Method for preparing microcrystalline glass fiber from blast furnace slag powder and microcrystalline glass fiber

A technology of blast furnace slag powder and glass fiber, which is applied in the field of glass fiber materials, can solve the problems of low quality, poor mechanical properties, and restrictions on the application of high-quality glass-ceramic fiber of blast furnace slag.

Active Publication Date: 2022-06-28
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, at present, the volume content of crystal phases prepared by blast furnace slag is low, resulting in low quality, poor mechanical properties, and poor size uniformity in the preparation of glass-ceramic fibers, which limits the use of blast furnace slag in the preparation of high-quality microcrystals. Application of glass fiber

Method used

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  • Method for preparing microcrystalline glass fiber from blast furnace slag powder and microcrystalline glass fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A method for preparing glass-ceramic fiber by utilizing blast furnace slag powder comprises the following steps:

[0056] (1) put the broken block-shaped construction waste glass with an average particle size of 23mm into the glass melting tank kiln device for melting to obtain glass liquid; wherein, the feeding rate of the waste glass is 86g / s, and the melting temperature is 765 ℃;

[0057] (2) throwing blast furnace slag powder into the molten glass obtained in the step (1), then sequentially melting, clarifying and homogenizing to obtain a glass-ceramic fiber precursor;

[0058] Among them, the mass ratio of waste glass and blast furnace slag powder is 86:128; the feeding rate of blast furnace slag powder is 128g / s, and the input position of blast furnace slag powder is 17cm away from the melting place of waste glass along the flow direction of molten glass; The position is 74cm away from the melting place of the waste glass along the flow direction of the molten gla...

Embodiment 2

[0062] A method for preparing glass-ceramic fiber by utilizing blast furnace slag powder comprises the following steps:

[0063] (1) The broken block-shaped construction waste glass with an average particle size of 21mm is put into the glass melting tank kiln device for melting, and the glass liquid is obtained; wherein, the feeding amount of the waste glass is 93g / s, and the melting temperature is 819 ℃;

[0064] (2) throwing blast furnace slag powder into the molten glass obtained in the step (1), then sequentially melting, clarifying and homogenizing to obtain a glass-ceramic fiber precursor;

[0065] Among them, the mass ratio of waste glass to blast furnace slag powder is 93:141; the feeding rate of blast furnace slag powder is 141g / s, and the input position of blast furnace slag powder is 24cm away from the melting place of waste glass along the flow direction of glass liquid; The position is 82cm away from the melting place of the waste glass along the flow direction of...

Embodiment 3

[0069] A method for preparing glass-ceramic fiber by utilizing blast furnace slag powder comprises the following steps:

[0070] (1) put the powdered construction waste glass with an average particle size of 56 μm into the glass melting tank kiln device for melting to obtain glass liquid; wherein, the feeding amount of the waste glass is 88 g / s, and the melting temperature is 789 ° C;

[0071] (2) throwing blast furnace slag powder into the molten glass obtained in the step (1), then sequentially melting, clarifying and homogenizing to obtain a glass-ceramic fiber precursor;

[0072] Among them, the mass ratio of waste glass and blast furnace slag powder is 88:131; the feeding rate of blast furnace slag powder is 131g / s, and the input position of blast furnace slag powder is 19cm away from the melting place of waste glass along the flow direction of molten glass; The position is 76cm away from the melting place of the waste glass along the flow direction of the molten glass, a...

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Abstract

The invention provides a method for preparing microcrystalline glass fiber from blast furnace slag powder and microcrystalline glass fiber, and belongs to the technical field of glass fiber materials. The method comprises the following steps: melting waste glass to form molten glass; the blast furnace slag powder is fed into the molten glass, so that the blast furnace slag powder can be quickly laid on the liquid surface, the melting of the blast furnace slag powder is promoted, and the feeding mode can provide viscosity reduction time for a mixture formed by the molten glass and the blast furnace slag powder, so that the melting of the blast furnace slag powder in the melting process is further accelerated; then, bubbles and refractory components in the melt are removed through clarification, and the density of the melt is homogenized through homogenization; high-temperature spinning treatment is adopted, so that on one hand, sufficient plasticity of glass ceramic liquid is guaranteed, drawing is facilitated, and on the other hand, fiber breakage or large residual thermal stress caused by rapid cooling in the drawing process is prevented; and finally, heat treatment is performed to eliminate a small amount of internal stress remained in the microcrystalline glass fibers and improve the mechanical properties of the fibers.

Description

technical field [0001] The invention relates to the technical field of glass fiber materials, in particular to a method for preparing microcrystalline glass fibers by using blast furnace slag powder and the microcrystalline glass fibers. Background technique [0002] Glass-ceramic fiber is composed of glass matrix and one or more crystalline phases. Its performance is better than pure glass fiber, and it has the advantages of good insulation, strong heat resistance, good corrosion resistance and high mechanical strength. , commonly used in the fields of reinforcing materials, electrical insulating materials and thermal insulation materials. At present, the commonly used raw materials for the preparation of glass-ceramics are mainly natural silicate minerals and pure compounds. Although this technology is mature, the economical and environmental protection limit the popularization and application of glass-ceramics. [0003] Blast furnace slag is a kind of waste slag discharg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C13/06C03C13/00
CPCC03C13/06C03C13/006
Inventor 艾桃桃董洪峰卫学玲李文虎袁新强
Owner SHAANXI SCI TECH UNIV
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