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Production method for isostatic pressure graphite

A production method, the technology of isostatic pressing, applied in the field of graphite, can solve the problems of complex production process of isostatic graphite, poor corrosion resistance mechanical properties, etc., and achieve improved thermal conductivity and corrosion resistance, improved machinability, and easy batch production The effect of chemical production

Inactive Publication Date: 2015-05-06
QINGDAO TAIHAODA CARBON MATERIAL
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Problems solved by technology

However, in the prior art, the production process of isostatic graphite is complicated, and the product has poor corrosion resistance and mechanical properties.

Method used

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Embodiment

[0013] The production method of isostatic graphite in this embodiment includes the following steps: (1) Calcining petroleum coke and pitch coke at 1300°C to remove water and volatile matter; (2) Using a vertical roller mill to grind the aggregate Coke is ground into a powder with an average particle size of 15 μm; (3) Put the ground powder and coal tar pitch binder into a heating kneader for kneading, so that a layer of asphalt is evenly attached to the surface of the powder coke particles. After the kneading is completed, Take out the paste and let it cool; (4) The paste is crushed and powdered by a vertical roller mill, and sieved into particles with a particle size of tens to hundreds of microns, mixed evenly, and used as a pressing material; (5) The raw materials are filled into the rubber mold, and the pressed powder is compacted by high-frequency electromagnetic vibration. After sealing, vacuumize to discharge the air between the powder particles, put it into a high-press...

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Abstract

The invention discloses a production method for isostatic pressure graphite. The method includes: calcining petroleum coke and pitch coke at 1300DEG C, then grinding aggregate coke into powder with an average particle size of 10-20 micrometers; adding the well ground powder and a coal tar pitch binder into a heating type kneading machine to conduct kneading, then taking out the paste material and cooling it; crushing and grinding the paste material by a vertical roller mill, and taking the powder as the profiling raw material; filling a rubber die with the raw material to compact the pressed powder, carrying out sealing and vacuum pumping, discharging the air among the powder particles, placing the material into a water loaded high pressure container, conducting pressurization to 100-200MPa, and performing pressing to obtain a cylindrical product; carrying out roasting, keeping the temperature difference in the furnace lower than 20DEG C, and controlling the heating rate of the heating process less than 1DEG C / h; heating the roasted product to 3000DEG C and conducting graphitization; and putting the graphitized product into a halogen gas and conducting heating to 2000DEG C to remove impurities by volatilization. The production process is simple, and is easy to realize mass production.

Description

[0001] technical field [0002] The invention belongs to the technical field of graphite, and in particular relates to a production method of isostatic graphite. [0003] Background technique [0004] Isostatic graphite is a new type of graphite material developed in the 1960s, which has a series of excellent properties. Compared with ordinary graphite, its structure is fine and dense, and its uniformity is good; its thermal expansion coefficient is very low, and it has excellent thermal shock resistance; it is isotropic; it has strong chemical corrosion resistance, good thermal conductivity and electrical conductivity; it has excellent mechanical properties Processing performance. However, in the prior art, the production process of isostatic graphite is complex, and the product has poor corrosion resistance and mechanical properties. [0005] Contents of the invention [0006] In order to overcome the above-mentioned technical problems existing in the prior art, the ...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 乔帅
Owner QINGDAO TAIHAODA CARBON MATERIAL
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