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A method for preparing coal-based needle coke raw materials

A needle coke raw material and coal-based technology, which is applied to coking carbonaceous materials, coke ovens, tar processing through distillation, etc., can solve the problems of high QI content and high production cost of coal-based needle coke raw materials, and reduce production , Improve the recovery rate, reduce the effect of recycling energy consumption

Active Publication Date: 2020-09-15
SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problems of high production cost and high QI content in the obtained coal-based needle coke raw material in the existing method for preparing coal-based needle coke raw material, so as to provide a preparation Coal-based needle coke raw material method, the method has high comprehensive economic benefits, and the prepared QS-TI and QI content is low

Method used

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  • A method for preparing coal-based needle coke raw materials
  • A method for preparing coal-based needle coke raw materials
  • A method for preparing coal-based needle coke raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Mix medium and low temperature coal tar and coker oil gas, preheat it and send it to the first fractionation tower, and fractionate to obtain the top oil gas, the first line distillate (150-270°C), the second line distillate (270-360°C) ℃), coal tar pitch, and collect the distillate oil of the first measuring line to obtain the aromatic solvent. Mix the oil gas at the top of the first fractionation tower with the second line distillate (270-360°C), preheat and send it to the hydrogenation reactor, set the temperature at 320°C, and the pressure at 14MPa. The mixture of oil gas and second line distillate oil is subjected to hydrotreating, and the product obtained after hydrotreating is sent to the second fractionating tower, and the distillate oil at 130-310°C obtained by fractional distillation is an aliphatic solvent. The above-mentioned aromatic solvent and aliphatic solvent are mixed online according to a mass ratio of 7:3 to obtain a solvent for preparing coal-based ...

Embodiment 2

[0034]Mix medium and low temperature coal tar and coker oil gas, preheat it and send it to the first fractionation tower, and fractionate to obtain the top oil gas, the first line distillate (150-270°C), the second line distillate (270-360°C) ℃), coal tar pitch, and collect the distillate oil of the first measuring line to obtain the aromatic solvent. Mix the oil gas at the top of the first fractionation tower with the second line distillate (270-360°C), preheat and send it to the hydrogenation reactor, set the temperature at 250°C, and the pressure at 15MPa. The mixture of oil gas and second line distillate oil is subjected to hydrotreating, and the product obtained after hydrotreating is sent to the second fractionating tower, and the distillate oil at 130-310°C obtained by fractional distillation is an aliphatic solvent. The above-mentioned aromatic solvent and aliphatic solvent are mixed online according to a mass ratio of 6:4 to obtain a solvent for preparing coal-based n...

Embodiment 3

[0037] Mix medium and low temperature coal tar and coker oil gas, preheat it and send it to the first fractionation tower, and fractionate to obtain the top oil gas, the first line distillate (150-270°C), the second line distillate (270-360°C) ℃), coal tar pitch, and collect the distillate oil of the first measuring line to obtain the aromatic solvent. Mix the oil gas at the top of the first fractionation tower with the second line distillate (270-360°C), preheat and send it to the hydrogenation reactor, set the temperature at 390°C, and the pressure at 12MPa. The mixture of oil gas and second line distillate oil is subjected to hydrotreating, and the product obtained after hydrotreating is sent to the second fractionating tower, and the distillate oil at 130-310°C obtained by fractional distillation is an aliphatic solvent. Stir and mix the above aromatic solvent and aliphatic solvent in a tank at a mass ratio of 5:5 to obtain a solvent for preparing coal-based needle coke. ...

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Abstract

The invention belongs to the technical field of preparation of needle-shaped coke and discloses a method for preparing a coal-series needle-shaped coke raw material. According to the method provided by the invention, a specific solvent is used for treating coal tar asphalt and a light phase is separated and is distilled to obtain the coal-series needle-shaped coke raw material; the distillation amount of the solvent is greater than or equal to 45 percent (w / w) before the temperature is 200 DEG C and the solvent contains more light-weight fractions with the temperature lower than or equal to 200 DEG C; compared with a solvent containing a lot of heavy-weight fractions, the solvent used by the method has relatively low density (0.86 to 0.92g / cm<3>); the light phase which is formed by mixingthe solvent with the coal tar asphalt is more easily separated from a heavy phase; the solvent contains a lot of the light-weight fractions, so that the solvent is more easily separated from the coal-series needle-shaped coke raw material in a decompression and distillation process; and the recycling energy consumption of the solvent is reduced and the recycling rate of the solvent is increased.

Description

technical field [0001] The invention belongs to the technical field of needle coke preparation, and in particular relates to a method for preparing coal series needle coke raw materials. Background technique [0002] Needle coke is a high-quality carbon material. It is named for its elongated needle-like structure after crushing. It has good orientation, strong electrical and thermal conductivity, and is the main raw material for manufacturing advanced graphite electrodes. It is produced with needle coke The ultra-high power graphite electrode has the advantages of low resistivity, high bulk density, high mechanical strength, small thermal expansion coefficient, and good thermal shock resistance. Needle coke graphitized products are widely used in electric furnace steelmaking electrodes, nuclear reactor deceleration materials and rocket technology and other fields. [0003] The needle coke currently produced can be divided into two categories: petroleum-based needle coke an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B55/00C10C1/04
CPCC10B55/00C10C1/04
Inventor 赵宁李秀辉毛世强吕子胜王彦军述子清王雄雄刘宁姬锐刘伟赵修洪
Owner SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND