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Nuclear graphite material composition and preprocessing method

A technology of pretreatment and nuclear graphite, which is applied in the combination of nuclear graphite materials and its processing, and in the field of graphite production, which can solve the problems of increasing the difficulty of nuclear graphite purification, reducing the oxidation resistance of materials, and increasing the manufacturing process, so as to achieve stable and guaranteed supply sources , easy to purify, and reduce the effect of the manufacturing process

Active Publication Date: 2012-07-25
CHENGDU CARBON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The manufacturing process of the above-mentioned patents is complicated. Zhao 58-23324 reduces the oxidation resistance of the material due to the presence of alkali metals, and also increases the difficulty of purification of nuclear graphite; The particle composition is very coarse, it is difficult to effectively reduce the "aspect ratio" of coke particles, which is not conducive to the formation of isotropic coke, and the impregnation in molten metal increases the manufacturing process and increases the manufacturing cost

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  • Nuclear graphite material composition and preprocessing method

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Effect test

Embodiment 1

[0041] The nuclear graphite material manufacturing raw material of the present embodiment contains the following components by weight:

[0042] 20 parts of petroleum coke powder, 70 parts of pitch coke powder, 10 parts of graphite powder, 1-3 parts of surfactant, 40-45 parts of coal tar pitch. During preparation, the above-mentioned powder is ground to 15-22 μm, kneaded, secondary pulverized, molded preformed, isostatically pressed, roasted, and crushed to become the raw material for nucleated graphite production. The raw material parameters are shown in the table below.

Embodiment 2

[0044] The nuclear graphite material manufacturing raw material of the present embodiment contains the following components by weight:

[0045] 10 parts of petroleum coke powder, 80 parts of pitch coke powder, 15 parts of graphite powder, 1-3 parts of surfactant, 40-45 parts of coal tar pitch. During preparation, the above-mentioned powder is ground to 15-22 μm, kneaded, secondary pulverized, molded preformed, isostatically pressed, roasted, and crushed to become the raw material for nucleated graphite production. The raw material parameters are shown in the table below.

[0046] Other process conditions remain unchanged during the implementation of the above scheme.

[0047] The physicochemical index of nuclear graphite material made with the pretreatment raw material of the present invention

[0048]

[0049] The present invention pretreats the domestic common raw materials by adopting the granular composition formula and the isostatic pressing method to prepare the raw...

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Abstract

The invention discloses a nuclear graphite material composition and a preprocessing method. The nuclear graphite material composition comprises 10 to 20 parts of petroleum coke powder, 70 to 80 parts of tar coke powder, 10 to 15 parts of graphite powder, 40 to 45 parts of coal tar and 1 to 3 parts of surfactant. The nuclear graphite material is prepared by the steps of kneading the raw materials,secondarily crushing the raw materials, isostatically pressing the raw materials, roasting the raw materials and the like. In the invention, the raw materials are made in China, an alkali metal catalyst is not used, isostatic technology is adopted, the prepared nuclear graphite material is low in cost, the uniformity of isotropy is high; and the antioxidant performance is high.

Description

technical field [0001] The invention belongs to the field of graphite production, and in particular relates to a combination of nuclear graphite materials and the technical field of processing thereof. Background technique [0002] Nuclear graphite is a branch of graphite materials researched and developed in response to the needs of building nuclear fission reactors. It is used as moderator, reflection and core structure materials in production reactors, gas-cooled reactors and high-temperature gas-cooled reactors. It is also a nuclear fusion reactor A promising candidate for plasmonic materials. [0003] Graphite material is mainly composed of polycrystalline graphite, which is an inorganic non-metallic material, but it has good thermal and electrical conductivity and is called a semi-metal. It has a higher melting point and chemical stability than metals. It can sublimate at 3600 °C under normal pressure. becomes a gas. Nuclear graphite is a branch of graphite materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04
Inventor 苏启晖
Owner CHENGDU CARBON