A kind of high silica glass fiber cotton and preparation method thereof

A technology of high-silica glass fiber and glass fiber cotton, which is applied in the field of inorganic materials, can solve the problem of poor surface finish of glass fiber cotton, achieve the effects of reducing massive dissolution, reducing thermal conductivity, and increasing content

Active Publication Date: 2021-03-12
南玻院(宿迁)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the surface finish of glass fiber wool is not high in the preparation of high-silica glass fiber wool by using basalt wool as raw material in the prior art, thereby providing a kind of surface finish with high surface finish and low thermal conductivity. The preparation method of high silica glass fiber cotton

Method used

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  • A kind of high silica glass fiber cotton and preparation method thereof
  • A kind of high silica glass fiber cotton and preparation method thereof
  • A kind of high silica glass fiber cotton and preparation method thereof

Examples

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Embodiment 1

[0040] This embodiment provides a method for preparing high-silica glass fiber wool, which includes the following steps: acid leaching, water washing, drying and thermal sintering. The specific operation is as follows:

[0041] Acid leaching: put 200 grams of basalt wool with a fiber diameter of less than 5 microns in hydrochloric acid with a concentration of 2mol / L, the mass ratio of hydrochloric acid to basalt wool is 80:1, and heat the system at a heating rate of 4°C / min from The normal temperature was raised from 25°C to 50°C at a constant speed, and then raised to 95°C at a constant speed of 3°C / min, and kept for 2 hours. Keep two-way stirring during the period, the stirring speed is 50 rpm, and then squeeze dry;

[0042] Water washing: the semi-finished product after acid leaching is squeezed dry and put into the cleaning bucket, add tap water, the water temperature is 25 ℃, the mass ratio of water and cotton is 50:1, stir evenly with the mixer, wash with water for 30 m...

Embodiment 2

[0046] This embodiment provides a method for preparing high-silica glass fiber wool, which includes the following steps: acid leaching, water washing, drying and thermal sintering. The specific operation is as follows:

[0047] Acid leaching: put 200 grams of basalt wool with a fiber diameter of less than 9 microns in hydrochloric acid with a concentration of 2mol / L, the mass ratio of hydrochloric acid to basalt wool is 80:1, and heat the system at a rate of 3°C / min from The normal temperature was raised from 25°C to 60°C at a constant speed, and then raised to 95°C at a constant speed of 2°C / min, and kept for 5 hours. Keep two-way stirring during the period, the stirring speed is 60 rpm, and then squeeze dry;

[0048] Water washing: the semi-finished product after acid leaching is squeezed dry and put into the cleaning bucket, add tap water, the water temperature is 25 ℃, the mass ratio of water and cotton is 50:1, stir evenly with the mixer, wash with water for 30 minutes, ...

Embodiment 3

[0052] This embodiment provides a method for preparing high-silica glass fiber wool, which includes the following steps: acid leaching, water washing, drying and thermal sintering. The specific operation is as follows:

[0053] Acid leaching: put 200 grams of basalt wool with a fiber diameter of less than 2 microns in hydrochloric acid with a concentration of 0.1mol / L, the mass ratio of hydrochloric acid to basalt wool is 120:1, and heat the system at a rate of 3°C / min. From room temperature 25°C to 60°C at a constant speed, then to 99°C at a rate of 3°C / min, and keep warm for 0.2 hours. Keep two-way stirring during the period, the stirring speed is 20 rpm, and then squeeze dry;

[0054] Water washing: the semi-finished product after acid leaching is squeezed dry and put into the cleaning bucket, add tap water, the water temperature is 25 ℃, the mass ratio of water and cotton is 50:1, stir evenly with the mixer, wash with water for 30 minutes, after draining, Squeeze out the...

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Abstract

The invention belongs to the field of inorganic material, and discloses a high silica glass fiber cotton with a low thermal conductivity and a preparation method thereof. An acid leach heating processof the preparation method is uniform and slow, which makes acid solution dissolve a non-oxidized silicon component in a fiber body of the fiber cotton at a relatively slow rate. A holding stage is set after the heating finishes, which makes the contact among reactive materials more sufficient to achieve complete dissolution of fibers, thereby decreasing blocky corrosion on fiber surfaces to wellpreserve fiber columnar morphology and being in favor of the fibers producing more porous structure after acid leach to improve the thermal insulation performance of fiber products. Meanwhile, initialreaction temperature in the acid leach process is relatively low and a reaction rate is relatively slow, and the contact surface between the fibers and the acid solution is moderate, which cannot cause reaction products richly collected on the fiber surfaces, is in favor of the migration of impurity ions in the fibers and further improves the silica content in the glass fibers.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and in particular relates to a high-silica glass fiber wool with low thermal conductivity and a preparation method thereof. Background technique [0002] With the advancement of science and technology and the development of aerospace technology, people's demand for high-temperature insulation materials is also increasing and diversifying. Traditional high-temperature insulation materials such as asbestos and rock wool can no longer meet high standards due to their high thermal conductivity. temperature resistance requirements. As a high temperature resistant inorganic fiber special material, high silica glass fiber has the characteristics of high softening point, relatively low thermal conductivity, good wave permeability, light weight, good flexibility and easy forming, so it causes widespread social concern. [0003] High-silica glass fiber cotton is a kind of high-silica glass fiber produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C25/68C03C25/002
CPCC03C25/002C03C25/68
Inventor 郭仁贤祖群王振朋赵骁儒吕兴珍
Owner 南玻院(宿迁)新材料有限公司
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