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Molding method of fine grain graphite

A molding method and fine particle technology are applied in the field of graphite to achieve the effects of low cost, simple structure and reduced investment

Inactive Publication Date: 2011-11-23
福建兴朝阳硅材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing products are far from meeting the needs of large-scale single crystal furnaces. The ф1000mm×800mm fine-grained graphite materials required by large single crystal furnaces have not been reported so far.

Method used

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  • Molding method of fine grain graphite
  • Molding method of fine grain graphite
  • Molding method of fine grain graphite

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Experimental program
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Embodiment Construction

[0036] The present invention adopts such as figure 1 with 2 The difference between the main technical data of the graphite electrode forming machine shown and the ordinary vibration forming machine is:

[0037] Specific pressure: the ordinary vibration molding machine is 0.3-0.4MPa, while the specific pressure of the graphite electrode molding machine is 2-3MPa;

[0038] Pressurization method: Ordinary vibration forming machine is one-way pressurization, but this graphite electrode forming machine is two-way pressurization, and its pressure reaches more than 200 tons;

[0039] Vibration source application method: ordinary vibration molding machine is applied by vibration at the bottom of the mold, and this graphite electrode molding machine is applied in the middle.

[0040] The graphite electrode molding machine is equipped with an electrode trolley 8, a vacuum system 9, a hydraulic system 10, an electric control system 11 and a frame 13, and also has a rubber spring base 1...

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Abstract

The invention provides a molding method of fine grain graphite, relating to graphite. The molding method of the fine grain graphite comprises the following steps of crushing and then pulverizing raw material petroleum coke so as to obtain petroleum coke powder; adding F3O2 powder to the petroleum coke powder so as to obtain a mixture of the petroleum coke powder and the F3O2 powder; putting the mixture of the petroleum coke powder and the F3O2 powder into a mixing kneading pot to be heated; and then adding liquid asphalt; discharging a paste out of the pot after mixing kneading of the mixture; putting the obtained paste on a heated tablet rolling machine to be rolled; cooling the rolled tablet in a natural environment to normal temperature; grinding the cooled rolled tablet so as to obtain the ground powder; filling the ground powder into a mold cylinder after preheating the ground powder; sealing the mold cylinder; vacuumizing to eliminate gas in the paste; pressurizing two ends of the mold cylinder; starting a vibrating platform; and releasing the mold and cooling to obtain a fine grain graphite product, wherein the dimension of the fine grain graphite product can reach phi 1000 mm*800 mm.

Description

technical field [0001] The invention relates to graphite, in particular to a method for forming fine-grained graphite products. Background technique [0002] Isostatic pressed graphite products are mainly used in the production of polycrystalline silicon and monocrystalline silicon, and can be used as materials for insulation covers, heating elements, and high-temperature resistant components, and can also be used for molds in the precision casting industry. [0003] Isostatic pressing products are conventionally produced using isostatic pressing equipment, but the equipment is expensive, especially for products with large diameters, the equipment is larger and the manufacturing cost is higher. [0004] With the advancement of industrial technology, new carbon materials are being applied to various fields. The smelting of monocrystalline silicon and polycrystalline silicon, as well as the demand for fine-grained graphite in industries such as precision casting, is increasin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B3/00
Inventor 龚炳生
Owner 福建兴朝阳硅材料股份有限公司
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