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Corrosion-resistant mullite refractory brick and preparation method thereof

A technology for refractory bricks and mullite, which is applied in the field of corrosion-resistant mullite refractory bricks and their preparation, can solve the problems of rising energy costs, aggravation, and rising thermal conductivity of refractory materials.

Inactive Publication Date: 2018-04-24
HENAN HAINADE NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The commonly used refractory castables are mainly Al 2 o 3 -SiO 2 However, when this type of refractory material is used in petrochemical and other industries, due to the influence of the reducing atmosphere environment, the damage of the refractory material will be aggravated, thereby reducing the service life of the material
In addition, due to the large size of pores in traditional refractory aggregates, the pore diameters are mostly at the millimeter level, so when the material is used in a high temperature environment, due to the intensification of radiation heat transfer and convective heat transfer through the gas in the pores, the refractory material will The thermal conductivity of the refractory increases, which in turn reduces the heat insulation effect of the refractory material, increases the loss of heat energy, and leads to an increase in energy costs

Method used

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  • Corrosion-resistant mullite refractory brick and preparation method thereof
  • Corrosion-resistant mullite refractory brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a corrosion-resistant mullite refractory brick, including a refractory brick base and a high-temperature-resistant coating sprayed on the surface of the refractory brick base; wherein, the preparation raw materials for the refractory brick base include: large particles of mullite 31%, hollow glass microspheres 18%, superfine metakaolin powder 5%, titanium dioxide 13%, polyvinyl alcohol aqueous solution 0.5%, fly ash 10%, diatomite 5.5%, calcium carbonate 6%, pulp water 11% %. The raw materials for the preparation of the high temperature resistant coating include: polysiloxane 35%, Mo powder 10%, polyborosilazane 33%, ethanol 22%.

[0026] Wherein, the particle size of the large mullite particles is 1 mm to 3 mm, the particle size of the hollow glass microspheres is 0.5 mm to 1 mm, the particle size of the ultrafine metakaolin powder is less than 0.043 mm, and the particle size of the diatomite is Less than 0.074mm. The chemical composition of ...

Embodiment 2

[0033] This embodiment provides a corrosion-resistant mullite refractory brick, including a refractory brick base and a high-temperature-resistant coating sprayed on the surface of the refractory brick base; wherein, the refractory brick base includes the following materials in mass percentage: mullite 29% large stone particles, 15% hollow glass microspheres, 3% metakaolin superfine powder, 18% titanium dioxide, 1.5% polyvinyl alcohol aqueous solution, 8.5% fly ash, 8% diatomaceous earth, 6% calcium carbonate, Pulp water 11%. The raw materials of the high-temperature-resistant coating include: 22% polysiloxane, 3% Mo powder, 30% polyborosilazane, and 45% ethanol.

[0034] The preparation method of the corrosion-resistant mullite refractory brick described in this example is the same as that in Example 1. After testing, the density of the corrosion-resistant mullite refractory brick prepared in this embodiment is 1.8g / cm 3 .

Embodiment 3

[0036] This embodiment provides a corrosion-resistant mullite refractory brick, including a refractory brick base and a high-temperature-resistant coating sprayed on the surface of the refractory brick base; wherein, the raw materials of the refractory brick base include: large mullite particles 28.5 %, hollow glass microspheres 15%, metakaolin superfine powder 5%, titanium dioxide 9%, polyvinyl alcohol aqueous solution 1.5%, fly ash 8%, diatomite 10%, calcium carbonate 11%, pulp water 12% ; The raw materials of the high temperature resistant coating include: polysiloxane 35%, Mo powder 10%, polyborosilazane 38%, ethanol 17%.

[0037] The preparation method of the corrosion-resistant mullite refractory brick described in this embodiment and the preparation in Example 1

[0038] The method is the same. After testing, the corrosion-resistant mullite refractory bricks prepared in this example have a density of 2.1 g / cm 3 .

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Abstract

The invention provides a corrosion-resistant mullite refractory brick which comprises a refractory brick base and a high-temperature-resistant coating sprayed on the surface of the refractory brick base. The refractory brick base is prepared from the following raw materials: 27-31% of mullite large granule, 15-25% of hollow glass microsphere, 3-5% of metakaolin ultrafine powder, 10-18% of titaniumwhite, 0.5-1.5% of polyvinyl alcohol water solution, 5-10% of fly ash, 5-10% of diatomite, 6-11% of calcium carbonate and the balance of paper pulp water. The high-temperature-resistant coating is prepared from the following raw materials: 20-35% of polysiloxane, 30-38% of polyborosilazane, 3-10% of Mo powder and the balance of ethanol. The invention also provides a preparation method of the corrosion-resistant mullite refractory brick. The method is nitrogen in steps, and can easily implement automatic production.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a corrosion-resistant mullite refractory brick and a preparation method thereof. Background technique [0002] Refractory materials are widely used in metallurgy, petrochemical, glass and other high-temperature industries due to their good corrosion resistance to high-temperature media and their thermal insulation properties. As my country's emphasis on energy saving and consumption reduction continues to increase, more research and development has been done on lightweight refractory materials with good thermal insulation effects. Unshaped refractory materials have received special attention due to their advantages of convenient construction, low production cost, and good overall structure of the lining, among which refractory castables are the most widely used. [0003] The commonly used refractory castables are mainly Al 2 o 3 -SiO 2 However, when t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/185C04B38/10C04B41/87
CPCC04B35/66C04B35/185C04B38/10C04B41/5071C04B41/87C04B2235/3208C04B2235/3232C04B2235/3418C04B2235/349C04B2235/36C04B2235/77C04B2235/96C04B41/5057C04B41/5059C04B41/4539C04B41/0072C04B38/0054C04B38/0067
Inventor 张微微计富宝吉飞虎
Owner HENAN HAINADE NEW MATERIAL CO LTD
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