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High-strength graphite product produced by adding pitch coke, and preparation method thereof

A technology of graphite products and pitch coke, applied in the field of graphite product preparation, can solve the problems such as insufficient use of excellent characteristics, cracks in graphite products, and excessive amount of binder, and achieves dense structure, cracks and other unqualified products. , high-strength effect

Active Publication Date: 2018-05-18
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the amount of binder used is large, which makes it difficult to form in the later stage. Although some methods are used in this method to produce graphite products with high bulk density, high strength, fine particles, low ash content, and uniform and fine structure, the present invention In the actual research, people found that the situation of unqualified products such as cracks in graphite products during the preparation process is relatively serious, which seriously affects its yield
[0005] At the same time, graphite products are easily oxidized at high temperatures, which makes them poor in thermal fatigue, which limits their application range and prevents them from fully utilizing their excellent properties.

Method used

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  • High-strength graphite product produced by adding pitch coke, and preparation method thereof
  • High-strength graphite product produced by adding pitch coke, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] 1) Ingredients: Raw materials are prepared according to 0.30 tons of pitch coke with a particle size greater than 0mm and less than or equal to 0.8mm, 0.50 tons of calcined coke with a particle size greater than 0mm and less than or equal to 0.8mm, and 0.20 tons of coal tar pitch; wherein, the particle size is greater than 0mm and less than or equal to 0.8 The particle size distribution of pitch coke in mm is as follows:

[0072] 0.5mm

[0073] 0

[0074] 2) Kneading: Pour the prepared pitch coke and calcined coke into a kneading pot and stir for dry mixing. The dry mixing temperature is 130°C and the dry mixing time is 30 minutes; then put the coal tar pitch into the kneading pot and stir for wet mixing. The mixing temperature is 160°C, and the wet mixing time is 25 minutes;

[0075] 3) Drying: Cool the kneaded paste to 100°C for drying, and the drying time is 20 minutes;

[0076] 4) Vibration molding: Pour the air-dr...

Embodiment 2

[0082] 1) Ingredients: Raw materials are prepared according to 0.28 tons of pitch coke with a particle size greater than 0mm and less than or equal to 0.8mm, 0.52 tons of calcined coke with a particle size greater than 0mm and less than or equal to 0.8mm, and 0.20 tons of coal tar pitch; wherein, the particle size is greater than 0mm and less than or equal to 0.8 The particle size distribution of pitch coke in mm is as follows:

[0083] 0.5mm

[0084] 0

[0085] 2) Kneading: Pour the prepared pitch coke and calcined coke into a kneading pot and stir for dry mixing. The dry mixing temperature is 120°C and the dry mixing time is 30 minutes; then put the coal tar pitch into the kneading pot and stir for wet mixing. The mixing temperature is 130°C, and the wet mixing time is 25 minutes;

[0086] 3) Drying: Cool the kneaded paste to 120°C for drying, and the drying time is 20 minutes;

[0087] 4) Vibration molding: Pour the air-dr...

Embodiment 3

[0093] 1) Ingredients: Raw materials are prepared according to 0.32 tons of pitch coke with a particle size greater than 0 mm and less than or equal to 0.8 mm, 0.48 tons of calcined coke with a particle size greater than 0 mm and less than or equal to 0.8 mm, and 0.20 tons of coal tar pitch; wherein, the particle size is greater than 0 mm and less than or equal to 0.8 The particle size distribution of pitch coke in mm is as follows:

[0094] 0.5mm

[0095] 0

[0096] 2) Kneading: Pour the prepared pitch coke and calcined coke into a kneading pot and stir for dry mixing. The dry mixing temperature is 140°C and the dry mixing time is 30 minutes; then put the coal tar pitch into the kneading pot and stir for wet mixing. The mixing temperature is 160°C, and the wet mixing time is 25 minutes;

[0097] 3) Drying: Cool the kneaded paste to 100°C for drying, and the drying time is 30 minutes;

[0098] 4) Vibration molding: Pour the a...

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Abstract

The invention belongs to the technical field of preparation of graphite products, and particularly relates to a high-strength graphite product produced by adding pitch coke, and a preparation method thereof, wherein the high-strength graphite product comprises an aggregate and a binder, the aggregate is pitch coke and calcined coke, the binder is coal tar pitch, and a mass ratio of the pitch coketo the calcined coke to the binder is 28-32%:48-52%:18-22%. According to the present invention, the strength of the graphite product is increased by adding pitch coke, wherein the pitch coke has highstrength, the crushed pitch coke and the calcined coke are used as the dry material so as to substantially improve the strength of the graphite product; and the raw materials of the graphite product contain the pitch, and the pitch can be carbonized and coked after roasting, such that only the strength of the graphite product added with the pitch coke can be increased while the change of other indexes cannot be affected, the occurrence of cracks and other unqualified products is low, and the high-temperature oxidation resistance is strong.

Description

technical field [0001] The invention belongs to the technical field of preparation of graphite products, and in particular relates to a high-strength graphite product produced by adding pitch coke and a method thereof. Background technique [0002] Graphite products are a kind of high-temperature and anti-oxidation products that use calcined coke as raw materials, coal tar pitch, etc. conductive material. Widely used in different fields such as metallurgy, chemical industry, aerospace, electronics, machinery, building materials, nuclear energy, etc., such as bearings and sealing rings for wear resistance; electrodes for EDM, electrodes for electrolytic machining; crystallizers for continuous casting; semiconductor production Heaters, crucibles, furnace linings; sintering molds and aerospace vehicle gas rudders and engine protection sleeves, etc. [0003] At present, ordinary graphite produced in China is made of calcined coke and pitch, and its strength is low and cannot m...

Claims

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Application Information

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IPC IPC(8): C04B35/532C04B35/52C04B35/622
CPCC04B35/522C04B35/532C04B35/622C04B2235/5427C04B2235/5436C04B2235/602C04B2235/616C04B2235/656C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607
Inventor 刘伟凯张培模张培林戴雪飞张二丽赤义军
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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