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A method for preparing needle coke by using three-stage tandem refining raw materials

A three-stage series, needle coke technology, applied in coke ovens, coking carbonaceous materials, petroleum industry and other directions, can solve the problems of incomplete removal of oxygen elements, high cost of coal tar raw material modification methods, and achieve low cost, The effect of good uniformity and simple modification process

Active Publication Date: 2021-03-16
陕西榆能集团能源化工研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of high cost of coal tar raw material modification method and incomplete oxygen removal when using the existing coal tar to prepare needle coke, the present invention proposes a three-stage series refining raw material to prepare needle coke Methods

Method used

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  • A method for preparing needle coke by using three-stage tandem refining raw materials
  • A method for preparing needle coke by using three-stage tandem refining raw materials
  • A method for preparing needle coke by using three-stage tandem refining raw materials

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Embodiment 1

[0046]A method for preparing needle coke with three-stage series-connected refining raw materials according to the present embodiment, the steps are:

[0047] Take 2.5kg of medium and low temperature coal tar and put it in the rectification reactor for fraction cutting, and cut out the pitch of 300-400 ℃ fraction, its softening point is 60 ℃, the aromaticity is f A is 0.7; take 150 g of the cut asphalt, transfer it into an autoclave, and under the air flow rate of 15 L / h, raise the temperature to 160 ℃ at a heating rate of 3 ℃ / min and keep it for 3 hours to prepare modified asphalt; give Nitrogen was continuously introduced into the autoclave for 8 minutes to replace the air in the autoclave; in the sand bath environment, 100g of modified asphalt and 10g of modifier were mixed and placed in the autoclave, maintaining a pressure of 1Mpa, At a stirring rate of 100r / min, the temperature was raised to 110°C at a heating rate of 4°C / min, and the phenolic resin macromolecules in the...

Embodiment 2

[0052] A method for preparing needle coke with three-stage series-connected refining raw materials according to the present embodiment, the steps are:

[0053] Take 2.5kg of medium and low temperature coal tar and put it in the rectification reactor for fraction cutting, and cut out the pitch of 300-400 ℃ fraction, its softening point is 60 ℃, the aromaticity is f A is 0.7; take 150g of the cut asphalt, transfer it into an autoclave, and under the air flow rate of 15L / h, heat it up to 130°C at a heating rate of 3°C / min and keep it for 3 hours to prepare modified asphalt; give Nitrogen was continuously introduced into the autoclave for 8 minutes to replace the air in the autoclave; in the sand bath environment, 100g of modified asphalt and 10g of modifier were mixed and placed in the autoclave, maintaining a pressure of 1Mpa, At a stirring rate of 100r / min, the temperature was raised to 110°C at a heating rate of 4°C / min, and the phenolic resin macromolecules in the modified as...

Embodiment 3

[0058] A method for preparing needle coke with three-stage series-connected refining raw materials according to the present embodiment, the steps are:

[0059] Take 2.5kg of medium and low temperature coal tar and put it in the rectification reactor for fraction cutting, and cut out the pitch of 300-400 ℃ fraction, its softening point is 60 ℃, the aromaticity is f A is 0.7; take 150g of the cut asphalt, transfer it into the autoclave, under the oxygen flow rate of 10L / h, heat up to 110 ℃ at a heating rate of 3 ℃ / min, hold for 3 hours, prepare modified asphalt; give Inert gas was continuously fed into the autoclave for 8 minutes to replace the oxygen in the autoclave; in the sand bath environment, 100g of modified asphalt and 10g of modifier were mixed and placed in the autoclave to maintain a pressure of 1Mpa , 100r / min stirring speed, heat up to 110°C at a heating rate of 4°C / min, discharge the macromolecular intolerant of phenolic resin in the modified asphalt from the botto...

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Abstract

The invention proposes a method for preparing needle coke using three-stage series refined raw materials, which belongs to the technical field of needle coke preparation. The preparation method includes (1) refining raw materials; (2) thermal polymerization; (3) calcination, preparation Needle coke. The softening temperature of the semi-coke body of the present invention is within a suitable temperature range, so that the semi-coke body has better fluidity and can be maintained for a longer time to form a better wide-area streamlined semi-coke body. It has better system viscosity and improves the coking quality of needle coke.

Description

technical field [0001] The invention belongs to the technical field of needle coke preparation, and in particular relates to a method for preparing needle coke by using three-stage series refining raw materials. Background technique [0002] Needle coke is an important raw material for carbon industry. It has the advantages of high density, low resistivity, low thermal expansion coefficient, high mechanical strength, good thermal shock resistance and good graphitization performance. It is widely used in high-power electrodes and In the production of ultra-high power electrodes. The factors affecting the formation of high-quality needle coke include raw material composition, thermal polymerization process conditions and calcination process conditions. Among them, the most important factor is the composition of raw materials, because the composition of raw materials will affect the formation process of carbonization to form mesophase and the viscosity of the system in the pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B55/00C10B57/08
CPCC10B55/00C10B57/08
Inventor 黄晔高生辉毕亚军田亚飞高峰李立郝巧娥田育成崔楼伟李冬
Owner 陕西榆能集团能源化工研究院有限公司
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