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Wear-resistant repair material for CFB boiler and preparation method of wear-resistant repair material

A circulating fluidized bed and repairing material technology, which is applied in the field of wear-resistant materials preparation, can solve problems such as poor effects, achieve the effects of filling harmful pores, slowing down hydration reactions, and saving costs

Inactive Publication Date: 2022-01-18
宜兴市兴贝耐火保温工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its effect is not good when used as repair material

Method used

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  • Wear-resistant repair material for CFB boiler and preparation method of wear-resistant repair material
  • Wear-resistant repair material for CFB boiler and preparation method of wear-resistant repair material
  • Wear-resistant repair material for CFB boiler and preparation method of wear-resistant repair material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A wear-resistant repair material for a CFB circulating fluidized bed boiler, comprising 47 parts by weight of brown corundum powder, 4 parts of modified circulating fluidized bed ash, 1.7 parts of aluminum dihydrogen phosphate cement, 0.9 parts of explosion-proof fiber, ceramic 0.8 parts of fiber, 0.4 parts of dispersant, 2.5 parts of zirconia powder, 3 parts of yttrium oxide powder, 1 part of titanium diboride powder;

[0031] The average particle size of brown corundum powder is 1.5 mm, the average particle size of zirconia powder is 0.8 mm, the average particle size of yttrium oxide powder is 260 μm, and the average particle size of titanium diboride powder is 500 μm;

[0032] The average particle size of the modified circulating fluidized bed ash is 65 μm, and the modified circulating fluidized bed ash is the circulating fluidized bed ash loaded with sulfur-loaded diatomite, including 2.5 parts of circulating fluidized bed ash, 1 part of diatomite and 0.5 parts of s...

Embodiment 2

[0046] This embodiment is basically the same as Embodiment 1, the difference lies in that the proportion of the components of the wear-resistant repairing material is different.

[0047] A wear-resistant repair material for a CFB circulating fluidized bed boiler, comprising 45 parts by weight of brown corundum powder, 3 parts of modified circulating fluidized bed ash, 1.5 parts of aluminum dihydrogen phosphate cement, 0.8 parts of explosion-proof fiber, ceramic 0.6 parts of fiber, 0.2 parts of dispersant, 2 parts of zirconium dioxide powder, 2.5 parts of yttrium oxide powder, and 0.8 part of titanium diboride powder.

Embodiment 3

[0049] This embodiment is basically the same as Embodiment 1, the difference lies in that the proportion of the components of the wear-resistant repairing material is different.

[0050] A wear-resistant repair material for a CFB circulating fluidized bed boiler, comprising 50 parts by weight of brown corundum powder, 5 parts of modified circulating fluidized bed ash, 2 parts of aluminum dihydrogen phosphate cement, 1 part of explosion-proof fiber, ceramic 0.9 parts of fiber, 0.5 parts of dispersant, 2-3 parts of zirconium dioxide powder, 2.5-4 parts of yttrium oxide powder, and 0.8-1.5 parts of titanium diboride powder.

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Abstract

The invention discloses a wear-resistant repair material for a CFB boiler and a preparation method of the wear-resistant repair material. The wear-resistant repairing material is prepared from the following components in parts by weight: 45 to 50 parts of brown fused alumina powder, 3 to 5 parts of modified circulating fluidized bed ash, 1.5 to 2 parts of aluminum dihydrogen phosphate cementing agent, 0.8 to 1 part of explosion-proof fiber, 0.6 to 0.9 part of ceramic fiber, 0.2 to 0.5 part of dispersing agent, 2 to 3 parts of zirconium dioxide powder, 2.5 to 4 parts of yttrium oxide powder and 0.8 to 1.5 parts of titanium diboride powder. The preparation method comprises the following steps of: S1, preparing materials; S2, mixing powder; S3, carrying out pulping; and S4, carrying out roasting. The wear-resistant repair material for the CFB boiler has good wear resistance at a high temperature, is suitable for large-area repair and replacement of a dense-phase region of a hearth and the like, can also repair parts with complex structures of a water-cooling air chamber, can adopt an edited smearing repair method, and prolongs the service life of a CFB.

Description

technical field [0001] The invention relates to the technical field of preparation of wear-resistant materials, in particular to a wear-resistant repair material for CFB circulating fluidized bed boilers and a preparation method thereof. Background technique [0002] Circulating fluidized bed (CFB) is a high-efficiency, low-pollution clean coal combustion technology. The circulating fluidized bed boiler adopts fluidized combustion. The main structure includes a combustion chamber (including dense phase area and dilute phase area) and a circulating furnace ( Including high-temperature gas-solid separator and return system) two parts. It has the advantages of wide fuel adaptability, good environmental performance and flexible load regulation, and has been widely used in recent years. During use, due to its structural characteristics and special combustion methods, the circulating fluidized bed has a large amount of high-temperature solid particle materials produced by the cir...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/101C04B35/622
CPCC04B35/80C04B35/101C04B35/62204C04B2235/3244C04B2235/3225C04B2235/3813C04B2235/447C04B2235/96C04B2235/9607
Inventor 张晟张卫星王晓杰许英李业清吴俊杰裴一新方贤斌
Owner 宜兴市兴贝耐火保温工程有限公司
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