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Method for producing foamed glass using waste glass and method for predicting foaming range of glass using dilatometer

A technology of foam glass and waste glass, which is applied in the field of manufacturing foam glass, can solve problems such as the inability to accurately predict the range of glass foaming, and achieve the effects of process control and production method optimization, foaming temperature optimization, and process simplification

Inactive Publication Date: 2018-01-12
GANGNEUNG WONJU NAT UNIV IND ACAD COOPERATION GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this does not accurately predict the extent of glass foaming, and the unit of measurement may be limited to only millimeter (mm) units

Method used

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  • Method for producing foamed glass using waste glass and method for predicting foaming range of glass using dilatometer
  • Method for producing foamed glass using waste glass and method for predicting foaming range of glass using dilatometer
  • Method for producing foamed glass using waste glass and method for predicting foaming range of glass using dilatometer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 4

[0080] Examples 1 to 4: Manufacturing cellular glass using waste glass

[0081] The waste glass having a sodium silicate component was first ground using a disc mill. Grinding was performed up to three times using the recirculation method. The primary milled powder thus obtained (average particle size 120 μm) is subjected to secondary wet milling (average particle size 2 μm) in distilled water as a solvent at a speed of 100 rpm to 400 rpm for 1 hour to 72 hours .

[0082] The secondary ground powder was dried in an oven at 60°C for 24 hours. The dried powder was sifted through a 200 mesh sieve. The sieved powder thus obtained was placed in a forming mold as an unexpanded precursor, which was molded by pressing to prepare an unexpanded precursor. The unfoamed precursor was heated from room temperature to 700°C using an electric furnace at various heating rates of 1°C / min, 5°C / min, 10°C / min, and 20°C / min, and subjected to calcination and foaming process 2 hours, thereby p...

Embodiment 5 to 8

[0086] Examples 5 to 8: Manufacturing of aesthetically pleasing cellular glass using waste glass

[0087] Examples 5 to 8 relate to colored foam glass obtained by coloring the foam glass of Examples 1 to 4 in a predetermined color. Specifically, waste glass having a sodium silicate component was primarily ground in the same manner as in Examples 1 to 4 using a disk grinder. 1wt% or 2wt% cobalt oxide (Co 3 o 4 ) or manganese oxide (MnO 3 ) was added to the primary ground powder thus obtained (average particle size of 120 μm), and then the mixture thus obtained was wet-milled for the second time in distilled water as a solvent at a speed of 200 rpm for 8 hours (average particle size of 2 μm) .

[0088] The secondary ground powder was dried in an oven at 60°C for 24 hours. The dried powder was sifted through a 200 mesh sieve. The sieved powder thus obtained was placed in a forming mold as an unexpanded precursor, which was molded by pressing to prepare an unexpanded precu...

Embodiment 9 to 12

[0095] Examples 9 to 12: Prediction of the expansion range of glass using a dilatometer

[0096] In order to predict the foaming range of foamed glass using a glass having a sodium silicate component, an unfoamed precursor was prepared by sieving powder and molding the powder using a forming die. The prepared unfoamed precursor was introduced into the dilatometer at various ramp rates of 1°C / min, 5°C / min, 10°C / min and 20°C / min as set forth in Table 3 (Example 9 To 12), the behavior of the cellular glass was observed in real time when a load of 25 cN was applied.

[0097] table 3

[0098]

Example 9

Example 10

Example 11

Example 12

Heating rate (℃ / min)

1

5

10

20

Load change (cN)

25

25

25

25

Cooling rate (℃ / min)

-

-

-

-

Hold time (min)

-

-

-

-

[0099] Figure 6 Shape change curves showing the shrinkage and expansion behavior of the unfoamed precursor at various ramp rat...

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Abstract

According to an aspect of the present invention, there is provided a method for manufacturing foam glass using waste glass, comprising the steps of pressing waste glass powder containing sodium silicate or boroaluminosilicate in a mold without adding a foaming agent. to prepare molded articles, and calcining and foaming the molded articles at a temperature range of 600°C to 1,000°C, wherein the preparation method of waste glass powder includes grinding the waste glass powder containing sodium silicate or boroaluminosilicate by a wet grinding method Acid waste glass.

Description

technical field [0001] The present invention relates to a method for manufacturing foamed glass and a method for predicting the extent of foaming, more particularly to a method wherein waste glass is used as a raw material by grinding and A method of manufacturing foam glass by heat treatment methods and a method of predicting the foaming range of glass using a dilatometer. Background technique [0002] Cellular glass is used in applications that require industrial water resistance, heat resistance, and durability because it exhibits excellent fire resistance, insulation, heat resistance, and sound absorption properties while being light in weight. In particular, cellular glass is used as an excellent heat insulating material and sound absorbing material in structures or buildings. [0003] In the late 1930s the manufacturing principle of cellular glass was proposed. For example, a reducing agent such as carbon and a blowing agent containing oxides, sulfates, or other type...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B19/08B09B3/00C03C11/00
CPCB09B3/00C03B19/08C03C1/002C03C11/007
Inventor 朴商晔郑俊基方喜坤金成振
Owner GANGNEUNG WONJU NAT UNIV IND ACAD COOPERATION GROUP
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