Recycling method of scraps of graphite board and paper

Abstract

The invention relates to recycling and reuse of graphite wastes, and in particular to a method for recycling and reusing margin and corner scraps of graphite plates and paper to produce low-sulfur ultra-thin graphite paper. The method for recycling and reusing the margin and corner scraps of the graphite plates and the paper comprises the following steps: I, performing primary crushing on a graphite margin and corner material by using a universal crushing machine, wherein the crushing granules are smaller than 3mm; II, further crushing granules less than 3mm into powder of which the particle size is less than 45[mu] m in a fine steam crushing manner; III, uniformly mixing the powder with an adhesive and expanded graphite in a ratio; IV, performing thermal treatment on the mixed powder of the step III at 900-1050 DEG C, thereby obtaining ultra-thin graphite paper and various graphite products.

Description

technical field [0001] The invention relates to the recycling of graphite waste, in particular to the recycling of graphite board and paper corner waste. Background technique [0002] Flexible graphite sheet (paper) is made of high-purity flake graphite, which is chemically treated and expanded at high temperature to make a coil. It has high temperature resistance, corrosion resistance, and excellent resilience. It is an ideal material commonly used in high-strength graphite sheets, graphite strips, packing and other sealing gaskets. Main purpose: to make ultra-thin graphite paper, various graphite strips, fillers, gaskets, reinforced plates, cylinder sheets, fuel cells, heat sinks, conductive sheets, buffer pads, shielding plates, etc. [0003] Graphite resources have become a non-renewable strategic resource for the country. The state's control over graphite resources is manifested in the increase of tariffs on exports, the intensification of crackdowns on mining, the pr...

AI Technical Summary

Problems solved by technology

The state's control over graphite resources is manifested in the increase of tariffs on exports, the intensification of crackdowns on mining, the prohibition of production without a license or incomplete license, the establishment of a mining company and unified management of the mining company to protect this rich and non-renewable resource. Therefore, In order to effectively utilize these scraps of graphite paper and recycle them, it is a problem that the industry is committed to solving. During the production process, there are many scraps that are cut according to needs, and these scraps are usually recycled uniformly. As a filler or used in combination with other materials, the market recovery price is generally only about 3,000 yuan, and the scope of use is also greatly limited.

[0004] In addition, flexible graphite sheets on the market have a high sulfur content, generally around 1200ppm, with a tensile strength of 7MPa, a compressive strength of 80MPa, a rebound rate of 30%, and a compression rate of 15%. In some high-end fields, For example, atomic energy, nuclear energy, aerospace, etc. need high-performance materials with higher corrosion resistance, higher compressive strength, tensile strength, better rebound rate and compression rate, and it is very difficult to produce such high-performance materials in the existing industry. less, which also limits its field of application