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Preparation method of fine graphite

A fine structure, graphite technology, applied in the field of fine structure graphite preparation, can solve the problems of easy formation of cracks, low qualified rate of finished products, etc., to solve the crack problem, shorten the production cycle, and solve the effect of product cracks.

Inactive Publication Date: 2010-03-17
李公成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of fine-structured graphite to overcome the defects of low qualified rate of finished products and easy formation of cracks in existing methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of fine structure graphite, coke fine powder and asphalt fine powder are fully mixed with the mass ratio dry method of 10:1, and the mixture is in the airtight mold that vacuum degree is 0.005Mpa, temperature is 350 ℃ (mold is cylindrical , diameter 600mm, height 600mm) heating for 7h, while adding vibration until the density of the mixture is not less than 1.8g / cm 3 ; After that, apply 50t pressure to the mold and gradually raise the temperature to 900°C to sinter to obtain fine-structure graphite. The entire heating and sintering process lasts for 18 hours, and is heated and roasted in a resistance furnace.

Embodiment 2

[0023] The preparation method of fine structure graphite, coke fine powder and asphalt fine powder are fully mixed with the mass ratio dry method of 4: 1, and the mixture is in the airtight mold that vacuum degree is 0.009Mpa, temperature is 250 ℃ (mold is cylindrical , diameter 300mm, height 600mm) heating for 5 hours, while adding vibration until the density of the mixture is not less than 1.8g / cm 3 ; Then apply 30t pressure to the mold and gradually raise the temperature to 1200°C to sinter to obtain fine-structure graphite. The entire heating and sintering process lasts for 10 hours, and is heated and roasted in a resistance furnace.

Embodiment 3

[0025] The preparation method of fine structure graphite, coke fine powder and asphalt fine powder are fully mixed with the mass ratio dry method of 7: 3, and the mixture is in the airtight mold that vacuum degree is 0.008Mpa, temperature is 300 ℃ (mold is cylindrical , diameter 700mm, height 600mm) heating for 8 hours, while adding vibration until the density of the mixture is not less than 1.8g / cm 3 ; After that, apply 40t pressure to the mold and gradually raise the temperature to 1000°C to sinter to obtain fine-structure graphite. The whole heating and sintering process lasts for 20 hours, and is heated and roasted in a resistance furnace.

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Abstract

The invention relates to a preparation method of fine graphite, belonging to the technical field of graphite material. The method comprises the following steps: performing dry mixing to coke fine powder and asphalt fine powder in a weight ratio of 10:1-7:3, heating the mixed powders for 4-8h in a sealed environment with the temperature of 250-350 DEG C and the vacuum degree of no less than 0.005 MPa while vibrating the mixed material to ensure that the density is not less than 1.8g / cm<3>; then adding 30-50t of pressure to the sealed environment, and gradually heating to 900-1200 DEG C to sinter and obtain fine graphite. The preparation method of the invention has simple process, convenient operation, short production cycle and low production cost; the prepared product has better overall volume density, asphalt coking value and qualification rate of the finished products; in addition, the production process is cleaner, the production environment is better and the influence of the production to the dust, atmosphere and water body can be effectively controlled.

Description

(1) Technical field [0001] The invention belongs to the technical field of graphite materials, in particular to a preparation method of fine-structure graphite. (2) Background technology [0002] At present, the production of fine structure graphite mainly adopts the traditional kneading and sintering method. Its main process route is: first produce coke fine powder and melt pitch, then knead coke fine powder and melt pitch, and then carry out sheet rolling and secondary powder milling, dry powder cold pressing, repeated roasting, dipping and roasting, and finally graphitization Made of fine structure graphite products. [0003] The main defect of above-mentioned method is: 1, during the kneading process of coke fine powder and melting pitch, because fine powdery solid coke powder and the bitumen with bigger viscosity of molten shape are when implementing kneading, very easily form pitch permeability The unsatisfactory situation and the difficulty in improving the degree o...

Claims

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Application Information

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IPC IPC(8): C01B31/04C04B35/528C04B35/622
Inventor 李公成
Owner 李公成
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