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Method for protecting vulnerable graphite piece

A technology for graphite parts and damage, applied in the field of protection of vulnerable graphite parts, can solve the problems of reducing high temperature resistance and electrical conductivity, protection methods have not been reported, easy to damage, etc., to improve strength and increase anti-oxidation ability , the effect of reducing production costs

Active Publication Date: 2008-03-12
上海华硕精瓷陶瓷股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the soft texture, low strength and easy damage of graphite, it will oxidize with various substances decomposed in the firing product in the electric furnace at high temperature, and gradually reduce its high temperature resistance and conductivity after a long time of use, so that Therefore, preventing the oxidation of graphite electrodes is an effective way to prolong the service life of graphite electrodes, but effective protection methods for vulnerable graphite parts have not yet been reported.

Method used

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Comparison scheme
Effect test

Embodiment 1

[0012] The protection method of vulnerable graphite parts of the present invention, at first, take the polyvinyl alcohol and silicon carbide micropowder that concentration is 8-10% to be mixed into the relatively dilute B preparation according to the ratio of 1: 1 by weight; Then unused After the graphite parts are brushed, apply B preparation evenly on the surface of the graphite parts, place it in a cool place to air dry, and then apply a layer of B preparation again, and then put it into use after air drying again. Graphite parts treated by this method have the characteristics of anti-oxidation, high strength and long life.

Embodiment 2

[0014] The protection method of vulnerable graphite parts of the present invention, at first, get the polyvinyl alcohol and silicon carbide micropowder that concentration is 8-10% and be mixed with thicker A preparation according to the ratio of 3: 1 by weight; When graphite parts fracture, When it is damaged, you can apply A preparation on the fracture and re-bond the damaged parts together. After air drying, apply A preparation again on the fracture bonding place. After repeating 2-3 times, send the graphite part to a high temperature of 2000 ° C. Sinter in the furnace for 12-18 hours; after sintering, the strength of the repaired part can reach more than 90% of the original strength, and the damaged graphite parts can be used again, which increases the service life of the graphite parts.

Embodiment 3

[0016] The protection method of vulnerable graphite parts of the present invention, at first, get concentration and be 8-10% polyvinyl alcohol, silicon carbide micropowder and carbon powder are formulated into B preparation according to the ratio of 1: 1: 3 by weight, make like this The conductivity of the prepared preparation is enhanced, and after the unused graphite parts are brushed, the preparation B is evenly coated on the surface of the graphite parts, placed in a cool place to air dry, and then a layer of preparation B is applied again, and after air drying again Ready to use. Graphite parts treated by this method not only have the characteristics of anti-oxidation, high strength, and long life, but also do not affect their performance.

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Abstract

The present discloses a protection method to a vulnerable plumbago part. Firstly, 8-10 percent of polyethylene alcohol and carborundum powder are respectively made into two preparations such as A and B according to different weight ratio corresponding to 1-1.5: 1 and 1.6-3.5: 1; the plumbago part not being used is to be made with picking treatment, and then preparation B is coated on the surface of the plumbago evenly; after being arranged on the shade for air-drying, the plumbago is to be coated with a level of preparation B again; and after being air-dried again, the plumbago can be put into use. The inoxidizability and the intension for the plumbago after being treated can be increased to more than 1 time. If the plumbago is with cracked or damaged, preparation A can be coated on the cracked or damaged position and the damaged parts will be adhesive again. After being air-dried, preparation A is coated on the broken adhesive parts again; the process is repeated for 2 or 3 times, and then the plumbago is put into a stove with 2000 DEG C temperature and is to be agglomerated for 12-18 hours to make the intension in the broken part reach up to 90 percent higher than the original intension. The present invention can increase the life time for the plumbago.

Description

technical field [0001] The invention relates to a protection method for non-metallic graphite parts, in particular to a protection method for fragile graphite parts used in high-temperature vacuum resistance furnaces. Background technique [0002] Graphite is a non-metallic material with high temperature resistance and good electrical conductivity. It can be used as a heating element and electrode in a high temperature vacuum resistance furnace. At the same time, due to the soft texture, low strength and easy damage of graphite, it will oxidize with various substances decomposed in the firing product in the electric furnace at high temperature, and gradually reduce its high temperature resistance and conductivity after a long time of use, so that Therefore, preventing the oxidation of graphite electrodes is an effective way to prolong the service life of graphite electrodes, but effective protection methods for vulnerable graphite parts have not been reported yet. Contents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/45C04B37/00H05B7/085
Inventor 蔡鸣
Owner 上海华硕精瓷陶瓷股份有限公司
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