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Production method for producing coal-series needle-shaped coke by utilizing coal tar at maximum

A technology for coal tar and needle coke, which is applied in the field of maximizing the use of coal tar to produce coal-based needle coke, can solve the problems of comprehensive utilization of raw materials, difficulty in solvent recovery, and degradation of solvent performance, so as to reduce energy consumption for recovery and improve performance. The overall utilization rate and the effect of improving the recovery rate

Active Publication Date: 2019-02-22
SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problems of difficult solvent recovery, no comprehensive utilization of raw materials, and performance degradation after repeated solvent recovery and utilization in the existing process for preparing coal-based needle coke, so as to provide a maximum utilization Method for producing coal-measure needle coke from coal tar

Method used

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  • Production method for producing coal-series needle-shaped coke by utilizing coal tar at maximum
  • Production method for producing coal-series needle-shaped coke by utilizing coal tar at maximum
  • Production method for producing coal-series needle-shaped coke by utilizing coal tar at maximum

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Effect test

Embodiment 1

[0036]After mixing medium and low temperature coal tar and coker oil gas, preheating, it is sent to the first fractionation tower for atmospheric distillation, and fractionated to obtain the top oil gas, the first line distillate (150-270°C), the second line distillate ( 270~360 DEG C), coal tar pitch, and collect the distillate oil of the first measurement line to obtain the aromatic solvent. According to the hydrocarbon composition method, the total aromatics are 70~80% by weight. Mix the oil and gas at the top of the tower, the distillate oil of the second measuring line (270-360°C) and the dephenolized oil, and send it to the hydrogenation reactor after preheating, set the temperature at 320°C, and the pressure at 14MPa. The product is sent to the second fractionating tower for atmospheric distillation, and the 130-310°C distillate oil obtained by the fractionation is an aliphatic solvent, and its total saturated hydrocarbons are 95-99% by weight as determined according to ...

Embodiment 2

[0039] After mixing medium and low temperature coal tar and coker oil gas, preheating, it is sent to the first fractionation tower for atmospheric distillation, and fractionated to obtain the top oil gas, the first line distillate (150-270°C), the second line distillate ( 270~360 DEG C), coal tar pitch, and collect the distillate oil of the first measurement line to obtain the aromatic solvent. According to the hydrocarbon composition method, the total aromatics are 70~80% by weight. Mix the oil and gas at the top of the tower, the second measuring line distillate oil (270-360°C) and dephenolized oil, preheat and send it to the hydrogenation reactor, set the temperature at 250°C, and the pressure at 15MPa, and process the hydrotreated The product is sent to the second fractionating tower for atmospheric distillation, and the 130-310°C distillate oil obtained by the fractionation is an aliphatic solvent, and its total saturated hydrocarbons are 95-99% by weight as determined acc...

Embodiment 3

[0042] After mixing medium and low temperature coal tar and coker oil gas, preheating, it is sent to the first fractionation tower for atmospheric distillation, and fractionated to obtain the top oil gas, the first line distillate (150-270°C), the second line distillate ( 270~360 DEG C), coal tar pitch, and collect the distillate oil of the first measurement line to obtain the aromatic solvent. According to the hydrocarbon composition method, the total aromatics are 70~80% by weight. Mix the top oil gas, the second measuring line distillate oil (270-360°C) and dephenolized oil, preheat and send it to the hydrogenation reactor, set the temperature at 390°C, and the pressure at 12MPa, and the hydrotreated The product is sent to the second fractionating tower for atmospheric distillation, and the 130-310°C distillate oil obtained by the fractionation is an aliphatic solvent, and its total saturated hydrocarbons are 95-99% by weight as determined according to the hydrocarbon compos...

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Abstract

The invention belongs to the technical field of coal chemical industry and discloses a production method for producing coal-series needle-shaped coke by utilizing coal tar at maximum. The method comprises the following steps: after mixing coal tar asphalt and a solvent, separating to obtain a light phase and a heavy phase; removing the solvent in the light phase to obtain purified coal tar asphalt; carrying out coking treatment on the purified coal tar asphalt to obtain the coal-series needle-shaped coke. The solvent used by the method contains more light-weight fractions with the temperaturelower 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; the light phase which is formed by mixing the solvent with the coal tar asphalt is more easily separated from the heavy phase; the solvent contains a lot of the light-weight fractions, so that the solvent is more easily separated from thepurified coal tar asphalt when the solvent in the light phase is removed; the recycling energy consumption of the solvent is reduced and the recycling rate of the solvent is increased; and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry and relates to the production of needle coke, in particular to a method for maximizing the use of coal tar to produce coal series needle coke. 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 i...

Claims

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Application Information

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IPC IPC(8): C10B55/00C10C1/04
CPCC10B55/00C10C1/04
Inventor 赵宁毛世强李秀辉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
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