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Graphite composite fire resistant material

A technology of refractory materials and refractory aggregates, applied in the field of refractory materials, can solve the problems of high temperature resistance and thermal shock resistance reduction, and achieve the effect of reducing side effects and remarkable effects

Inactive Publication Date: 2014-04-30
江苏苏嘉集团新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the high temperature resistance and thermal shock resistance of the refractory due to the addition of antioxidants in graphite composite refractory materials, and provide a new type of graphite composite refractory material coated with antioxidants on the graphite surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Step 1: Preparation method of surface-coated graphite: Take 1000 liters of resole phenolic resin aqueous solution (80% water content, the rest is resole phenolic resin), add -197 graphite 100kg, 1000 mesh boron carbide 1kg, stir and filter. Add the filtered solid into a hot air dryer and dry it to harden the resole phenolic resin to obtain surface-coated graphite.

[0019] Step 2: Mix 72.5 parts of fused magnesia, 15 parts of magnesia-aluminum spinel, 10 parts of coated graphite and 2.5 parts of phenolic resin binder to obtain mud, then add the mud to the mold and press to form the brick and bake it Magnesia carbon bricks can be made by roasting and hardening.

[0020] Compared with traditional products, the magnesia-alumina-carbon brick has a lower boron carbide content, and the boron carbide covers the graphite, which can more effectively prevent the graphite from being oxidized. Boron carbide is not in direct contact with magnesia. Magnesium borate with low melting...

Embodiment 2

[0024] Step 1: The preparation method of surface-coated graphite: take 500 liters of ethanol solution of resole phenolic resin (containing 80% ethanol, the rest is resole phenolic resin), add -197 graphite 100kg, 400 mesh aluminum powder 15kg, 325 mesh 5kg of aluminum-magnesium alloy and 5kg of 325-mesh aluminum-zinc alloy are stirred and then filtered. Add the filtered solid into a hot air dryer and dry it to harden the resole phenolic resin to obtain surface-coated graphite.

[0025] Step 2: Mix 65 parts of fused magnesia, 30 parts of coated graphite and 5 parts of furfural resin binder to obtain mud material, add the mud material into the mold, pressurize and form the adobe, bake and harden to obtain the magnesia carbon brick .

[0026] Compared with traditional magnesia carbon bricks, this product is covered with antioxidants around graphite, which can more effectively prevent graphite from being oxidized. Aluminum is not in direct contact with magnesia, the high tempera...

Embodiment 3

[0030] Step 1: The preparation method of surface-coated graphite: take 1000 liters of ethanol solution of furfural resin (70% of which contains ethanol, and the rest is furfural resin), add 100 kg of 96% pure graphite of 100 mesh, 15 kg of silicon carbide of 800 mesh, and 1000 mesh of silicon carbide 30kg of aluminum-silicon alloy is stirred and filtered. Put the filtered solid into a hot air dryer and dry it to harden the furfural resin to obtain surface-coated graphite.

[0031] Step 2: 90 parts of tabular alumina (the main chemical composition is Al 2 o 3 ), 5 parts of zirconia, 2 parts of coated graphite and 3 parts of phenolic resin binder are mixed to obtain a mud material, and then the mud material is added to a mold and pressurized to obtain a brick, which can be baked and hardened to obtain an aluminum-zirconium carbon brick .

[0032] Compared with traditional products, the aluminum-zirconium carbon brick is covered with antioxidants, which effectively prevents gr...

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PUM

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Abstract

The invention relates to a graphite composite fire resistant material which comprises the following components in parts by weight: 2-30 parts of surface coated graphite, 65-95 parts of a fire resistant aggregate and 2.5-5 parts of a binder. The fire resistant aggregate is one or more of magnesite, aluminum oxide corundum, zirconium oxide, magnesium aluminate spinel and silicon carbide. The binder is phenolic resin or furfural resin. According to the graphite composite fire resistant material provided by the invention, the surface of graphite is coated with an antioxidant, so that the antioxidant effect is remarkable. The antioxidant is separated from the fire resistant aggregate and is not directly contacted with the fire resistant aggregate, so that low-melting-point products cannot be produced easily at high temperatures, so that the high temperature resistance of the fire resistant material is improved.

Description

technical field [0001] The invention relates to a graphite composite refractory material and a preparation method thereof, belonging to the technical field of refractory materials. Background technique [0002] Carbon composite refractory material is a multiphase composite refractory material made of two or more refractory oxides with different properties, carbon materials and non-oxide materials as raw materials, and carbon-containing organic matter as a binder. The oxides used are mainly MgO, Al 2 o 3 , ZrO 2 and MgAl 2 o 4 , Carbon is mainly natural graphite, non-oxides are mainly Al, Si, Mg and other metals, AlSi, AlMg alloys and SiC, B 4 Compounds such as C, and then shaped by adding binders such as resin or pitch, can obtain composite refractory materials composed of oxides, carbon, non-oxygen compounds and binders. [0003] The melting point of graphite exceeds 3500°C, and the coefficient of thermal expansion is relatively low. Graphite and MgO Al 2 o 3 ZrO 2...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 张雪松俞晓东
Owner 江苏苏嘉集团新材料有限公司
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