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Metakaolin cable insulation packing and preparation method thereof

A kind of metakaolin, cable insulation technology, applied in the field of cable filler, to achieve the effect of good mechanical strength and electrical strength

Inactive Publication Date: 2017-03-22
茂名高岭科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on the production technology and industrialization implementation of metakaolin

Method used

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  • Metakaolin cable insulation packing and preparation method thereof
  • Metakaolin cable insulation packing and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) the solid content is that the pH value of 57% kaolin raw ore pulp is adjusted to 6.0 and adds sodium hexametaphosphate and sodium polyacrylate dispersant, the weight of kaolin in the described sodium hexametaphosphate and sodium polyacrylate and the kaolin raw ore pulp The percentage is divided into 5‰ and 2‰, and the slurry is stirred. After stirring the pulp, grind the pulp in an ultra-fine grinder, peel off the flakes, and further press filter and dehydrate to a solid content of 65% to obtain a kaolin filter cake. Wherein, the content of kaolin particles with a particle size of less than two microns in the kaolin raw ore slurry accounts for 95 wt% of the kaolin particles in the kaolin raw ore slurry.

[0029] Among them, after the pulp passes through the 75mm and 25mm cyclones, the overflow pulp of the cyclone is then centrifugally classified by the decanter classifier, and the kaolin particle size can be controlled to less than 2 microns and the content is more t...

Embodiment 2

[0035] 1) the solid content is that the pH value of 57% kaolin raw ore pulp is adjusted to 6.0 and adds sodium hexametaphosphate and sodium polyacrylate dispersant, the weight of kaolin in the described sodium hexametaphosphate and sodium polyacrylate and the kaolin raw ore pulp The percentage is divided into 5‰ and 2‰, and the slurry is stirred. After the pulp is stirred, the pulp is ground and flaked in an ultra-fine grinder, and further press-filtered and dehydrated to a solid content of 65%, to obtain a kaolin filter cake, wherein the kaolin particles in the kaolin raw ore pulp have a particle size of less than two microns The content accounts for 95wt% of the kaolin particles in the kaolin raw ore slurry.

[0036] Among them, after the pulp passes through the 75mm and 25mm cyclones, the overflow pulp of the cyclone is then centrifugally classified by the decanter classifier, and the kaolin particle size can be controlled to less than 2 microns and the content is more than...

Embodiment 3

[0042] 1) The selected kaolin slurry with a solid content of 12% after sand removal is classified by a hydrocyclone and a decanter, so that the content of the kaolin slurry below 2 microns reaches more than 85%; The content is concentrated to 25%; the concentrated pulp is press-filtered to a filter cake with a solid content of 65%.

[0043] Among them, after the pulp passes through the 75mm and 25mm cyclone, the cyclone overflows, and the pulp is then centrifugally classified by the decanter classifier, and the kaolin particle size can be controlled to less than 2 microns and the content is more than 85%.

[0044]2) The kaolin filter cake obtained in the step 1) is flashed and dried under a slight negative pressure condition of -150pa to obtain a kaolin dry powder with a moisture content below 1.5%.

[0045] 3) Calcining the dry kaolin powder obtained in step 2) with biological particles as the combustion medium at a calcination temperature of 750° C. and a calcination time of...

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Abstract

The invention belongs to the technical field of cable packings and particularly relates to a metakaolin cable insulation packing and a preparation method thereof. The metakaolin cable insulation packing is prepared from, by weight, 90-110 parts of PVC resin, 45-55 parts of plasticizer, 5-7 parts of stabilizer and 6-10 parts of metakaolin. The metakaolin is obtained through dry kaolin powder preparation, kaolin heat activation, depolymerization of the heat activated kaolin and the like. According to the metakaolin cable insulation packing and the preparation method of the packing, suitable and optimized process parameters such as kaolin calcining temperature, standing time and the like are found out, metakaolin modification is achieved in the efficient depolymerization and dispersion process, and the metakaolin is prepared, serves as a cable packing and has very good mechanical strength and electrical strength.

Description

technical field [0001] The invention belongs to the technical field of cable fillers, in particular to a metakaolin cable insulation filler and a preparation method thereof. Background technique [0002] my country is a country rich in kaolin resources, especially in Maoming, Guangdong, which is rich in kaolin resources, but the efficient utilization of kaolin resources and the development of new materials still need to be strengthened. [0003] In recent years, the research and application of metakaolin as a new generation of high-activity auxiliary gel material in cement concrete engineering is becoming more and more active abroad; although there are some research works in China, it is very rare in engineering applications. There are few reports on the production technology and industrialization implementation of metakaolin. Contents of the invention [0004] In order to solve the deficiencies of the prior art, the invention provides a kaolin cable insulating filler and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K9/00C08K9/04C08K3/34
CPCC08K9/00C08K3/346C08K9/04
Inventor 邵建聪水中和梅明军王桂明李坤黄赟孙涛
Owner 茂名高岭科技有限公司
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