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A method for preparing needle coke

A technology for needle coke and raw materials, which is used in coke ovens, tar pitch/petroleum pitch/natural pitch processing, coking carbonaceous materials, etc. To achieve the effect of wide range of raw materials, low thermal expansion coefficient and simple process

Inactive Publication Date: 2017-03-08
乔光明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The filtration method is a method in which asphalt and a compound solvent are used to filter out quinoline insolubles at a certain temperature and viscosity. Although this method has a simple process and low energy consumption, it has strict requirements on the filter material and the process conditions are relatively harsh. Expensive and needs to be replaced often

Method used

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  • A method for preparing needle coke

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The softening point is 75°C, and the medium-temperature coal tar pitch with 4.8% quinoline insoluble matter is preheated to 200°C in the raw material preheating kettle 1 at a stirring speed of 70 rpm, and then pumped into the degassing column 2. The temperature is 280°C and the pressure is 300Pa for degassing treatment. The degassed material enters the raw material receiving tank 3 for buffering and heat preservation, and then pumps it to the molecular distillation column 4 for molecular distillation treatment. The distillation temperature is 390°C and the pressure is 0.01Pa. The material after molecular distillation is divided into 85% light phase and 15% heavy phase. The light phase component is refined pitch and enters the light phase receiving tank 6 as raw material for needle coke; the heavy phase component enters the heavy phase receiving tank 5 as high Softening point high carbon residue bitumen is used as binder bitumen. The obtained refined pitch enters the del...

Embodiment 2

[0029] The medium temperature coal tar pitch with a softening point of 75°C and quinoline insolubles of 4.8% is preheated to 200°C in the raw material preheating kettle 1 at a stirring speed of 80 rpm, and then pumped into the degassing column 2. The temperature is 270°C and the pressure is 600Pa for degassing treatment. The degassed material enters the raw material receiving tank 3 for buffering and heat preservation, and then pumps it to the molecular distillation column 4 for molecular distillation treatment. The distillation temperature is 390°C and the pressure is 1Pa. The material after molecular distillation is divided into 50% light phase and 50% heavy phase. The light phase component is refined pitch and enters the light phase receiving tank 6 as raw material for needle coke; the heavy phase component enters the heavy phase receiving tank 5 as high Softening point high carbon residue bitumen is used as binder bitumen. The obtained refined pitch enters the delayed coki...

Embodiment 3

[0031] The medium temperature coal tar pitch with a softening point of 75°C and quinoline insolubles of 4.8% is preheated to 180°C in the raw material preheating kettle 1 at a stirring speed of 100 rpm, and then pumped into the degassing column 2. The temperature is 260°C and the pressure is 600Pa for degassing treatment. The degassed material enters the raw material receiving tank 3 for buffering and heat preservation, and then pumps it to the molecular distillation column 4 for molecular distillation treatment. The distillation temperature is 350°C and the pressure is 100Pa. The material after molecular distillation is divided into 30% light phase and 70% heavy phase. The light phase component is refined pitch and enters the light phase receiving tank 6 as raw material for needle coke; the heavy phase component enters the heavy phase receiving tank 5 as high Softening point high carbon residue bitumen is used as binder bitumen. The obtained refined pitch enters the delayed c...

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Abstract

The invention discloses a method and a device of preparing a needle coke, and belongs to the technical field of needle coke preparation. The method disclosed by the invention is characterized by comprising the following steps: separating an asphalt raw material by virtue of a degasification column and a molecular distillation column, preheating the asphalt raw material, pumping the asphalt raw material in the degasification column and carrying out degasification treatment at a degasification temperature of 250-330 DEG C under an in-column pressure of 100-1000Pa, then pumping the degasified materials to the molecular distillation column, controlling a distillation temperature in the molecular distillation column to 300-400 DEG C and controlling a pressure to 0.01-100Pa, separating the materials into a light-phase component and a heavy-phase component in the molecular distillation column through a short-path distillation action, carrying out delayed coking on the light-phase component to obtain green coke, and calcining the green coke to obtain the needle coke. The method disclosed by the invention is capable of stably and accurately controlling the cutting amounts of the raw material components, thus flexibly adjusting the product quality, and furthest reserving ideal components. Moreover, the method is low in treatment temperature, rapid in material separation, and free from forming secondary quinoline undissolved substances.

Description

technical field [0001] A method for preparing needle coke belongs to the technical field of needle coke preparation. Background technique [0002] Needle coke is a high-quality carbon species vigorously developed in carbon materials in the 1970s, and is the main raw material for the production of high-power and ultra-high-power graphite electrodes. Due to the good graphitization properties of needle coke, high-power and ultra-high-power electrodes produced with it have excellent electrical conductivity, thermal shock resistance and oxidation resistance. Compared with ordinary electrodes, the ultra-high power electrodes made of needle coke can shorten the smelting time by 30%~50%, save electricity by more than 10%~20%, and increase the production capacity by 1.3 times. The economic benefits are very significant. . [0003] The preparation process of needle coke includes three processes: raw material pretreatment, delayed coking and calcination, among which raw material pret...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B55/00C10C3/00C10C3/06
CPCC10B55/00C10C3/002C10C3/06
Inventor 乔光明
Owner 乔光明
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