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Method for preparing high-performance composite carbon-fiber heat-insulating cylinder

A technology of composite carbon fiber and a manufacturing method, which is applied in the field of making heat preservation cylinders for high-temperature furnaces, can solve the problems of low strength of carbon fiber hard felt, high binder content, poor oxidation resistance, etc. good support effect

Active Publication Date: 2017-05-31
辽宁奥亿达新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon fiber hard felt produced by the dipping molding process has the disadvantages of high energy consumption, low strength between layers of carbon fiber hard felt, easy cracking, low service life, high binder content, and poor oxidation resistance.

Method used

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  • Method for preparing high-performance composite carbon-fiber heat-insulating cylinder
  • Method for preparing high-performance composite carbon-fiber heat-insulating cylinder
  • Method for preparing high-performance composite carbon-fiber heat-insulating cylinder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] In the present embodiment, the manufacturing method of the high-performance composite carbon fiber insulation cylinder is as follows:

[0072] 1) Prepare chopped carbon fibers; chop the pitch-based carbon fibers to obtain chopped carbon fibers with an average length of 40 mm;

[0073] 2) preparing ground carbon fibers; grinding the pitch-based carbon fibers to obtain ground carbon fibers with an average length of 100 μm;

[0074] 3) using a cyclone separator to fully mix the chopped carbon fiber and the ground carbon fiber according to the weight ratio of 60:40 to obtain the mixed carbon fiber;

[0075] 4) Mix the mixed carbon fiber with the organic binder phenolic resin and solvent ethanol in a weight ratio of 100:30:70 to obtain a carbon fiber mixture; put the carbon fiber mixture into a mesh bag, pass through a mesh with a mesh size of 30 μm After the initial filtration of the bag, use hot air at 50°C to blow directly into the mesh bag for 30 minutes to completely v...

Embodiment 2

[0084] In order to increase the anti-airflow erosion and anti-oxidation performance of the composite carbon fiber insulation cylinder 9, and further improve its service life; the composite carbon fiber insulation cylinder 9 prepared in [Example 1] is subjected to surface treatment, and the specific steps of surface treatment are as follows:

[0085] 1) The composite carbon fiber insulation cylinder 9 is machined for surface polishing to make the surface smooth;

[0086] 2) Brush the adhesive agent on the inner and outer surfaces of the composite carbon fiber insulation cylinder 9 after the surface polishing treatment for 3 to 6 times to form the adhesive layer 10, and the adhesive agent used conventionally can be used as the adhesive agent;

[0087] 3) Put the composite carbon fiber insulation cylinder 9 coated with the adhesive layer 10 into a heating furnace, raise the temperature to 240° C. at a heating rate of 5° C. / min, keep the temperature at this temperature for 1 hour, an...

Embodiment 3

[0090] In the present embodiment, the manufacturing method of the high-performance composite carbon fiber insulation cylinder is as follows:

[0091] 1) Prepare chopped carbon fibers; chop the pitch-based carbon fibers to obtain chopped carbon fibers with an average length of 80 mm;

[0092] 2) preparing ground carbon fibers; grinding the pitch-based carbon fibers to obtain ground carbon fibers with an average length of 180 μm;

[0093] 3) Using a cyclone separator to fully mix the chopped carbon fiber and the ground carbon fiber according to the weight ratio of 50:50 to obtain the mixed carbon fiber;

[0094] 4) Mix the mixed carbon fiber with the organic binder phenolic resin and solvent ethanol in a weight ratio of 100:55:75 to obtain a carbon fiber mixture; put the carbon fiber mixture into a mesh bag, pass through a mesh with a mesh size of 30 μm After the bag is pre-filtered, hot air at 60°C is blown directly into the mesh bag for 30 minutes to completely evaporate the ...

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Abstract

The invention relates to a method for preparing a high-performance composite carbon-fiber heat-insulating cylinder. The method comprises the following steps: mixing mixed carbon fibers consisting of staple carbon fibers and ground carbon fibers with an organic binder and a solvent, then, removing the solvent from the mixture, mixing composite carbon fibers, of which surfaces are coated with the organic binder, with water and a dispersant so as to form a carbon-fiber size mixture, and carrying out vacuum-suction forming, so as to prepare a composite carbon-fiber heat-insulating cylinder prefabricated product; dehydrating the composite carbon-fiber heat-insulating cylinder prefabricated product in a hot steam or hot air heating manner, and completing infusible and insoluble treatment; then, carrying out carbonizing or graphitizing treatment, thereby obtaining the finished composite carbon-fiber heat-insulating cylinder. The composite carbon-fiber heat-insulating cylinder prepared by the method has the characteristics of good heat-insulating property, good oxidation resistance, low heat capacity and high strength, and is low-cost, controllable in finished product form and size and adjustable in density, and the production process is simple; the finished product is not prone to cracking and is good in self-supporting and long in service life; after surface treatment, the composite carbon-fiber heat-insulating cylinder can further have excellent oxidation resistance, and the service life of the composite carbon-fiber heat-insulating cylinder is further prolonged.

Description

technical field [0001] The invention relates to the technical field of manufacturing an insulating cylinder for a high-temperature furnace, in particular to a method for manufacturing a high-performance composite carbon fiber insulating cylinder. Background technique [0002] With the advancement of science and technology, military, national defense, solar energy, semiconductors, heat treatment and other fields are developing rapidly, and the development of these fields involves the use of thermal insulation materials; especially in recent years, the rapid development of solar energy and semiconductors, the demand for thermal insulation materials It is more prominent, and the requirements for thermal insulation materials are getting higher and higher, not only requiring energy saving and consumption reduction, but also requiring high oxidation resistance. These requirements are also continuously promoting the rapid development of the field of thermal insulation materials. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/622
CPCC04B35/622C04B35/83C04B2235/656C04B2235/9607C04B2235/77C04B2235/48C04B2235/526C04B2235/5272
Inventor 王红伟郑淑云陈惠龙朴成军
Owner 辽宁奥亿达新材料股份有限公司
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