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Artificial graphite product taking emulsified asphalt as binder and preparation method thereof

A technology of emulsified asphalt and artificial graphite, which is applied in the direction of chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of large surface area of ​​fine-grained aggregates, increased use of asphalt, and increased number of impregnations, etc., to achieve environmental protection and simplicity in the operation process , low cost, good storage stability

Active Publication Date: 2014-06-11
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, when preparing fine-structure graphite, ultra-fine-structure graphite and isotropic graphite, the aggregate particle size is small, and the traditional kneading method will cause problems
The surface area of ​​fine-grained aggregates is large, and the amount of asphalt used increases, which causes certain difficulties in roasting
Moreover, the density of the product becomes lower after firing, which may increase the number of impregnations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this embodiment, a kind of artificial graphite product using emulsified asphalt as binder, its raw material comprises emulsified asphalt binder and aggregate, the mass ratio of actual binder and aggregate is 0.3: 1, and the mass ratio of described aggregate The component is natural microcrystalline graphite, the natural microcrystalline graphite is purified natural microcrystalline graphite, the fixed carbon content is 99.9%, and the particle size is ≤40 μm. The binder is emulsified asphalt, and the softening point of the asphalt is 60°C. The actual binder mass is the bituminous phase mass actually contained in the emulsified asphalt.

[0030] A kind of preparation method of the artificial graphite product that present embodiment uses emulsified pitch as binding agent, comprises the following steps:

[0031] In the first step, the binder and the aggregate with an actual mass ratio of 0.3:1 are directly mixed in a mixer at room temperature, and the components of the ...

Embodiment 2

[0038] In this embodiment, a kind of artificial graphite product using emulsified pitch as binder, its raw material comprises binder and aggregate, the mass ratio of actual binder and aggregate is 0.3: 1, and the component of described aggregate is : Natural microcrystalline graphite accounts for 90% of the aggregate mass, and mesophase carbon microspheres account for 10%; the microcrystalline graphite is purified natural microcrystalline graphite, with a fixed carbon content of 99.9% and a particle size of ≤40 μm. The mesophase carbon microspheres are lightly pre-oxidized, and the particle size is ≤20 μm. The binder is emulsified asphalt, the asphalt softening point is 60°C, and the actual binder mass is the bitumen phase mass actually contained in the emulsified asphalt.

[0039] A kind of preparation method of the artificial graphite product that present embodiment uses emulsified pitch as binding agent, comprises the following steps:

[0040] In the first step, the binder...

Embodiment 3

[0047] In this embodiment, a kind of artificial graphite product using emulsified pitch as binder, its raw material comprises binder and aggregate, the mass ratio of actual binder and aggregate is 0.7:1, and the component of described aggregate It is: natural microcrystalline graphite accounts for 50% of aggregate mass, and mesophase carbon microspheres account for 50%; said microcrystalline graphite is purified natural microcrystalline graphite with a fixed carbon content of 99.9% and a particle size of ≤40 μm. The mesophase carbon microspheres are slightly pre-oxidized, and the particle size is ≤20 μm. The binder is emulsified asphalt, and the softening point of the asphalt is 70° C., and the actual binder mass is the actual bitumen phase mass contained in the emulsified asphalt.

[0048] A kind of preparation method of the artificial graphite product that present embodiment uses emulsified pitch as binding agent, comprises the following steps:

[0049] In the first step, t...

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PUM

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Abstract

The invention discloses an artificial graphite product taking emulsified asphalt as a binder and a preparation method thereof. The practical mass ratio of the binder and aggregate in the artificial graphite product is (0.05-0.70):1; the aggregate is one or more of petroleum coke, pitch coke, secondary coke, natural amorphous graphite, intermediate-phase carbon microbead or graphite return scrap; different aggregates do not have a limited proportion; when the main body of the aggregate is the natural amorphous graphite, the natural amorphous graphite accounts for 50-100wt% of the aggregate, the residual material is one or more of petroleum coke, pitch coke, secondary coke, intermediate-phase carbon microbead or graphite return scrap, and all materials do not have the limited proportion; and the binder is the emulsified asphalt. The preparation method comprises the following steps: firstly, evenly mixing the emulsified asphalt with the aggregate to obtain powder; forming, roasting, dipping and secondarily roasting the powder; and finally, carrying out graphitization processing. After meeting each other, the emulsified asphalt and the aggregate are randomly cracked to guarantee the coating evenness of the aggregate by the asphalt. The emulsified asphalt is completely in a water system, the organic solvent does not need to be used, and the operation process is environmentally-friendly, simple and convenient.

Description

technical field [0001] The invention belongs to the technical field of graphite products, and in particular relates to an artificial graphite product using emulsified pitch as a binder and a preparation method thereof. Background technique [0002] Isotropic graphite is a kind of high-grade artificial graphite material, which is widely used in many high-tech fields. In general, the isotropic properties of graphite are described by the ratio of the linear thermal expansion coefficients along two mutually perpendicular directions, which is called the degree of isotropy. According to the provisions of ASTM standard C 709-06 on nuclear graphite, those with isotropy between 1.00-1.10 belong to isotropic graphite; those between 1.10-1.15 are called nearly isotropic graphite; those with a degree of isotropy greater than 1.15 are called anisotropic graphite. [0003] The production process of isotropic graphite is basically the same as that of ordinary graphite products. In the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C01B32/205
Inventor 康飞宇申克黄正宏沈万慈
Owner TSINGHUA UNIV