far-infrared radiation coating 22 has a thickness of 4 cm.

[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-crack refractory material, 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 expanded vermiculite-refractory fiber paste-graphite mixed emulsion 21 is 10cm. 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 working environments 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, and belongs to the technical field of refractory materials. The aluminum oxide refractory material comprises a backdraft layer, a V-shapedhook and a composite fire facing layer, wherein the backdraft layer comprises a matrix and aggregates; the matrix comprises emery and Al2O3 micro-powder; the aggregates comprise aluminum oxide hollowspheres, chromium oxide particles and refractory fiber paste; the composite fire facing layer is a high-temperature working surface of the aluminum oxide refractory material; and the composite fire facing layer comprises expanded vermiculite-refractory fiber paste-graphite mixed emulsion and a far infrared radiation coating. The preparation method comprises the following steps: preparing the matrix; preparing the aggregates; preparing the backdraft layer; preparing the expanded vermiculite-refractory fiber paste-graphite mixed emulsion; and coating the surface of the expanded vermiculite-refractory fiber paste-graphite mixed emulsion with the far infrared radiation coating. The problem that a traditional aluminum oxide refractory material has cracks easily due to working in a high-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-proof refractory material. Background technique [0002] Any material whose physical and chemical properties allow it to be used in a high temperature environment is called a refractory material. Refractory materials are widely used in metallurgy, chemical industry, petroleum, machinery manufacturing, silicate, power and other industrial fields, and are used in the largest amount in the metallurgical industry, accounting for 50% to 60% of the total output. There are many kinds of refractory materials with different uses. There are many classification methods for refractory materials, among which there are mainly chemical property classification methods, chemical mineral composition classification methods, production process classification methods, and material form classification methods. [0003] The existing alumina refractory materials us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/12C04B35/105C04B35/622C04B41/87F27D1/06
CPCC04B35/66C04B35/12C04B35/622C04B41/5001C04B41/5027C04B41/87C04B2235/425F27D1/06
Inventor 刘明红
Owner 湖南嘉顺华新材料有限公司
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