Artificial graphite crucible and preparation method thereof

A technology of artificial graphite and graphite crucible, applied in the field of graphite crucible and its preparation, can solve the problems of poor resistance to rapid cooling and rapid heating, poor service performance, crucible rupture, etc., and achieve the effects of good resistance to strong acid, energy saving, and good corrosion resistance.

Inactive Publication Date: 2018-05-18
中国平煤神马控股集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) Poor use performance: During use, due to poor corrosion resistance, poor oxidation resistance, and rapid cooling and rapid heat resistance, crucible rupture, oxidation, and hole penetration often occur, causing unnecessary losses to production;
[0005] 2) High ash content: the ash content of the crucible is high, which is easy to cause pollution to the product;

Method used

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  • Artificial graphite crucible and preparation method thereof
  • Artificial graphite crucible and preparation method thereof
  • Artificial graphite crucible and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The artificial graphite crucible of the present invention is represented by weight percentage, and the artificial graphite crucible is made of 45% of raw coke, 25% of artificial graphite powder and 30% of high-temperature modified pitch.

Embodiment 2

[0042] The preparation method of the artificial graphite crucible of embodiment 1 of the present invention, the detailed steps of this preparation method are as follows:

[0043]1) Grinding raw coke to 0-6mm, artificial graphite powder to ≤200μm; melting high-temperature modified pitch into liquid;

[0044] 2) The three raw materials processed in step 1) are batched according to the batching ratio of the artificial graphite crucible described in Example 1;

[0045] 3) Send the raw materials prepared in step 2) into a vertical high-speed kneader, and knead evenly at 180-200° C. for 20 minutes to obtain a paste;

[0046] 4) Cool the paste obtained in step 3) to 130-140°C;

[0047] 5) Send the paste obtained after step 4) cooling material into a molding machine, and form it under a pressure of 1200 tons to obtain a graphite crucible raw product. The bulk density of the graphite crucible raw product is 1.78g / cm 3 ;

[0048] 6) Send the graphite crucible raw product obtained in ...

Embodiment 3

[0058] The artificial graphite crucible of the present invention is represented by weight percentage, and the artificial graphite crucible is made of 50% of raw coke, 22% of artificial graphite powder and 28% of refined pitch.

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Abstract

The invention discloses an artificial graphite crucible and a preparation method thereof. The artificial graphite crucible is prepared from main raw materials in percentage by weight as follows: 45%-65% of coke, 15%-25% of artificial graphite powder and 20%-30% of high-temperature modified pitch. Firstly, the prepared coke and artificial graphite powder are crushed, and the high-temperature modified pitch is molten into a liquid; the treated raw materials are uniformly mixed and kneaded, and paste is obtained; the paste is cooled and formed, and a raw graphite crucible product is obtained; theraw graphite crucible product is sent to an annular roaster with a cover to be roasted, and a primary roasted product is obtained; the primary roasted product is sent to a high-pressure impregnationtank for pressurized impregnation, and a graphite crucible impregnated product is obtained; the impregnated product is sent to an underbody roaster to be roasted, and a secondary roasted product is obtained; the secondary roasted product is sent to a graphitization furnace for graphitization, and a graphite crucible graphitized product is obtained; finally, conventional machining is performed andthe artificial graphite crucible product is obtained. The prepared artificial graphite crucible has high capacity and good use performance.

Description

1. Technical field: [0001] The invention relates to a graphite crucible and a preparation method thereof, in particular to an artificial graphite crucible with large capacity and good performance and a preparation method thereof. 2. Background technology: [0002] Graphite is a crystal of carbon, a non-metallic material with silver-gray color, soft texture and metallic luster. The melting point of graphite is extremely high, and it begins to soften and tends to melt when it reaches 3000°C under vacuum, and graphite begins to evaporate and sublime when it reaches 3500°C. The strength of general materials gradually decreases at high temperatures, but when graphite is heated to 2000 ° C, its strength is about double that of normal temperature. The thermal conductivity and electrical conductivity of graphite are quite high, and its conductivity is about 4 times higher than that of stainless steel, about 2 times higher than that of carbon steel, and about 100 times higher than t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/632C04B35/622
CPCC04B35/522C04B35/622C04B35/632C04B35/66C04B2235/608C04B2235/6562C04B2235/72C04B2235/727C04B2235/77C04B2235/96
Inventor 李毛吕有厂海国栋杨旭陈茜茹靳鹏王旭峰张静谷小虎王育红万建民刘运平袁强冯俊杰郑建华路培中张胜恩周浩张谦杜爱芳
Owner 中国平煤神马控股集团有限公司
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