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Isostatic graphite preparation method and preparation device

A preparation device and isostatic pressing technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as low mechanical strength, easy decomposition and volatilization, and difference in volume shrinkage between fillers and binders

Inactive Publication Date: 2018-11-23
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the above process, the binder is easy to decompose and volatilize during the roasting process, resulting in the difference in volume shrinkage between the filler and the binder, and finally the graphite material has disadvantages such as high porosity, poor structure uniformity, and obvious interface. , resulting in lower mechanical strength of the final isostatic graphite product

Method used

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  • Isostatic graphite preparation method and preparation device
  • Isostatic graphite preparation method and preparation device
  • Isostatic graphite preparation method and preparation device

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Effect test

Embodiment 1

[0033] see figure 1 , a method for preparing isostatic graphite provided in the embodiment of the present invention, characterized in that, the method for preparing isostatic graphite comprises the following steps:

[0034] Using a jet mill to pulverize the needle-shaped petroleum coke to obtain small-sized needle-shaped petroleum coke powder;

[0035] Calcining the small-sized needle-shaped petroleum coke powder at a temperature of 900°C-1100°C, and acid leaching the needle-shaped petroleum coke powder at the calcined end to obtain purified needle-shaped petroleum coke powder;

[0036] Kneading 65-70 parts of the purified needle-shaped petroleum coke powder and 45-25 parts of modified pitch at a temperature of 150°C-170°C to obtain needle-shaped petroleum coke powder paste;

[0037]The needle-shaped petroleum coke powder paste is rolled into flakes, and the flakes are carried out 2-3 times to obtain needle-shaped petroleum coke flakes of 2-3mm;

[0038] The needle-shaped pe...

Embodiment 2

[0046] A method for preparing isostatic graphite provided in an embodiment of the present invention is characterized in that the method for preparing isostatic graphite comprises the following steps:

[0047] Using a jet mill to pulverize the needle-shaped petroleum coke to obtain small-sized needle-shaped petroleum coke powder;

[0048] Calcining the small-sized needle-shaped petroleum coke powder at a temperature of 900°C-1100°C, and acid leaching the needle-shaped petroleum coke powder at the calcined end to obtain purified needle-shaped petroleum coke powder;

[0049] Kneading 65-70 parts of the purified needle-shaped petroleum coke powder and 45-25 parts of modified pitch at a temperature of 150°C-170°C to obtain needle-shaped petroleum coke powder paste;

[0050] The needle-shaped petroleum coke powder paste is rolled into flakes, and the flakes are carried out 2-3 times to obtain needle-shaped petroleum coke flakes of 2-3mm;

[0051] The needle-shaped petroleum coke fl...

Embodiment 3

[0059] A method for preparing isostatic graphite provided in an embodiment of the present invention is characterized in that the method for preparing isostatic graphite comprises the following steps:

[0060] Using a jet mill to pulverize the needle-shaped petroleum coke to obtain small-sized needle-shaped petroleum coke powder;

[0061] Calcining the small-sized needle-shaped petroleum coke powder at a temperature of 900°C-1100°C, and acid leaching the needle-shaped petroleum coke powder at the calcined end to obtain purified needle-shaped petroleum coke powder;

[0062] Kneading 65-70 parts of the purified needle-shaped petroleum coke powder and 45-25 parts of modified pitch at a temperature of 150°C-170°C to obtain needle-shaped petroleum coke powder paste;

[0063] The needle-shaped petroleum coke powder paste is rolled into flakes, and the flakes are carried out 2-3 times to obtain needle-shaped petroleum coke flakes of 2-3mm;

[0064] The needle-shaped petroleum coke fl...

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Abstract

The invention relates to an isostatic graphite preparation method and preparation device. The method comprises the following steps: pulverizing needlelike petroleum coke, calcining the needlelike petroleum coke powder, performing the acid leaching on the calcined needlelike petroleum coke powder, kneading the purified needlelike petroleum coke powder with modified asphalt, flaking a needlelike petroleum coke powder paste material, cooling and crushing needlelike petroleum coke flakes, extruding the crushed needlelike petroleum coke into a cylindrical rod, pulverizing and sieving the petroleumcoke cylindrical rod, kneading the secondary petroleum coke powder with the modified asphalt, putting a raw material mixture into a rubber mold, putting an isostatically pressed embryo body into a jacket, calcining to obtain a calcined product, and placing the calcined product in an impregnation tank to be sealed and immersed to obtain the isostatic graphite. The isostatic graphite preparation method provided by the invention has the advantages of obviously reducing the porosity of the finished isostatic graphite product so that the finished isostatic graphite product has a uniform structure,and remarkably improving the mechanical strength of the isostatic graphite product.

Description

technical field [0001] The invention relates to the technical field of graphite materials, in particular to an isostatic graphite preparation method and a preparation device. Background technique [0002] Isostatic graphite refers to high-strength, high-density, high-purity graphite products, also known as three-high graphite and special graphite, which are widely used in metallurgy, chemical industry, aerospace, electronics, machinery, nuclear energy and other industrial fields. In particular, large-scale and high-quality isostatic graphite, as an alternative material, has a very broad application space in high-tech and new technology fields, and has broad application prospects. It is known as the most promising material in the century. Due to the characteristics of high strength, high density, high purity and isotropy of isostatic graphite materials, graphite parts made of it are heated and heated more uniformly during use, and at the same time, due to the uniform density ...

Claims

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Application Information

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IPC IPC(8): C04B35/52C04B35/532C04B35/622C01B32/205
CPCC04B35/522C04B35/532C04B35/622C01B32/205
Inventor 武晨洁
Owner DATONG XINCHENG NEW MATERIAL CO LTD