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Method for manufacturing calcined high-temperature and high-pressure resistant mica paper tape

A manufacturing method and high temperature resistant technology, applied in insulators, electrical components, insulators, etc., can solve the problems of easy breakdown and low dielectric strength of mica paper tapes, and achieve improved dielectric strength, expanded applications, and tensile strength. and the effect of improving heat resistance

Inactive Publication Date: 2012-08-29
SICHUAN MEIFENG MICA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing mica paper tape has low dielectric strength and is easily broken down

Method used

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  • Method for manufacturing calcined high-temperature and high-pressure resistant mica paper tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 adopts the inventive method to prepare muscovite single-sided paper tape

[0040] Select high-quality muscovite as raw material, with an area of ​​5cm 2 Around, thickness 1~2mm, and quantitative 15kg / bag. Preheat the calcination furnace (industrial resistance furnace produced by Shanghai Electric Furnace Factory, model: RG2-24-9) to 850°C, open the furnace cover, pour in a pack of 15kg raw materials and close the furnace cover, and calcine in the state of furnace rotation Pour out after 40 minutes. After cooling to normal temperature, the calcined raw materials are screened through a drum sieve to remove the powder.

[0041] After calcination, the raw materials are evenly put into the special hydraulic pulper through the feeder for pulping flotation, and the pressure generated by the high-pressure water pump is 55kg / cm 2 The mica is peeled into fine scales by high-pressure water jet, and dehydrated by 60% through a 120-mesh filter, and then passed throug...

Embodiment 2

[0043] Embodiment 2 adopts the inventive method to prepare muscovite single-sided paper tape

[0044] Select high-quality muscovite as raw material, with an area of ​​5cm 2 Around, thickness 1~2mm, and quantitative 15kg / bag. Preheat the calcination furnace (industrial resistance furnace produced by Shanghai Electric Furnace Factory, model: RG2-24-9) to 875°C, open the furnace cover, pour in a pack of 15kg raw materials and close the furnace cover, and calcine while the furnace body is rotating Pour out after 50 minutes. After cooling to normal temperature, the calcined raw materials are screened through a drum sieve to remove the powder.

[0045]After calcination, the raw materials are uniformly put into the special hydraulic pulper through the feeder for slurry flotation, and the pressure generated by the high-pressure water pump is 58kg / cm 2 High-pressure water jets peel mica into fine scales, and dehydrate 65% through a 120-mesh filter, and then pass through a cyclone cl...

Embodiment 3

[0047] Embodiment 3 adopts the inventive method to prepare muscovite single-sided paper tape

[0048] Select high-quality muscovite as raw material, with an area of ​​5cm 2 Around, thickness 1~2mm, and quantitative 15kg / bag. Preheat the calcination furnace (industrial resistance furnace produced by Shanghai Electric Furnace Factory, model: RG2-24-9) to 900°C, open the furnace cover, pour in a pack of 15kg raw materials and close the furnace cover, and calcine while the furnace body is rotating Pour out after 60 minutes. After cooling to normal temperature, the calcined raw materials are screened through a drum sieve to remove the powder.

[0049] After calcination, the raw materials are evenly put into the special hydraulic pulping machine through the feeder for pulping flotation, and the pressure generated by the high-pressure water pump is 60kg / cm 2 High-pressure water jets peel the mica into fine scales, and dehydrate 70% through a 120-mesh filter, and then pass through ...

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Abstract

The invention belongs to the field of insulating materials, particularly relating to a method for manufacturing a calcined high-temperature and high-pressure resistant mica paper tape, and aiming to solve the technical problem that the traditional mica paper tape is easily broken down due to the low dielectric strength. The method for manufacturing the calcined high-temperature and high-pressure resistant mica paper tape comprises the following steps of: a. selecting a mica raw material; b. calcining; c. preparing pulp; d. papermaking; and e. compounding. The mica paper tape manufactured by the method provided by the invention has high dielectric strength, and is suitable for both a B-grade cable and an A-grade cable.

Description

technical field [0001] The invention belongs to the field of insulating materials, and in particular relates to a method for manufacturing a calcined high-temperature and high-pressure resistant mica paper tape. Background technique [0002] Mica tape, also known as fire-resistant mica tape, is a fire-resistant insulating material that can be used to make fire-resistant wires and cables. According to GB12666.6-90 "Test Method for Fire Resistance of Electric Wire and Cable", the heat resistance grades are divided into two grades, A and B, and the corresponding heat resistance temperatures in the test are 950-1000°C and 750-800°C respectively. The dielectric strength of commonly used refractory mica tape is 12~13KV / mm, which is generally suitable for the manufacture of Class B cables. [0003] Common muscovite paper, phlogopite paper, and synthetic mica paper used in existing mica tapes are made of muscovite, phlogopite, and synthetic mica through beating, filtering, and prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B19/00H01B17/60
Inventor 彭光成魏荣刚靳勇邓雅玲廖建
Owner SICHUAN MEIFENG MICA IND
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