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
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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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