Method for preparing needle coke by coal-tar asphalt

Abstract

The invention relates to a method for preparing needle coke by coal-tar asphalt, using the coal-tar asphalt with abundant resource as raw material. The apparatuses including a beaker, an ultrasonic cleaner, a microwave oven, a high temperature furnace, a reaction kettle, a glass test tube, an enameled copper wire, a direct current power supply, a nitrogen bottle, a vacuum pump, an electric cabinet and the like are used to prepare black crystal needle coke by the working procedures of heating and fusion, ultrasonic activation, microwave catalysis, magnetic field induction, high temperature calcinations and the like; and then needle coke is generated by fusing at 150 DEG C, ultrasonically activating at 20 DEG C, catalyzing by microwave at 200 DEG C, inducing by a magnetic field at 420 DEG C, and calcinating at 940 DEG C. The chemical and physical properties of the needle coke are stable; the intensity, the toughness and the high temperature resistance of the needle coke can be increased by 26%; and the product yield is up to 78%. The needle coke can be matched with a plenty of chemical substances to make into a plenty of industrial products such as high temperature-resistant electrode and the like. The preparation method has short technological processes, and is safe, stable and reliable. The method is an ideal method for preparing carbon material crystal needle coke by coal-tar asphalt.

Description

technical field [0001] The invention relates to a method for preparing needle coke from coal tar pitch, which belongs to the technical field of the method and application of carbon material needle coke prepared from organic compound coal tar pitch. Background technique [0002] Needle coke is one of the most important materials in the carbon industry. Its grain morphology is needle-shaped, with obvious fiber structure and high anisotropy. Needle coke has the advantages of low thermal expansion coefficient, good graphitization performance, small resistivity, excellent electrical conductivity, high heat resistance and mechanical strength, good oxidation resistance, and low consumption. Ideal aggregate for high power electrodes. [0003] Coal tar pitch, referred to as coal tar pitch, is an important raw material for the preparation of needle coke. my country has abundant coal resources. The use of coal and coal tar pitch to prepare needle coke has the advantages of abundant ma...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the raw materials for preparing needle coke use petroleum pitch, and the preparation of needle coke with coal tar pitch is still in its infancy. Although the theory of carbonaceous mesophase is relatively mature, the formation, growth, fusion , The whole process of accumulation has been widely recognized, but the mechanism of action of each fraction in coke formation is still unclear, and it is still at the stage of perceptual understanding. There are still many deficiencies in the preparation process, which need further research, for example, Needle coke has low anisotropy, poor structural order, unstable thermal expansion coefficient and electrical conductivity, etc., which cannot meet the needs of ultra-high power electrodes.

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