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Isostatic graphite preparation process for craft product processing

A technology of isostatic pressing and products, applied in the field of static pressing graphite preparation technology, can solve the problems of handicraft processing and unapplied graphite products.

Active Publication Date: 2021-01-08
SINOSTEEL NEW MATERIAL ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, the present invention provides a preparation process for isostatic graphite used in the processing of craft products, by utilizing vibration and vacuum treatment of the kneaded and ground mixture before isostatic pressing to remove the powder of the mixture. The air between the bodies avoids the impact on the density of the formed graphite products during the isostatic pressing process, increases the density of the formed graphite products, and solves the technical problem that graphite products cannot be applied to handicraft processing due to density factors

Method used

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  • Isostatic graphite preparation process for craft product processing
  • Isostatic graphite preparation process for craft product processing
  • Isostatic graphite preparation process for craft product processing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] like figure 1 shown

[0102] 1. Raw materials: 65 parts by weight of petroleum coke with an average diameter of 10 μm and 35 parts by weight of pitch.

[0103] 2. Preparation method:

[0104] Step 1. Raw material selection

[0105] Choose from petroleum coke and pitch.

[0106] It mainly consists of the following raw materials and performance indicators:

[0107] Petroleum coke: fixed carbon content ≥99%, ash content ≤0.5%, boron B, gadolinium Gd less than 0.1ppm, samarium Sm, europium Eu, cadmium Cd and lithium Li less than 0.5ppm, moisture ≤0.2%, sulfur content ≤ 0.2%;

[0108] Asphalt: ash content ≤0.2%, volatile content 40-70%, coking value 40-70%, softening point 160-200°C, quinoline insoluble content 20-25%, toluene insoluble content 25-55% ;

[0109] Step 2, ingredients, kneading

[0110] Put the petroleum coke and pitch into the kneader, the temperature is 350°C, and the kneading time is 150min.

[0111] Step three, isostatic pressing

[0112] Place th...

Embodiment 2

[0126] like figure 1 shown

[0127] 1. Raw materials: 60 parts by weight of petroleum coke with an average diameter of 8 μm and 40 parts by weight of pitch.

[0128] 2. Preparation method:

[0129] Step 1. Raw material selection

[0130] Choose from petroleum coke and pitch.

[0131] It mainly consists of the following raw materials and performance indicators:

[0132] Petroleum coke: fixed carbon content ≥99%, ash content ≤0.5%, boron B, gadolinium Gd less than 0.1ppm, samarium Sm, europium Eu, cadmium Cd and lithium Li less than 0.5ppm, moisture ≤0.2%, sulfur content ≤ 0.2%;

[0133] Asphalt: ash content ≤0.2%, volatile content 40-70%, coking value 40-70%, softening point 160-200°C, quinoline insoluble content 20-25%, toluene insoluble content 25-55% ;

[0134] Step 2, ingredients, kneading

[0135] Put petroleum coke and pitch into a kneader, the temperature is 250°C, and the kneading time is 200min.

[0136] Step three, isostatic pressing

[0137] Place the mixtu...

Embodiment 3

[0151] like figure 1 shown

[0152] 1. Raw materials: 40 parts by weight of petroleum coke with an average diameter of 5 μm and 60 parts by weight of pitch.

[0153] 2. Preparation method:

[0154] Step 1. Raw material selection

[0155] Choose from petroleum coke and pitch.

[0156]It mainly consists of the following raw materials and performance indicators:

[0157] Petroleum coke: fixed carbon content ≥99%, ash content ≤0.5%, boron B, gadolinium Gd less than 0.1ppm, samarium Sm, europium Eu, cadmium Cd and lithium Li less than 0.5ppm, moisture ≤0.2%, sulfur content ≤ 0.2%;

[0158] Asphalt: ash content ≤0.2%, volatile content 40-70%, coking value 40-70%, softening point 160-200°C, quinoline insoluble content 20-25%, toluene insoluble content 25-55% ;

[0159] Step 2, ingredients, kneading

[0160] Put the petroleum coke and pitch into the kneader, the temperature is 400°C, and the kneading time is 175min.

[0161] Step three, isostatic pressing

[0162] Place the ...

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Abstract

The invention relates to the technical field of graphite craft product processing, in particular to an isostatic graphite preparation process for craft product processing. The process comprises the following steps: raw material selection, stirring, mixing and kneading, forming, primary roasting, primary dipping, secondary roasting, secondary dipping, tertiary roasting and graphitization / purification. Vibration and vacuumizing treatment are carried out on a kneaded and ground mixture before isostatic compaction, air among powder of the mixture is removed, so influence on the density of a formedgraphite product in the isostatic compaction process is avoided, the density of a formed graphite product is improved, the quality of the formed graphite product is improved, and the technical problem that graphite products cannot be applied to artware processing due to density factors is solved.

Description

technical field [0001] The invention relates to the technical field of graphite craft product processing, in particular to an isostatic graphite preparation process for craft product processing. Background technique [0002] Graphite is an allotrope of carbon, which is gray-black, opaque solid, with a density of 2.25 grams per cubic centimeter, a melting point of 3652°C, and a boiling point of 4827°C. It has stable chemical properties, corrosion resistance, and is not easy to react with chemicals such as acids and alkalis. At 687°C, it burns in oxygen to produce carbon dioxide. It can be oxidized by strong oxidants such as concentrated nitric acid and potassium permanganate. It can be used as anti-wear agent, lubricant, high-purity graphite is used as a neutron moderator in atomic reactors, and can also be used to manufacture crucibles, electrodes, brushes, dry batteries, graphite fibers, heat exchangers, coolers, electric arc furnaces, Arc lamps, pencil refills, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/52C04B35/622
CPCC04B35/522C04B35/622C04B2235/6562C04B2235/6567C04B2235/77C04B2235/661C04B2235/96
Inventor 黄岱李贺刘涛杨华丰
Owner SINOSTEEL NEW MATERIAL ZHEJIANG
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