Multi-block material bonding method of large graphite heating body for producing vacuum induction furnace

Abstract

The invention discloses a multi-block material bonding method of a large graphite heating body for producing a vacuum induction furnace. Graphite blocks are spliced into a large graphite heating body,the graphite blocks are provided with T-shaped bosses and T-shaped necks respectively, the T-shaped bosses and the T-shaped necks are matched with each other, every two adjacent graphite blocks are connected in a clamped mode through the corresponding bosses and the corresponding necks, a glue filling gap is reserved between the every two adjacent graphite blocks, and threaded holes are formed inthe upper end faces of the bosses and the necks which are connected in a clamped mode. The spliced graphite heating body is placed in a drying furnace; a glue injection valve of a high-pressure gluegun is connected with the threaded hole of the graphite heating body, the glue filling gap of the spliced graphite heating body is fully filled with high-temperature graphite glue, the high-temperature graphite glue is composed of furfuryl alcohol, tall acid TEA salt, superconducting carbon black and artificial graphite powder, drying is conducted, and the large graphite heating body is obtained.The method has the advantages that the graphite heating body with the diameter of more than 2000mm can be produced, the yield is high, and the method is widely applied to the fields of domestic carbon-carbon compounding, war industry and vacuum sintering.

Description

technical field [0001] The invention relates to a method for bonding multiple pieces of large-scale graphite heating elements used in the production of vacuum induction furnaces. This technology is widely used in the fields of military industry, photovoltaics, carbon-carbon composites and vacuum equipment. Background technique [0002] Graphite induction heating means that a large current flows to a heating coil that is wound into a ring or other shape. The heating coil is usually made of copper tube. As a result, a strong magnetic flux with instantaneous polarity changes is generated in the heating coil. When the graphite heating element is placed in the coil, the magnetic flux will penetrate the surface of the graphite heating element for about 20mm, and resistance will be generated inside the graphite heating element in the direction opposite to the heating current. Correspondingly large eddy currents will be generated. Due to the existence of resistance in the graphite ...

AI Technical Summary

Problems solved by technology

However, there are only two carbon companies located in Zibo City, Shandong Province that can produce graphite blanks with a diameter of 2000mm in China, and the yield is extremely low and the sales price is extremely high.

However, graphite blanks with a diameter of more than 2000mm have not been produced and processed by any enterprise so far, which seriously curbs the production and development of large-scale products in the domestic carbon-carbon composite, military industry, photovoltaic and vacuum sintering fields.

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