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Production method of conductive carbon black for environment-friendly cable shielding material

A cable shielding, conductive carbon black technology, applied in chemical instruments and methods, fibrous fillers, inorganic pigment treatment, etc. question

Active Publication Date: 2021-02-05
山东联科新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Conductive carbon black is a key material that determines the electrical properties of cable shielding materials. At present, the quality of conductive carbon black in my country has basically met the application requirements of conventional medium-voltage and low-voltage cross-linked cables, but for environmentally friendly non-cross-linked cable shielding materials Said that the processing technology of this kind of non-crosslinked shielding material is extruded above 200 °C, which requires high purity of carbon black, good high temperature resistance, and good electrical conductivity at high temperatures; due to low high temperature conductivity, poor stability, etc. , most of the existing carbon black cannot meet the application requirements, the current conductive carbon black has a low structure, the carbon black chain branch is not developed enough and is easy to break, and the conductive channel is easily destroyed when it is applied in the cable, resulting in high resistivity. Moreover, the high temperature stability of carbon black is poor and the purity is relatively low, especially when extruded at high temperature, it will cause melt fracture and rough surface on the surface of polymer composite materials.

Method used

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  • Production method of conductive carbon black for environment-friendly cable shielding material
  • Production method of conductive carbon black for environment-friendly cable shielding material
  • Production method of conductive carbon black for environment-friendly cable shielding material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: a kind of production method of environment-friendly type cable shielding material conductive carbon black comprises the following steps:

[0029] 1) Raw material control: the raw material oil used by the raw material is a mixed oil of anthracene oil and ethylene tar, wherein the weight percentage of anthracene oil and ethylene tar is 8:2, control potassium ion content=2ppm in the anthracene oil and ethylene tar, sodium Ion content=10ppm; Toluene insolubles in anthracene oil=0.5%, density ρ20 is 1.13 / cm3, viscosity E80=1.5, moisture=1%, fraction before 210°C=5%, fraction before 360°C=60%; The characteristics of ethylene tar in the raw oil are: toluene insolubles=1.0%, density ρ20 is 1.04= / cm3, viscosity E80=9, moisture=0.5%, fraction before 210°C=20%, fraction before 360°C =70%; Environmentally friendly non-cross-linked cable shielding materials have higher requirements on high-temperature electrical properties of products, and high-temperature electrical p...

Embodiment 2

[0039] Embodiment 2: Compared with Example 1, the main difference is that the characteristics of anthracene oil in the raw oil are: toluene insolubles=0.3%, density ρ20 is 1.15g / cm3, viscosity E80=1.3, moisture=0.5%, The fraction before 210°C=3%, the fraction before 360°C=70%; the characteristics of ethylene tar in the raw material oil are: toluene insolubles=0.3%, density ρ20 is 1.1g / cm3, viscosity E80=7, moisture = 0.3%, the fraction before 210°C = 17%, the fraction before 360°C = 75%; the anthracene oil is extracted from coal tar, and the ethylene tar is ethylene cracking raw material and high temperature product in steam cracking process products of condensation;

[0040] In the process of cracking and preparing carbon black, in the multi-stage reactor, the volume ratio of air and natural gas is adjusted to 20:1, the combustion temperature in the combustion section of the reactor is increased to 2500°C, and the flow rate of raw material oil is 4000kg / h. The internal flue ...

Embodiment 3

[0042] Embodiment 3: The difference from Example 1 is: the characteristics of anthracene oil in the raw oil are: toluene insolubles=0.35%, density ρ20 is 1.14g / cm3, viscosity E80=1.1, moisture=0.7%, 210°C The fraction before = 4%, the fraction before 360°C = 75%; the characteristics of ethylene tar in the feed oil are: toluene insolubles = 0.5%, density ρ20 is 1.05g / cm3, viscosity E80 = 6, moisture = 0.35 %, the fraction before 210°C=15%, the fraction before 360°C=80%;

[0043] Analyzing by gas chromatography the content ≥ 2% components in the anthracene oil of the above characteristic specifications, whether these components in the anthracene oil react sufficiently during the high-temperature cracking reaction will affect the formation of functional groups on the surface of carbon black and the surface purity, and affect the carbon black. Black surface properties, it can be found that most of the rings with ≥ 2% components are between 2-4. Such a component composition ensures...

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Abstract

The invention discloses a production method of conductive carbon black for an environment-friendly cable shielding material, and mainly relates to the field of carbon black production. The method comprises the steps of raw material control, raw material pretreatment, carbon black cracking preparation, carbon black collection, binder addition and granulation, carbon black drying and desorption, carbon black refining and volume resistivity test. The preparation method has the beneficial effects that the produced carbon black is good in high temperature resistance, good in electrical property athigh temperature, excellent in high-temperature extrusion property and higher in purity, and the use requirements of the environment-friendly non-crosslinked cable shielding material are fully met.

Description

technical field [0001] The invention relates to the field of carbon black production, in particular to a method for producing conductive carbon black for environment-friendly cable shielding materials. Background technique [0002] Conductive carbon black is a key material that determines the electrical properties of cable shielding materials. At present, the quality of conductive carbon black in my country has basically met the application requirements of conventional medium-voltage and low-voltage cross-linked cables, but for environmentally friendly non-cross-linked cable shielding materials Said that the processing technology of this kind of non-crosslinked shielding material is extruded above 200 °C, which requires high purity of carbon black, good high temperature resistance, and good electrical conductivity at high temperatures; due to low high temperature conductivity, poor stability, etc. , most of the existing carbon black cannot meet the application requirements, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/50C09C3/04
CPCC09C1/50C09C3/006C09C3/043C09C3/045
Inventor 陈有根江平开张军张友伟赵国刚张富泽秦国明侯开太姜宝环申伟涛
Owner 山东联科新材料有限公司
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