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Method for preparing boron-containing foam glass

A foam glass and waste glass technology, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of poor high temperature chemical stability, poor thermal shock stability, low mechanical strength, etc., to reduce the foaming temperature , high thermal stability requirements, and the effect of improving mechanical properties

Inactive Publication Date: 2011-06-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the further research and development on the application of foam glass, it is found that when foam glass is used as heat insulation material, its poor thermal shock stability, low mechanical strength, and poor high temperature chemical stability have greatly improved its performance. It reduces its excellent heat insulation effect and application range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, 1) at first get the waste glass that the mass content of boron is greater than 12%, clean up, ball mill after drying and become the glass powder below 200 orders;

[0018] 2) the mass fraction will be 94% glass powder, 1% NaNO 3 , 1% KNO 3 , 1% LiNO 3 , 1% Zn(NO 3 ) 2 , 1% Zr(NO 3 ) 4 .5H 2 The barite of 0 and 1% is put into the ball mill tank and ball milled to obtain batch material below 200 orders;

[0019] 3) Add the batch material into the heat-resistant steel mold, then move the mold with the batch material into the foaming furnace for heating, and fire according to the following firing system;

[0020] In the preheating stage, the heating rate is 15°C / min, and the temperature is raised from room temperature to 400°C and kept for 20 minutes;

[0021] In the foaming stage, the heating rate is 5°C / min, from 400°C to 820°C, and the temperature is kept for 60 minutes;

[0022] In the annealing stage, the cooling rate is 5°C / min, and the temperat...

Embodiment 2

[0024] Embodiment 2, 1) first take the waste glass with a mass content of boron greater than 12%, clean it up, and ball mill it after drying to become glass powder below 200 mesh;

[0025] 2) the mass fraction will be 92% glass powder, 3% NaNO 3 , 1% KNO 3 , 1% LiNO 3 , 1% Zn(NO 3 ) 2 , 1% Zr(NO 3 ) 4 .5H 2 The barite of 0 and 1% is put into the ball mill tank and ball milled to obtain batch material below 200 orders;

[0026] 3) Add the batch material into the heat-resistant steel mold, then move the mold with the batch material into the foaming furnace for heating, and fire according to the following firing system;

[0027] In the preheating stage, the heating rate is 16°C / min, from room temperature to 400°C, and the temperature is kept for 22 minutes;

[0028] In the foaming stage, the heating rate is 4°C / min, from 400°C to 800°C, and the temperature is kept for 40 minutes;

[0029] In the annealing stage, the cooling rate is 6°C / min, and the temperature is lowered...

Embodiment 3

[0031] Embodiment 3, 1) first take the waste glass whose mass content of boron is greater than 12%, clean it up, and ball mill it after drying to become glass powder below 200 mesh;

[0032] 2) the mass fraction will be 90% glass powder, 3% NaNO 3 , 1% KNO 3 , 1% LiNO 3 , 1% Zn(NO 3 ) 2 , 2% Zr(NO 3 ) 4 .5H 2 The barite of 0 and 2% is put into the ball mill tank and ball milled to obtain batch material below 200 orders;

[0033] 3) Add the batch material into the heat-resistant steel mold, then move the mold with the batch material into the foaming furnace for heating, and fire according to the following firing system;

[0034] In the preheating stage, the heating rate is 16°C / min, from room temperature to 400°C, and the temperature is kept for 22 minutes;

[0035] In the foaming stage, the heating rate is 4°C / min, from 400°C to 830°C, and the temperature is kept for 30 minutes;

[0036] In the annealing stage, the cooling rate is 6°C / min, and the temperature is lower...

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Abstract

The invention discloses a method for preparing boron-containing foam glass, which comprises the following steps of: cleaning waste glass in which boron is more than 12 mass percent, performing ball milling to obtain glass powder; performing ball milling on glass powder, NaNO3, KNO3, LiNO3, Zn((NO3)2, Zr(NO3)4.5H2O and barite in an agate jar to obtain a batch; and adding the batch into a heat-resistant steel mold, and preheating, foaming and annealing in a foam heater to obtain the foam glass. Multiple kinds of waste glass with more than 12 percent of boron are taken as raw materials, the NaNO3, KNO3, LiNO3, Zn((NO3)2, Zr(NO3)4.5H2O and the barite are taken as foaming agents, the barite can reduce the volatilization of boron in the batch, the foam temperature of the foam glass is reduced, and the mechanical properties, thermal stability and corrosion resistance of the foam glass are improved. Therefore, the boron-containing foam glass can be applied to the special fields requiring high corrosion resistance, high temperature resistance and high thermal stability.

Description

technical field [0001] The invention relates to a method for manufacturing foam glass, in particular to a method for preparing boron-containing foam glass. technical background [0002] Foam glass is made of waste glass, fly ash, mica, perlite, pumice powder, volcanic ash and other substances rich in glass phase as the main raw materials, adding foaming agent, modifier, accelerator, etc., finely pulverized and uniformly mixed The ingredients are placed in a specific mold and heated at a temperature of 750-900°C to soften, foam and anneal the glass to form a porous glass material filled with numerous uniform bubbles inside. [0003] Foam glass has physical properties such as low density, high strength, and small thermal conductivity. It not only has the inherent permanence, safety, reliability, chemical corrosion resistance, and ant-mouse resistance of glass materials, but also has the advantages of being compatible with other buildings. Compared with materials, it also has ...

Claims

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Application Information

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IPC IPC(8): C03B19/08
Inventor 高档妮刘盼段新勇周小华
Owner SHAANXI UNIV OF SCI & TECH
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