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Ultra-fine carbon fiber crushing process and device

A technology of ultra-fine carbon fiber and pulverizing device, which is applied in the direction of grain processing, etc., can solve the problems of waste backlog and environmental pollution.

Pending Publication Date: 2020-04-17
吉林市圣赢碳纤维制品科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation process of carbon fiber composite materials, due to various limitations of processing technology, there is often a backlog of waste materials of various carbon fiber felts, carbon fiber fabrics or carbon fiber chopped strands. , landfill and other conventional treatment methods will bring serious environmental pollution

Method used

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  • Ultra-fine carbon fiber crushing process and device
  • Ultra-fine carbon fiber crushing process and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Put the pretreated carbon fiber single-layer network tire waste into the vacuum feeding hopper, and suck the pretreated raw materials into the vacuum feeding hopper through the vacuum driving force of -0.06MPa, and the vacuum feeding hopper and the low-temperature treatment chamber are connected by a pipeline connect. The pretreated raw materials are subjected to cooling and embrittlement treatment in a low-temperature treatment chamber connected with a circulating liquid nitrogen pipeline at a temperature of -60. The cooled and brittle carbon fiber enters the multi-stage high-speed rotary cutting chamber, and the carbon fiber pretreatment material is cut at a line speed of 5m / s by two sets of high-speed rotary knives rotating clockwise, and the cut carbon fiber is sucked into the air by negative pressure. In the winnowing room, high-pressure air is blown into the airflow winnowing room through a pressure of 0.5MPa, and the pulverized carbon fibers in the room are forme...

Embodiment 2

[0048] The pretreated carbon fiber felt waste is loaded into the vacuum feed hopper, and the pretreated raw material is sucked into the vacuum feed hopper by a vacuum driving force of -0.1MPa, and the vacuum feed hopper is connected to the low-temperature processing chamber through a pipeline. The pretreated raw materials are cooled and embrittled in a low-temperature treatment room connected with a circulating liquid nitrogen pipeline at a temperature of -75°C. The cooled and embrittled carbon fiber enters the multi-stage high-speed rotary cutting chamber, and the carbon fiber pretreated material is cut at a line speed of 15m / s by combining two sets of high-speed rotary knives that rotate in reverse, and the cut carbon fiber is driven by negative pressure. Inhale the airflow winnowing chamber, blow high-pressure air into the airflow winnowing chamber through 2MPa pressure, form the carbon fiber pulverized in the chamber into a suspended state, and sieve the cut carbon fiber th...

Embodiment 3

[0050] Put the pretreated chopped carbon fiber waste into the vacuum feed hopper, and suck the pretreated raw materials into the vacuum feed hopper through the vacuum driving force of -0.1MPa, where the vacuum feed hopper is connected to the low temperature treatment chamber through a pipeline . The pretreated raw materials are cooled and embrittled in a low-temperature treatment room connected with a circulating liquid nitrogen pipeline at a temperature of -65°C. The cooled and brittle carbon fiber enters the multi-stage high-speed rotary cutting chamber, and the carbon fiber pretreated material is cut at a line speed of 10m / s by two sets of high-speed rotary knives rotating counterclockwise, and the cut carbon fiber is sucked into the air by negative pressure. Air selection room, blowing high-pressure air into the air flow selection room through 1MPa pressure, forming the suspended carbon fiber in the room, and screening the cut carbon fiber through a sieving plate with a po...

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Abstract

The invention provides an ultra-fine carbon fiber crushing process. The ultra-fine carbon fiber crushing process includes the following steps that carbon fiber waste is sequentially subjected to low temperature treatment, multi-stage high-speed rotary cutting, air flow air separation and ball milling to obtain ultra-fine carbon fibers; the temperature of the low temperature treatment is -60-75 DEGC; and the time of the low temperature treatment is 5-10min. Before the carbon fiber waste is crushed, the carbon fiber waste is first subjected to low-temperature embrittlement treatment, so that after subsequent crushing and grinding processes, the carbon fibers with a smaller particle size can be obtained, and the performance of the carbon fibers is not changed. Experimental results show thatthe particle size of the ultra-fine carbon fibers obtained by the ultra-fine carbon fiber crushing process is 1-5 [mu]m. The invention further provides a crushing device of the ultra-fine carbon fibers.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber secondary recovery, and in particular relates to an ultrafine carbon fiber crushing process and a crushing device. Background technique [0002] Carbon fiber and its composite materials are widely used in lightweight, high-strength and high-modulus structural materials due to their excellent mechanical properties. Carbon fiber, the matrix used is often a thermosetting resin adhesive. In the preparation process of carbon fiber composite materials, due to various limitations of processing technology, there is often a backlog of waste materials of various carbon fiber felts, carbon fiber fabrics or carbon fiber chopped strands. Conventional treatment methods such as burying and burying will bring serious environmental pollution. [0003] In recent years, a large number of experimental studies have been carried out on the recycling technology of carbon fiber waste at home and abroad, and a vari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C21/00B02C19/18B02C23/18
CPCB02C21/00B02C19/186B02C23/18
Inventor 张丽珠肖宇张强丁芳笑
Owner 吉林市圣赢碳纤维制品科技有限公司
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