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Production process of isostatic pressing special graphite

A technology of special graphite and production process, which is applied in the field of graphite production to achieve the effect of improving yield, physical and chemical performance indicators, and uniform distribution

Pending Publication Date: 2022-04-15
永安市鼎丰碳素科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The bulk density and strength of the isostatic graphite obtained by the isostatic graphite preparation process of the prior art still need to be improved, and the yield of the isostatic graphite in the processes of roasting, impregnation, and graphitization is also in urgent need of improvement

Method used

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  • Production process of isostatic pressing special graphite

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Experimental program
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Effect test

Embodiment 1

[0034] A production process of isostatic pressing special graphite, comprising the following steps:

[0035] (1) Crushing and primary grinding: the calcined coke, pitch coke, and modified pitch are first crushed with a crusher to a size below 10mm, and then crushed with a pulverizer to a particle size of 10-20 microns.

[0036] (2) Kneading and cooling: Add the pulverized calcined coke, pitch coke and modified pitch into the kneader at a weight ratio of 30:37:33. The kneader is heated with heat transfer oil, and the temperature of the heat transfer oil is 200°C. After 4 hours of kneading, the paste was lowered into a cooler for stirring and cooling.

[0037] (3) Secondary crushing, secondary grinding, and screening: Put the cooled paste into the crusher for coarse crushing to a particle size below 10mm, then use a mill to crush it to a particle size of 15-30 microns, and then crush the crushed The material is screened with a 60-mesh screening machine.

[0038] (4) Isostatic ...

Embodiment 2

[0044] A production process of isostatic pressing special graphite, comprising the following steps:

[0045] (1) Crushing and primary grinding: the calcined coke, pitch coke, and modified pitch are first crushed with a crusher to a size below 10mm, and then crushed with a pulverizer to a particle size of 10-20 microns.

[0046] (2) Kneading and cooling: Add the pulverized calcined coke, pitch coke and modified pitch into the kneader at a weight ratio of 30:35:35. The kneader is heated with heat transfer oil, and the temperature of the heat transfer oil is 200°C. After 5 hours of kneading, the paste was lowered into a cooler for stirring and cooling.

[0047] (3) Secondary crushing, secondary grinding, and screening: Put the cooled paste into the crusher for coarse crushing to a particle size below 10mm, then use a mill to crush it to a particle size of 15-30 microns, and then crush the crushed The material is screened with a 60-mesh screening machine.

[0048] (4) Isostatic ...

Embodiment 3

[0054] A production process of isostatic pressing special graphite, comprising the following steps:

[0055] (1) Crushing and primary grinding: the calcined coke, pitch coke, and modified pitch are first crushed with a crusher to a size below 10mm, and then crushed with a pulverizer to a particle size of 10-20 microns.

[0056] (2) Kneading and cooling: Add the pulverized calcined coke, pitch coke and modified pitch into the kneader at a weight ratio of 30:38:32, and heat the kneader with heat transfer oil at a temperature of 200°C. After 5 hours of kneading, the paste was lowered into a cooler for stirring and cooling.

[0057] (3) Secondary crushing, secondary grinding, and screening: Put the cooled paste into the crusher for coarse crushing to a particle size below 10mm, then use a mill to crush it to a particle size of 15-30 microns, and then crush the crushed The material is screened with an 80-mesh screening machine.

[0058] (4) Isostatic pressing: Put the screened ma...

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Abstract

The present invention discloses an isostatic pressing special graphite production process, which comprises crushing, grinding, mixing kneading, screening, isostatic pressing molding, roasting, dipping and graphitizing, and the used raw materials comprise calcined coke, pitch coke and modified pitch. The modified asphalt powder is adopted as a binder, the calcined coke powder, the asphalt coke powder and the modified asphalt powder are simultaneously added into a kneading machine to be stirred and kneaded in the kneading process, the asphalt is gradually melted and uniformly permeates into the calcined coke and the asphalt coke powder along with the increase of the temperature, and part of the asphalt uniformly coats the surfaces of the calcined coke and the asphalt coke powder, so that the surface of the calcined coke and the surface of the asphalt coke powder are uniformly coated with the modified asphalt powder. Therefore, not only is an independent asphalt melting step omitted, but also asphalt distribution is more uniform, so that the finished product rate and physical and chemical performance indexes of products are improved.

Description

technical field [0001] The invention relates to the technology in the field of graphite production, in particular to a production process of isostatic special graphite. Background technique [0002] Special graphite covers a wide range, and the electric carbon product industry, natural graphite product industry and metallurgical carbon product industry have different understandings and classification methods. As far as the customary classification of the metallurgical carbon product industry is concerned, special graphite mainly refers to high-strength , High-density, high-purity graphite products (referred to as three high graphite). Sangao graphite can be divided into three types of coarse particle, fine particle and ultrafine particle structure from the material structure; from the molding method, there are mainly three types of special graphite: molding, extrusion and isostatic pressing. In addition, vibration molding is also It can be used to produce special graphite. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/52C04B35/532C04B35/622
Inventor 李芳刘育民王铁军
Owner 永安市鼎丰碳素科技有限公司
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