Continuous sedimentation process for production of needle coke

A needle coke and process technology, which is applied in the processing of tar pitch/petroleum pitch/natural pitch, processing tar pitch/petroleum pitch/natural pitch by distillation, and processing tar pitch/petroleum pitch/natural pitch by selective extraction, etc. It can solve the problems of long-term operation, blockage of equipment and pipelines, and large floor space, so as to achieve the effect of facilitating long-term operation, reducing equipment blockage and reducing floor space.

Inactive Publication Date: 2009-09-16
SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this process are: many equipments, large floor area, large investment, complex operation, and easy to ca

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix aliphatic hydrocarbon solvent oil and aromatic hydrocarbon solvent oil evenly in a weight ratio of 1, and preheat it to 150°C, and then use a pump to mix the preheated coal tar soft pitch with a weight ratio of 50kg / hour 1:1 is mixed, the mixed oil enters the sedimentation separation tank at a speed of 100kg / hour, the residence time of the mixed oil in the sedimentation separation tank is controlled to be about 8 hours, and the light phase that flows out is distilled to obtain qualified quinoline insolubles Refined asphalt is used as a raw material for the production of needle coke.

Embodiment 2

[0021] Mix kerosene and washing oil evenly at a weight ratio of 1, preheat it to 150°C, and then use a pump at a speed of 50kg / hour to mix the preheated coal tar soft asphalt with a weight ratio of 0.9:1 The mixed oil enters the settling and separating tank at a rate of 100kg / hour, and the residence time of the mixed oil in the settling and separating tank is controlled to be about 8 hours, and the light phase flowing out is then distilled to obtain qualified refined pitch with quinoline insolubles. As a raw material for the production of needle coke.

Embodiment 3

[0023] Aliphatic hydrocarbon solvent oil and aromatic hydrocarbon solvent oil are mixed uniformly at a weight ratio of 0.6:1, and preheated to 100°C, and then pumped at a speed of 50kg / hour with the preheated coal tar soft asphalt by weight The ratio is 1.2:1 for mixing, the mixed oil enters the sedimentation separation tank at a speed of 100kg / hour, the residence time of the mixed oil in the sedimentation separation tank is controlled to be about 8 hours, and the light phase that flows out is distilled to obtain quinoline insoluble Qualified refined asphalt is used as the raw material for the production of needle coke.

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Abstract

The invention relates to a continuous sedimentation process for production of needle coke. Under the continuous condition of in-out materials, the process carries out settling separation on an insoluble substance of quinoline to obtain a qualified light phase of the insoluble substance of the quinoline. The mixed ratio of an aliphatic solvent to an aromatic solvent is (0.6-1.2) to 1; the mixed ratio of a mixed solvent to soft coal-tar asphalt is (0.6-1.2) to 1; the mixed oil is pumped into settling separation equipment by a pump for the settling separation; light liquid slowly rises; and after the insoluble substance of the quinoline reaches the requirement, the light liquid is continuously discharged from the upper part and distilled to obtain refined asphalt. The continuous sedimentation process has the advantages that the prior intermittent sedimentation process is improved into the continuous sedimentation process, namely the in-out materials are processed under the continuous operating condition. The continuous operation can simplify operation, reduce equipment, the floor space and the blocking of the equipment, and is favorable for long-period operation of the process.

Description

technical field [0001] The invention relates to a settling process for a raw material pretreatment unit in needle coke production. Background technique [0002] Needle coke is a high-quality carbon material, named for its elongated needle-like structure after crushing. Needle coke has a metallic luster on the outside and a layered structure inside. It has good orientation, electrical conductivity, and thermal conductivity. Therefore, it is the main raw material for manufacturing ultra-high-power electrodes for steelmaking. Using ultra-high-power electrode steelmaking, the smelting time can be shortened by 2 / 3, and the power consumption can be reduced by 50%. [0003] Needle coke production consists of three units, namely raw material pretreatment unit, coking unit and calcination unit. [0004] Years of experimental research results show that: needle coke raw materials require high content of aromatics, low content of quinoline insolubles (<0.3%), and low heterocyclic c...

Claims

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Application Information

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IPC IPC(8): C10C3/00C10C3/08C10C3/06C09J195/00
Inventor 彭莉于洪武王磊
Owner SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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