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Method for preparing work hardening insulation quilt for high temperature furnace

A technology of work hardening and thermal insulation felt, which is applied in the field of thermal field material accessories for high temperature furnaces, can solve the problems of low mechanical strength of foamed carbon and poor product machinability, and achieves enhanced machinability and reduced chemical vapor infiltration densification process. , the effect of good mechanical properties

Active Publication Date: 2012-12-12
XIAN CHAOMA SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the high-purity solidified carbon felt, solidified carbon felt or solidified foamed carbon heat insulation materials mentioned in the above-mentioned patents are all molded by means of molds or molds, and the product processability is not strong; The prepared foamed carbon has low mechanical strength; the crucible insulation sleeve molding technology is limited to the insulation material for single crystal silicon furnaces, which has certain limitations for other fields

Method used

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  • Method for preparing work hardening insulation quilt for high temperature furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Adopt polyacrylonitrile-based carbon felt with an ash content of 1800ppm, cut the polyacrylonitrile-based carbon felt to a width of 200mm, and pre-impregnate with a mixed glue of alcohol and aminophenol-formaldehyde resin with a mass ratio of 2:1, impregnate The amount of agent used is to submerge the soft felt; then dry the pre-impregnated soft felt for 5 hours;

[0028] (2) brush bonding agent on the soft felt after drying to bond soft felt, and bonding agent is the mixture of phenolic resin and graphite powder that mass ratio is 10: 0.5;

[0029] (3) Press and solidify the bonded soft felt at a temperature of 140° C. and a pressure of 0.01 MPa to obtain a semi-finished product;

[0030] (4) The semi-finished product is placed in a carbonization furnace, and the temperature is raised to 700°C under the condition of a heating rate of 5°C / h for carbonization treatment;

[0031] (5) Place the carbonized product in a high-temperature heat treatment furnace, and heat ...

Embodiment 2

[0036] The preparation process of this embodiment is the same as that of Example 1, except that the mass ratio of the coating material used is phenolic resin: alcohol: graphite powder = 2: 1: 1, and the thermal conductivity of the machinable hardening insulation felt is It is 0.47W / m·K, and the ash content is 600ppm.

Embodiment 3

[0038] The preparation process of this embodiment is the same as that of Example 1, except that the mass ratio of the coating material used is phenolic resin: alcohol: graphite powder = 10: 5: 1, and the thermal conductivity of the processed hardening insulation felt is It is 0.40W / m·K, and the ash content is 1100ppm.

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Abstract

The invention relates to a method for preparing a work hardening insulation quilt for a high temperature furnace, which comprises the following steps of: 1, cutting, pre-impregnating and airing a soft quilt; 2, adhering the soft quilt by using an adhesive; 3, pressing and curing for forming; 4, performing carbonization treatment; 5, performing high temperature treatment; 6, machining; 7, performing coating treatment; and 8, performing chemical vapor deposition treatment and high temperature treatment, or directly performing high temperature treatment to obtain the work hardening insulation quilt for the high temperature furnace. The method has the advantages of simple technological process and suitability for mass production; and the prepared work hardening insulation quilt has the heat conductivity of less than or equal to 0.5W / m.K, the ash content of less than or equal to 2,000ppm, high mechanical properties and high-temperature dimensional stability and excellent processability, does not generate volatile matters when used in the high temperature furnace, cannot pollute the product, and has important significance for prolonging the service life of the insulation quilt in the high temperature furnace.

Description

technical field [0001] The invention belongs to the technical field of thermal field material accessories for high-temperature furnaces, and in particular relates to a preparation method of a machinable hardening insulation felt for high-temperature furnaces. Background technique [0002] As one of the commonly used equipment in the fields of powder metallurgy, new materials, new energy, and national defense industry, high-temperature furnaces are widely used. Thermal field materials for high-temperature furnaces have dual functions of function and structure. As consumable parts, the annual consumption is huge. In recent years, due to the progress in the preparation technology of carbon / carbon composite materials and their excellent mechanical properties, thermal insulation properties, corrosion resistance, and air erosion resistance, the thermal field materials for high-temperature furnaces have gradually shifted from graphite materials to carbon / carbon composite materials....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/83
Inventor 邵海成胡振英侯卫权肖志超苏君明
Owner XIAN CHAOMA SCI TECH
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