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Soaking method for high-purity graphite multi-immersed product

A high-purity graphite and product technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as inconsistent internal structure, troublesome graphite quality, and ineffective effects

Active Publication Date: 2012-07-25
FIVE STAR NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the production process of high-purity graphite, carbon products are roasted multiple times, and impregnation is an indispensable process. The purpose is to improve the mechanical strength and density of carbon products, thereby improving the performance of carbon products. , due to repeated roasting of carbon products, the surface is dense and hard shells are formed. Within the scope of normal production process requirements, pitch cannot enter (or partially enter) carbon products, resulting in impermeability. After roasting, due to inconsistent internal structures , resulting in large-scale internal or external cracking of carbon products, especially large-scale hot-pressed products and fine-grained products with high pressure and cold-pressed molded products are prone to internal cracking
In order to solve this problem, the traditional production method is to add diluents, such as coal tar, anthracene oil about 30% to the asphalt. The effect is not obvious, and the quality has not changed greatly. This problem has been plagued by the improvement of graphite quality.

Method used

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  • Soaking method for high-purity graphite multi-immersed product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Put the roasted columnar carbon products on the disc, and automatically send them into the shot blasting chamber of the vertical disc shot blasting machine. Use high-pressure multi-directional spray iron shots to remove the 1 mm hard shell on the surface of the columnar carbon products, and then Weigh the carbon products with hard shells removed, put them into the iron basket and put them in the preheating furnace, preheat and keep them warm for 4.5 hours at 200°C; take out the preheated iron baskets, and put them into the impregnation tank within 15 minutes Medium; evacuate to -0.095MPA for 50 minutes; then add coal tar pitch at 180°C to the impregnation tank, keep it for 4.5 hours under the pressure of 1.5MPa, then hang out the iron basket within 15 minutes, put it in the temperature Cool in a cooling pool at 40°C for 3 hours, hang out and clean the asphalt on the surface, and then roast. During the roasting process, the temperature of the roasting is gradually raised ...

Embodiment 2

[0024] Put the roasted columnar carbon products on the disc, and automatically send them into the shot blasting chamber of the vertical disc shot blasting machine. Use high-pressure multi-directional spray iron shot to remove the 2 mm hard shell on the surface of the columnar carbon products, and then Weigh the carbon products with hard shells removed, put them into the iron basket and put them in the preheating furnace, preheat and keep them warm for 4.6 hours at 203°C; take out the preheated iron baskets, and put them into the impregnation tank within 15 minutes Medium; vacuumize to -0.095MPA in 53 minutes; then add coal tar pitch at 183°C to the dipping tank, keep it for 4.6 hours under the pressure of 1.6MPa, then hang out the iron basket within 15 minutes, put it in the temperature Cool in the cooling pool at 43°C for 3 hours, lift out the asphalt to clean the surface, impregnate and then roast, the temperature of roasting is gradually raised from room temperature to 550°C...

Embodiment 3

[0026] Put the roasted columnar carbon products on the disc, and automatically send them into the shot blasting chamber of the vertical disc shot blasting machine. Use high-pressure multi-directional spray iron shots to remove the 3 mm hard shell on the surface of the columnar carbon products, and then Weigh the carbon products with the hard shell removed and put them into the iron basket and put them in the preheating furnace, preheat and keep warm at 205°C for 4.7 hours; take out the preheated iron basket and put it into the impregnation tank within 15 minutes Medium; evacuate to -0.095MPA for 55 minutes; then add coal tar pitch at 185°C to the impregnation tank, keep it for 4.7 hours under the pressure of 1.7MPa, then hang out the iron basket within 15 minutes, put it in the temperature Cool in the cooling pool at 45°C for 3 hours, lift out the asphalt to clean the surface, impregnate and then roast, the temperature of roasting is gradually raised from room temperature to 60...

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Abstract

The invention relates to the production field of the graphite material, in particular to a soaking method for a high-purity graphite multi-immersed product, which can completely soak a roasted carbon product. The roasted carbon product is put into a shot blasting machine to remove a surface shell; then the processed carbon product is preheated in a preheating furnace; the preheated carbon productis taken out to put into an impregnating tank and the impregnating tank is vacuumized; then, coal tar pitch is added into the impregnating tank; under the condition of certain pressure, the carbon product is kept for certain time; then, the carbon product is hoisted out and is cooled in a cooling pool at certain temperature for certain time; then the carbon product is hoisted out to remove surface pitch, and is roasted; according to the requirement, the processes of removing the shell, impregnating and roasting are carried out for 1-3 times; the carbon product can be soaked without adding anydiluent; and therefore, each performance index of the high-purity graphite product can be drastically improved.

Description

technical field [0001] The invention relates to the field of graphite material production, in particular to a high-purity graphite multi-impregnation product impregnation method capable of completely impregnating baked carbon products. Background technique [0002] In the production process of high-purity graphite, carbon products are roasted multiple times, and impregnation is an indispensable process. The purpose is to improve the mechanical strength and density of carbon products, thereby improving the performance of carbon products. , due to repeated roasting of carbon products, the surface is dense and hard shells are formed. Within the scope of normal production process requirements, pitch cannot enter (or partially enter) carbon products, resulting in impermeability. After roasting, due to inconsistent internal structures , resulting in large-scale internal or external cracking of carbon products, especially large-scale hot-pressed products and high-pressure cold-pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/205
Inventor 李跃午
Owner FIVE STAR NEW MATERIAL TECH CO LTD
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