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A kind of preparation method of hardening insulation material for high temperature furnace

A thermal insulation material and high-temperature furnace technology, applied in the field of thermal insulation materials, can solve problems such as low strength, high thermal conductivity, and easy deformation, and achieve the effects of high process stability, low thermal conductivity, and high mechanical strength

Active Publication Date: 2019-01-29
XIAN CHAOMA SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the thermal insulation materials currently used are soft felt insulation materials, which have disadvantages such as low hardness, easy pulverization, inconvenient installation and disassembly, and poor thermal insulation performance. Short fiber hardened thermal insulation materials can overcome the above-mentioned disadvantages of soft felt insulation materials. Disadvantages, can be widely used in various high-temperature furnace insulation fields
[0003] At present, the thermal insulation materials used in domestic vacuum high-temperature furnaces generally use soft carbon felt. The thermal insulation materials of this structure have disadvantages such as low strength, easy deformation, easy weathering, poor thermal insulation effect, and time-consuming and laborious disassembly and installation. Short fiber Hardened thermal insulation materials can overcome the above-mentioned shortcomings of soft felt thermal insulation materials, and can be widely used as thermal insulation materials in high-temperature furnaces such as crystalline silicon high-temperature furnaces, vapor deposition furnaces, and ceramic sintering furnaces.
[0004] At present, domestic carbon fiber hard felt mainly adopts the forming process of soft felt impregnated and layered and pasted. Although the strength of the hard felt made by this process is higher than that of soft felt, it still has fatal shortcomings such as large thermal conductivity and poor thermal insulation performance.

Method used

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  • A kind of preparation method of hardening insulation material for high temperature furnace
  • A kind of preparation method of hardening insulation material for high temperature furnace

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Experimental program
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Effect test

Embodiment 1

[0027] The preparation method of the hardened insulation material for the high temperature furnace of this embodiment comprises the following steps:

[0028] Step 1, shearing the carbon fibers to obtain short fibers with a length of 1 mm and long fibers with a length of 20 mm, and then uniformly mixing the short fibers and long fibers at a mass ratio of 1:1 to obtain mixed fibers; the carbon fibers It is polyacrylonitrile-based carbon fiber;

[0029] Step 2, uniformly mixing the dispersant and water to obtain a dispersion; the mass percentage of the dispersant in the dispersion is 1%; the dispersant is methyl cellulose;

[0030] Step 3, uniformly mixing the mixed fiber described in step 1 and the dispersion liquid described in step 2 to obtain a slurry; the mass percentage of the mixed fiber in the slurry is 10%;

[0031] Step 4. Perform the first vacuum filtration molding on the slurry described in step 3 to obtain a blank, and then pour the binder on the blank, and perform ...

Embodiment 2

[0036] The preparation method of the hardened insulation material for the high temperature furnace of this embodiment comprises the following steps:

[0037] Step 1, shearing the carbon fibers to obtain short fibers with a length of 3 mm and long fibers with a length of 30 mm, and then uniformly mixing the short fibers and long fibers at a mass ratio of 3:1 to obtain mixed fibers; the carbon fibers Viscose-based carbon fiber;

[0038] Step 2, uniformly mixing the dispersant and water to obtain a dispersion; the mass percentage of the dispersant in the dispersion is 1.5%; the dispersant is carboxymethyl cellulose;

[0039] Step 3, uniformly mixing the mixed fiber described in step 1 and the dispersion liquid described in step 2 to obtain a slurry; the mass percentage of the mixed fiber in the slurry is 10%;

[0040] Step 4. Perform the first vacuum filtration molding on the slurry described in step 3 to obtain a blank, and then pour the binder on the blank, and perform the sec...

Embodiment 3

[0045] The preparation method of the hardened insulation material for the high temperature furnace of this embodiment comprises the following steps:

[0046] Step 1, shearing the carbon fibers to obtain short fibers with a length of 0.5 mm and long fibers with a length of 10 mm, and then uniformly mixing the short fibers and long fibers at a mass ratio of 4:1 to obtain mixed fibers; The carbon fiber is pitch-based carbon fiber;

[0047] Step 2, uniformly mixing the dispersant and water to obtain a dispersion; the mass percentage of the dispersant in the dispersion is 0.5%; the dispersant is hydroxypropyl methylcellulose;

[0048] Step 3, uniformly mixing the mixed fiber described in step 1 and the dispersion liquid described in step 2 to obtain a slurry; the mass percentage of the mixed fiber in the slurry is 8%;

[0049] Step 4. Perform the first vacuum filtration molding on the slurry described in step 3 to obtain a blank, and then pour the binder on the blank, and perform ...

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Abstract

The present invention provides a preparation method of a high-temperature furnace hardening insulation material, and the method comprises the following steps: first, cutting carbon fiber to obtain short fiber and long fiber, and evenly mixing the short fiber and the long fiber to obtain mixed fiber; second, evenly mixing a dispersant and water to obtain a dispersion liquid; third, evenly mixing the liquid dispersion and the mixed fiber to obtain a slurry; fourth, molding the slurry by first vacuum suction filtration to obtain a blank material, pouring an adhesive onto the blank material, and molding the blank material by second vacuum suction filtration to obtain a molded product; fifth, curing; sixth, performing carbonization-high temperature treatment to obtain the high-temperature furnace hardening insulation material. The high-temperature furnace hardening insulation material prepared by the method has low density, low thermal conductivity, high mechanical strength and other characteristics, can be widely used as an insulation material in crystalline silicon high-temperature furnaces, vapor deposition furnaces, ceramic sintering furnaces and other high temperature furnaces.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation materials, and in particular relates to a method for preparing hardened thermal insulation materials for high-temperature furnaces. Background technique [0002] With the development of science and technology, the demand for thermal insulation materials in various fields of national economy such as military, national defense, metallurgy, and chemical industry is increasing day by day, and the performance requirements for thermal insulation materials are getting higher and higher. Most of the thermal insulation materials currently used are soft felt insulation materials, which have disadvantages such as low hardness, easy pulverization, inconvenient installation and disassembly, and poor thermal insulation performance. Short fiber hardened thermal insulation materials can overcome the above-mentioned disadvantages of soft felt insulation materials. It can be widely used in various high-t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/83C04B35/524C04B35/622
CPCC04B35/524C04B35/622C04B2235/48C04B2235/5212C04B2235/5248C04B2235/9607C04B2235/77
Inventor 张旭辉侯卫权彭志刚杨万利张灵玉樊振宁
Owner XIAN CHAOMA SCI TECH