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Preparation method of high-strength isostatic pressing graphite

An isostatic pressing and high-strength technology, which is applied in the field of static pressure graphite preparation, can solve the problem of inability to ensure the mixing of pitch mesocarbon microspheres and paste powder in a fixed ratio, and achieve the effect of prolonging the laying time

Active Publication Date: 2021-02-12
SINOSTEEL NEW MATERIAL ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For above problem, the present invention provides a kind of preparation method of high-strength isostatic graphite, by in carbon microsphere mixing step, utilize the production raw material mixing equipment of high-strength isostatic graphite, paste powder and asphalt intermediate Phase carbon microspheres are uniformly mixed according to the ratio. During the mixing process, the pitch mesocarbon microspheres are preheated, so that the heated pitch mesocarbon microspheres are injected into the flat paste powder layer, and the asphalt mesocarbon microspheres are used. The heat carried by the mesocarbon microspheres is bonded to the asphalt in the paste powder layer to realize the mixing and bonding of the asphalt mesocarbon microspheres and the paste powder, which solves the problem that the traditional mixing equipment cannot guarantee the Technical Problems of Partial Mixing of Pitch Mesophase Carbon Microspheres and Paste Powder

Method used

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  • Preparation method of high-strength isostatic pressing graphite
  • Preparation method of high-strength isostatic pressing graphite
  • Preparation method of high-strength isostatic pressing graphite

Examples

Experimental program
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Effect test

Embodiment 1

[0077] like figure 1 Shown, a kind of preparation method of high strength isostatic graphite, comprises the following steps:

[0078] Step 1, raw material selection, crushing the calcined petroleum coke or pitch coke raw material and then pulverizing to obtain raw material powder with a median particle size D50 in the range of 8-15um;

[0079] Step 2, kneading process, mix the raw material powder prepared in step 1 evenly in the kneading pot and preheat to 150°C, add high-temperature coal tar pitch with a softening point of 110-120°C as a binder for kneading, and knead at 190-200°C After kneading at ℃ for 60 minutes, take it out of the pot, and after the paste is cooled, carry out secondary grinding to obtain paste powder with a median particle size D50 range of 25-50um;

[0080] Step 3, carbon microspheres are mixed, and the paste powder prepared in step 2 is mixed with pitch mesophase carbon microspheres with a median particle size D50 range of 2-5um and a volatile content ...

Embodiment 2

[0127] like Figure 2 to Figure 5 Shown, a kind of raw material mixing equipment for the production of high-strength isostatic graphite, comprising:

[0128] A mounting frame 1, the mounting frame 1 is arranged in a frame;

[0129] Reaction tank 2, the reaction tank 2 is arranged in an hourglass shape, and it includes two funnel-shaped and facing tank bodies 21, and a storage chamber 211 is arranged in the tank body 21 above, and the storage chamber Raw material powder is stored in 211, and a material receiving cavity 212 is arranged in the tank body 21 located below, and the tank body 21 is rotatably installed on the installation frame 1 through the connecting shell 23, and the tank body 21 A material tube 213 is arranged on the flat side wall;

[0130] Feed head 3, described feed head 3 is arranged between described tank body 21, and it comprises the inner tube 31 that communicates with described tank body 21 and the feeder 32 that is arranged around this inner tube 31, an...

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Abstract

The invention relates to the technical field of preparation of high-strength isostatic pressing graphite, in particular to a preparation method of high-strength isostatic pressing graphite, which comprises the following steps: selecting raw materials, kneading, mixing carbon microspheres, preparing a green body, roasting and graphitizing, wherein the carbon microsphere mixing comprises the steps of feeding, preheating, raw material paving, airflow flowing, rotary switching and outputting, in the carbon microsphere mixing step, paste powder and asphalt mesophase carbon microspheres are uniformly mixed according to a certain proportion, and in the mixing process, the asphalt mesophase carbon microspheres are preheated, so that the asphalt mesophase carbon microspheres are uniformly mixed according to a certain proportion. The heated asphalt mesocarbon microbeads are injected into the tiled paste powder layer, and heat carried by the asphalt mesocarbon microbeads is used for bonding withasphalt in the paste powder layer, so that mixed bonding of the asphalt mesocarbon microbeads and the paste powder is realized, and the problem that the asphalt mesocarbon microbeads and the paste powder cannot be uniformly mixed even if the asphalt mesocarbon microbeads and the paste powder are mixed by traditional mixing equipment is solved. The fixed-ratio mixing of the asphalt mesocarbon microbeads and the paste powder of each part cannot be ensured.

Description

technical field [0001] The invention relates to the technical field of preparation of high-strength isostatic graphite, in particular to a preparation method of high-strength isostatic graphite. Background technique [0002] Isostatic graphite, a new type of carbon / graphite material, has a series of excellent properties, such as high temperature resistance, corrosion resistance, high strength, good electrical conductivity, low thermal expansion coefficient, good thermal shock resistance, etc., and is isotropic It is widely used in the production of Czochralski single crystal furnace thermal field graphite components, polysilicon melting furnace graphite thermal field components, compound semiconductor manufacturing heaters, crucibles and other components, nuclear reactor core structure, EDM electrodes, metal Graphite crystallizers for continuous casting, etc., have extremely high industrial application value. [0003] Existing isostatic graphite production usually uses calc...

Claims

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Application Information

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IPC IPC(8): C04B35/52C04B35/622
CPCC04B35/522C04B35/622C04B2235/602C04B2235/6562C04B2235/6565C04B2235/6567
Inventor 黄岱李贺刘百明刘涛
Owner SINOSTEEL NEW MATERIAL ZHEJIANG
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