High-temperature gas-cooled reactor internal components with large-scale nuclear graphite material and preparation method

A high-temperature gas-cooled reactor, large-scale technology, applied in the field of nuclear graphite production, can solve the problems of complex procedures and low efficiency

Active Publication Date: 2020-12-04
SINOSTEEL NEW MATERIAL ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] CN201410638623.1 (publication number is CN104401982A) discloses a preparation method of nuclear graphite material, which adopts kneading, pulverization, isostatic pressing, roasting, impregnation, re-calcination and graphitization treatment. The purification and graphitization of the obtained nuclear graphite block are carried out separately, and the process is complicated and inefficient due to multiple purifications; in addition, the patent purifies by introducing a halogen or halogenated hydrocarbon atmosphere in a roasting process, because the The primary calcination temperature is 800-1100°C, which is much lower than the boiling point of the high melting point compound formed by carbon in the nuclear graphite material, and some high boiling point halides cannot be removed by this method

Method used

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  • High-temperature gas-cooled reactor internal components with large-scale nuclear graphite material and preparation method
  • High-temperature gas-cooled reactor internal components with large-scale nuclear graphite material and preparation method
  • High-temperature gas-cooled reactor internal components with large-scale nuclear graphite material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0127] 1. Raw materials: asphalt coke 80 parts by weight and 20 parts by mass;

[0128] 2, preparation method:

[0129] 1) Raw material selection: Select asphalt coke and asphalt.

[0130] Asphalt coke: The fixed carbon content is ≥98.5%, ash ≤ 0.5%, boron (B), ruthenium (GD) is less than 0.1 ppm, 钐 (SM), ruthenium (EU), cadmium (CD) and lithium (Li) all Less than 0.5 ppm, water ≤ 0.5%, sulfur ≤ 0.5%;

[0131] Asphalt: ash is ≤0.5%, volatilization is 35-60%, the cocked value is 40-70%, the softening point is 80-200 ° C, the quinoline insoluble is 8-25%, the toluene insoluble material is 25-55% ;

[0132] 2) Raw material grinding

[0133] Step 1) Asphalt coke abrasion to the average particle size of no more than 50 μm.

[0134] 3) ingredients, mixed

[0135] Set high-precision automatic metering system parameters, which weigh asphalt coke and bitumens in accordance with the ratio, and the temperature is 150 ° C, the mixture is 80 min.

[0136] 4) Waiting for static pressing

[0137...

Embodiment 2

[0146] 1. Raw materials: petroleum coke 70 parts by weight and 30 parts by mass.

[0147] 2, preparation method:

[0148] 1) Raw material selection

[0149] Choose petroleum coke and asphalt.

[0150] Mainly followed by the following raw materials and performance indicators:

[0151] Petroleum coke: The fixed carbon content is ≥98.5%, ash ≤ 0.5%, boron (B), ruthenium (GD) is less than 0.1 ppm, 钐 (SM), ruthenium (EU), cadmium (CD) and lithium (Li) all Less than 0.5 ppm, water ≤ 0.5%, sulfur ≤ 0.5%;

[0152] Asphalt: ash is ≤0.5%, volatilization is 35-60%, the cocked value is 40-70%, the softening point is 80-200 ° C, the quinoline insoluble is 8-25%, the toluene insoluble material is 25-55% ;

[0153] 2) Raw material grinding

[0154] Step 1) Petroleum coke abrasion powder does not exceed 50 μm.

[0155] 3) ingredients, mixed

[0156] The petroleum coke and asphalt were placed in a kneading machine, the temperature was 200 ° C, the mixture time was 100 min.

[0157] 4) Waiting for ...

Embodiment 3

[0166] 1. Raw materials: asphalt coke 65 parts by weight and 35 parts by asphalt.

[0167] 2, preparation method:

[0168] 1) Raw material selection

[0169] Choose asphalt coke and asphalt.

[0170] Mainly followed by the following raw materials and performance indicators:

[0171] Asphalt coke: The fixed carbon content is ≥98.5%, ash ≤ 0.5%, boron (B), ruthenium (GD) is less than 0.1 ppm, 钐 (SM), ruthenium (EU), cadmium (CD) and lithium (Li) all Less than 0.5 ppm, water ≤ 0.5%, sulfur ≤ 0.5%;

[0172] Asphalt: ash is ≤0.5%, volatilization is 35-60%, the cocked value is 40-70%, the softening point is 80-200 ° C, the quinoline insoluble is 8-25%, the toluene insoluble material is 25-55% ;

[0173] 2) Raw material grinding

[0174] Step 1) Petroleum coke abrasion powder does not exceed 40 μm.

[0175] 3) ingredients, mixed

[0176] According to the ratio, petroleum coke and asphalt were referred to, inserted into the kneading machine, the temperature was 250 ° C, the mixture was 12...

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Abstract

The invention relates to a large-dimension nuclear graphite material for a reactor internal of a high-temperature gas cooled reactor and a preparation method. The method comprises the following stepsof: raw material selection, grinding, mixing-kneading, forming, roasting, 0 to 1 time of impregnation, and graphitization / nuclear-pure processing. The large-dimension nuclear graphite material is simple in process and convenient to operate and adopts little production equipment, so that cost is further reduced; the large-dimension nuclear graphite material is convenient to popularize and apply andis applicable to large-scale production; compared with the prior art, the provided product has a large scale and has neutron irradiation performance data.

Description

Technical field [0001] The present invention relates to a nuclear graphite production area, in particular, refers to a large-specific size nuclear graphite material for high temperature gas-cooling stacks and a preparation method thereof. Background technique [0002] Graphite is used in the heat neutron reactor, and it is also desirable for the polymented heap, which can be used as a neutron choosager in the fuel zone, a reflective layer material around the fuel zone, and a structural material inside the core. [0003] Nuclear graphite is a graphite material for nuclear industries. [0004] Nuclear graphite is used in the most core components in high temperature gas cold stacks. Direct contact with nuclear fission all products, therefore, the material itself is advanced, performance, performance, and large-scale large-scale size graphite materials The stability of the aspect will directly define the normal service life of the nuclear reactor, the operation of the nuclear power p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/532
CPCC04B35/522C04B35/532C04B2235/77C04B2235/95C04B2235/96C04B2235/9607
Inventor 黄岱杨辉李贺曹曙林
Owner SINOSTEEL NEW MATERIAL ZHEJIANG
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