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Preparation method of anti-lighting and resistance-reducing grounding module material

A grounding module and resistance-reducing technology, which is applied in the field of carbon materials, can solve the problems of affecting product quality and electrical conductivity, cracks easily caused by the shrinkage of roasted products, and insufficient green body density, so as to achieve mass production, stable resistance, physical and chemical powerful effect

Inactive Publication Date: 2017-07-21
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A number of patents in my country use graphite as the ground electrode, but due to raw materials and processes, its conductivity is affected by the season; in the preparation process, the raw materials need to be kneaded, and the kneaded paste is lumpy and has poor fluidity, resulting in The bulk density of the formed green body is not enough; cracks are prone to occur when the roasted product shrinks during the polycondensation reaction, which affects the quality and electrical conductivity of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Calcined petroleum coke is used as aggregate, special graphite powder is used as powder, ion slow-release agent is used as additive, and medium-temperature coal tar pitch is used as binder.

[0038] The true density of petroleum coke after calcining the aggregate is ≥2.08 / cm3, the ash content is ≤0.25%; the special graphite powder for powder is preferably 30 μm in particle size, resistivity ≤8.0 μΩm, flexural strength ≥22Mpa, compressive strength ≥32Mpa, ash content ≤ 0.25%; the density of the additive ion slow-release agent is 0.96g / cm3, the resistivity is 0.75Ω·m, the pH value is 8.0, and the impact current resistance is 3.5%; the softening point of the medium-temperature coal tar pitch of the binder is 84°C, and the coking value is ≥ 50%, Ash≤0.35%;

[0039] The particle size range and content of calcined petroleum coke are:

[0040] 0.80mm

[0041] 0.55mm

[0042] 0.35mm

[0043]...

Embodiment 2

[0051] Calcined petroleum coke is used as aggregate, special graphite powder is used as powder, ion slow-release agent is used as additive, and medium-temperature coal tar pitch is used as binder.

[0052] The true density of petroleum coke after calcining the aggregate is ≥2.08 / cm3, the ash content is ≤0.25%; the special graphite powder powder is preferably 40 μm in particle size, resistivity ≤ 8.0 μΩm, flexural strength ≥ 22Mpa, compressive strength ≥ 32Mpa, ash content ≤ 0.25%; the density of the additive ion slow-release agent is 0.98g / cm3, the resistivity is 0.8Ω m, the pH value is 8.5, and the impact current resistance is 4.0%; the softening point of the medium-temperature coal tar pitch in the binder is 86°C, and the coking value is ≥ 50%, Ash≤0.35%;

[0053] The particle size range and content of calcined petroleum coke are:

[0054] 0.80mm

[0055] 0.55mm

[0056] 0.35mm

[0057] 0...

Embodiment 3

[0065] Calcined petroleum coke is used as aggregate, special graphite powder is used as powder, ion slow-release agent is used as additive, and medium-temperature coal tar pitch is used as binder.

[0066] The true density of petroleum coke after calcining the aggregate is ≥2.08 / cm3, the ash content is ≤0.25%; the special graphite powder powder is preferably 40 μm in particle size, resistivity ≤ 8.0 μΩm, flexural strength ≥ 22Mpa, compressive strength ≥ 32Mpa, ash content ≤ 0.25%; the density of the additive ion slow-release agent is 0.98g / cm3, the resistivity is 0.8Ω m, the pH value is 8.5, and the impact current resistance is 4.0%; the softening point of the medium-temperature coal tar pitch in the binder is 86°C, and the coking value is ≥ 50%, Ash≤0.35%;

[0067] The particle size range and content of calcined petroleum coke are:

[0068] 0.80mm

[0069] 0.55mm

[0070] 0.35mm

[0071] 0...

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Abstract

The invention belongs to the technical field of carbon materials and particularly relates to a preparation method of an anti-lighting and resistance-reducing grounding module material. The anti-lighting and resistance-reducing grounding module material comprises calcined petroleum coke, special graphite powder, an ion slow-release agent and medium-temperature asphalt. The preparation method includes: mixing and kneading, forming, calcining and machining, wherein the mixing and kneading includes dry mixing and wet mixing, the special graphite powder, the calcined petroleum coke and the ion slow-release agent are added into a mixing and kneading pot for mixing and kneading during the dry mixing, dry mixing time is 60-70 minutes, dry mixing temperature is 135-145 DEG C, and the material obtained after the dry mixing is a dry material; the medium-temperature coal asphalt is added into the calcined petroleum coke after the dry mixing in twice to perform mixing and kneading during the wet mixing, wet mixing temperature is 145-155 DEG C, the weight of the medium-temperature coal asphalt added in the first time is 75-85% of the total weight of the medium-temperature coal asphalt, the time of the first wet mixing is 20-25 minutes, the weight of the medium-temperature coal asphalt added in the second time is 15-25% of the total weight of the medium-temperature coal asphalt, and the time of the second wet mixing is 25-30 minutes; a paste material is obtained after the mixing and kneading.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and in particular relates to a preparation method of a lightning protection and resistance-reducing grounding module material. Background technique [0002] In the construction and maintenance of electric power projects, in order to avoid lightning strikes and ensure the safety of operators and equipment, grounding devices are usually installed to protect normal operation. Most of the grounding facilities in the past are mainly chemical reagents and metal materials, which are neither environmentally friendly nor safe, but also have disadvantages such as high installation costs, short service life, and serious human damage. [0003] With the continuous development of the electric power industry, many new materials and new processes are applied in the development of electric power, and the grounding module is also gradually developing in the direction of safety, environmental protection, a...

Claims

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Application Information

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IPC IPC(8): C09K17/40H01R4/66H01R4/58
CPCC09K17/40H01R4/58H01R4/66
Inventor 雷涛闵杰
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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