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Preparation method and preparation device of isotropic pitch coke

A production method and isotropic technology, applied in the field of isotropic pitch coke production methods and production devices, can solve the problems of lengthy isotropic graphite process, achieve low porosity, short residence time, and avoid lengthy Effect

Inactive Publication Date: 2017-07-28
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of this application is to provide a method and device for producing isotropic pitch coke to solve the problem of lengthy technical process for producing isotropic graphite in the prior art

Method used

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  • Preparation method and preparation device of isotropic pitch coke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] use figure 1 The production device shown produces isotropic pitch coke, and the specific production process includes:

[0044] Heating coal liquefied asphalt with a softening point of 150°C to 300°C to obtain molten asphalt, transported to the atomizer by the feed pump for atomization, and then enters the pyrolysis tower for contact carbonization with high-temperature gas at a temperature of 1200°C to obtain isotropic Pitch coke, and the isotropic pitch coke that is not mixed with oil and gas passes through the first outlet of the pyrolysis tower to the pitch coke collection equipment, and the mixture of pyrolyzed oil gas, high-temperature gas and isotropic pitch coke is discharged from the pyrolysis tower The second outlet discharges into a high temperature cyclone separator.

[0045] The cyclone separator separates isotropic pitch coke from oil gas and high-temperature gas, and the separated isotropic pitch coke reaches the pitch coke collection equipment through the...

Embodiment 2

[0047] The difference from Example 1 is that the pitch is coal tar pitch, its softening point is 270°C, and it melts at 380°C to become molten pitch, and the temperature of the high-temperature gas is 1400°C.

Embodiment 3

[0049] The difference from Example 1 is that the asphalt is petroleum asphalt, its softening point is 200°C, and it melts at 350°C to become molten asphalt, and the temperature of the high-temperature gas is 1100°C.

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Abstract

The invention provides a preparation method and a preparation device of isotropic pitch coke. The preparation method includes the steps of S1, subjecting molten pitch to atomization to obtain atomized pitch; S2, pyrolyzing the atomized pitch by contacting with high-temperature gas to obtain isotropic pitch coke, wherein the temperature of the high-temperature gas ranges from 500 DEG C to 1400 DEG C. The molten pitch is atomized and carbonized, the retention time for high-temperature carbonizing stage of pitch is short, and the intermediate phase process is omitted so that the isotropic pitch coke is obtained directly; further, the isotropic pitch coke can be utilized directly for producing isotropic graphite, the procedure of grinding and fining is omitted, the technique is simplified, and the lengthiness of processing flow is avoided; in addition, the isotropic pitch coke has low porosity which is favorable for improving strength of graphite.

Description

technical field [0001] The present application relates to the field of chemical industry, in particular, to a method and device for producing isotropic pitch coke. Background technique [0002] Isotropic graphite is widely used in semiconductor industry, photovoltaic industry, electric discharge machining, metal continuous casting, optical fiber, mold manufacturing, aerospace and nuclear industry. It is an irreplaceable material closely related to today's high-tech development. . [0003] However, the current process is difficult to produce isotropic pitch coke, so anisotropic pitch coke is prepared first, and then anisotropic pitch coke is used to prepare isotropic graphite. The specific main process is: using petroleum coke or pitch Coke, due to the long residence time of petroleum coke and pitch coke in the carbonization process, anisotropic coke is formed and fused through the formation of mesophase, and then the anisotropic pitch coke is finely granulated, and the anis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B55/00C10C3/00C01B32/205
CPCC10B55/00C10C3/00
Inventor 向柠舒歌平李克健章序文常鸿雁程时富王洪学
Owner CHNA ENERGY INVESTMENT CORP LTD
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