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High temperature furnace-grade curing carbon fiber thermal insulating material and production technology thereof

A thermal insulation material and production process technology, applied in carbon fiber, fiber treatment, furnace lining, etc., can solve the problems of complex process, impurities brought into the green body, long cycle, etc., and achieve the effect of energy saving and environmental protection, stable structure and strong cohesion

Active Publication Date: 2009-10-07
HUNAN KINGBO CARBON CARBON COMPOSITES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, before the chemical vapor phase pre-deposition is carried out on the green body, the high-temperature pretreatment of the green body material must be carried out; then the high-temperature pretreated felt body is made into a green body, and then the green body is solidified and shaped and carbonized. The process is more complicated, the cycle is longer, and impurities may also be brought into the green body during the process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A production process of a solidified carbon fiber insulation material for a high-temperature furnace, comprising the following steps:

[0024] (1) Preform preparation:

[0025] ① Opening into a web: select short carbon fibers with a length of 6mm-70mm (15mm-50mm in this embodiment), and open them into fluffy needle-like fibers through an opening device, and then air-laid and / or air-laid the opened carbon fibers Or combing into a net (the present embodiment is air-laid and carded into a net), and then utilizes a web-laying machine to pave a fiber web, and pre-punches into a mesh tire; the surface density of the mesh tire is 30g / m 2 -130g / m 2 (the present embodiment is 90g / m 2 ).

[0026] ② Lamination and compounding: according to the required requirements, the net tire obtained is compounded by acupuncture to make a prefabricated body such as a plate, a strip or a cylinder (this embodiment is a cylinder); the depth of acupuncture is 6mm-25mm (15mm in this example); a...

Embodiment 2

[0033] In the present invention, in step (1) laminated composite, a plate-shaped prefabricated body is made, and its apparent density is 0.18g / cm 3 , the apparent density after densification is 0.39g / cm 3 ,

[0034]In the present invention, in order to prevent the obtained solidified carbon fiber thermal insulation material plate from falling ash, and to increase its anti-corrosion and anti-scouring capabilities, the surface treatment of step (5) is carried out, that is, the product obtained in step (4) is subjected to chemical vapor deposition treatment, so that the surface of the product Form a layer of deposited carbon with a thickness of 10mm-50mm (this embodiment is ), the temperature is 1100°C-1300°C (this embodiment is 1200°C), and the time is 5 hours-30 hours (this embodiment is 25 hours). In order to remove impurities that may be brought in during the machining process, step (6) purification is carried out, that is, the product obtained in step (5) is purified under ...

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Abstract

The invention discloses a high temperature furnace-grade curing carbon fiber thermal insulating material having simple technology and small coefficient of heat conductivity, and a production technology thereof, characterized in that the material is made of the carbon fiber by the steps of the preparation of a preform, densification, hot-vibration purification and machine processing; the invention is free from the processes of bonding, immersion, curing and charring in the preparation of the preform and has simple technology, great energy-saving property and environmental protection ability, the carbon fibers inside the preform are distributed in a crisscross pattern, strong in cohesive force, stable in structure and free from delamination, the coefficient of heat conductivity is not larger than 0.8 W / mK and the thermal insulating property is excellent; the product consists of the high-strength carbon fiber and carbon matrix and has outstanding performances such as high specific strength, good high temperature resistance, corrosion resistance and thermal insulating property, in addition, the product integrates the fire resistance and the thermal insulating property, can bear certain loads, and is an ideal upgraded product in taking the place of related high temperature furnace-grade graphite products and soft carbon felt.

Description

Technical field: [0001] The invention relates to an insulating material for a high-temperature furnace, in particular to a solidified carbon fiber insulating material for a high-temperature furnace and a production process thereof. Background technique: [0002] When the single crystal furnace, polycrystalline silicon ingot furnace and powder metallurgy sintering furnace are working, the maximum temperature in the furnace is above 1600°C. In order to reduce heat loss, reduce energy consumption, and ensure that the temperature in the furnace meets the process requirements, it is inseparable from high temperature resistance and The refractory insulation material with good thermal insulation performance is used as the furnace lining. At present, for example, the lining of single crystal furnaces is generally composed of graphite products and soft carbon felt. The soft carbon felt is wrapped on a cylindrical graphite tube, and then fastened with molybdenum wire; Carbon felt, co...

Claims

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Application Information

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IPC IPC(8): C04B35/66
CPCD04H1/4242C04B2235/616C04B2235/612C04B2235/9607C04B2235/526D04H1/46C04B35/83D04H1/498C04B35/66F27D1/0009D06M11/74D06M2101/40
Inventor 廖寄乔邰卫平王跃军龚玉良
Owner HUNAN KINGBO CARBON CARBON COMPOSITES CO LTD
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