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Manufacturing method of ultra-high voltage insulation cooked mica paper

A manufacturing method and technology of mica paper, applied in the direction of insulators, organic insulators, plastic/resin/wax insulators, etc., can solve the problems of unsatisfactory electrical strength and tensile strength of mica paper, and achieve simple manufacturing process, low production cost, Good electrical strength and tensile strength

Inactive Publication Date: 2011-07-20
HANGZHOU KAIER MICA PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mica paper produced by this method has unsatisfactory electrical strength and tensile strength, and the mica paper produced by the raw powder process is suitable for small electric equipment, but not for large electric equipment

Method used

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  • Manufacturing method of ultra-high voltage insulation cooked mica paper

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Effect test

Embodiment 1

[0023] Using natural muscovite fragments as raw materials, the raw materials are first manually sorted to remove biotite, green mica, etc. that are not suitable for making cooked powder mica paper. After manual sorting, they are further passed through an 8-mesh sieve to initially remove crystal stones and mud. Sand and other impurities to ensure the purity of mica fragments. Put pure mica fragments into an electric furnace, heat to 600°C and calcined for 80 minutes. The calcined mica fragments are called mica clinker. Pass the mica clinker through a 4-mesh sieve, and then sieve the mica clinker at a mass concentration of Immerse in 60% ammonium carbonate solution for 30 minutes, add the impregnated mica clinker: water = 1:6 weight ratio into the reaction kettle, and heat the reaction kettle to 100°C with steam at the bottom of the reaction kettle for 90 minutes , the steam pressure of the feed is 0.3 MPa, and the cooked mica pulp is obtained, and the cooked mica pulp is dilute...

Embodiment 2

[0025] Using natural muscovite fragments as raw materials, the raw materials are first manually sorted to remove biotite and green mica that are not suitable for making cooked powder mica paper. After manual sorting, they are further passed through a 4-mesh sieve to initially remove crystal stones and mud. Sand and other impurities to ensure the purity of mica fragments. Put pure mica fragments into an electric furnace, heat to 800°C and calcined for 50 minutes. The calcined mica fragments are called mica clinker. Pass the mica clinker through a 10-mesh sieve, and then pass the sieved mica clinker at a mass concentration of Immerse in 90% ammonium carbonate solution for 5 minutes, add the impregnated mica clinker: water = 1:14 weight ratio into the reaction kettle, and heat the reaction kettle to 200°C with steam at the bottom of the reaction kettle for 10 minutes , the steam pressure introduced is 0.1 MPa to obtain cooked mica pulp, which is diluted with water to 3 times, and...

Embodiment 3

[0027]Using natural muscovite fragments as raw materials, the raw materials are first manually sorted to remove biotite, green mica, etc. that are not suitable for making cooked powder mica paper. After manual sorting, they are further passed through a 6-mesh sieve to initially remove crystal stones and mud. Sand and other impurities to ensure the purity of mica fragments. Put pure mica fragments into an electric furnace, heat to 700°C and calcined for 60 minutes. The calcined mica fragments are called mica clinker. Pass the mica clinker through an 8-mesh sieve, and then pass the sieved mica clinker at a mass concentration of Immerse in 70% ammonium carbonate solution for 20 minutes, add impregnated mica clinker: water = 1:10 weight ratio into the reaction kettle, and heat the reaction kettle to 120°C with steam at the bottom of the reaction kettle for 60 minutes , the steam pressure of the feed is 0.2 MPa, and the cooked mica pulp is obtained, and the cooked mica pulp is dilu...

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Abstract

The invention discloses a manufacturing method of ultra-high voltage insulation cooked mica paper, and aims to solve the problem that the mica paper prepared by the existing raw powder technique is not applicable to large-size power equipment. The method disclosed by the invention comprises the following steps: screening the mica raw material, calcining at high temperature, screening, dipping, making cooked mica pulp, manufacturing paper with the pulp, drying and the like. The mica paper produced by the method disclosed by the invention has the characteristics of high electric strength and high tensile strength.

Description

technical field [0001] The invention relates to the technical field of mica paper production, in particular to a method for manufacturing UHV insulating cooked powder mica paper. Background technique [0002] Mica is a naturally occurring phyllosilicate mineral, which has excellent physical and electrical properties and maintains the above properties at high temperatures. It is completely chemically inert and non-flammable. The most important thing is It is resistant to high voltage, corona discharge and radiation. Therefore, it is mainly used as a very important insulating material in electronics, motors, telecommunications, electrical appliances, aviation, transportation, instrumentation, metallurgy, building materials, light industry and other industrial sectors, as well as national defense and cutting-edge industries. However, mica flakes are processed from raw mica ore, and the utilization rate of mica is only about 3% to 10%, and a large number of mica fragments and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/12
Inventor 郑立
Owner HANGZHOU KAIER MICA PROD
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