Process for producing granules, method for producing molten glass and method for producing glass product
First Claim
1. A process for producing granules, which comprises:
- contacting a contacting liquid and an exhaust gas formed in a process for producing borosilicate glass by melting a glass raw material, to obtain a treated liquid having a boron component in the exhaust gas dissolved in the contacting liquid,adding magnesium hydroxide to the treated liquid to obtain a liquid comprising the boron component and the magnesium component,measuring a composition of the liquid comprising the boron component and the magnesium component and adjusting the composition of the liquid comprising the boron component and the magnesium component to prepare a granulation liquid, andgranulating a glass raw material powder for producing alkali-free borosilicate glass in the presence of the granulation liquid.
2 Assignments
0 Petitions
Accused Products
Abstract
To provide a process for producing granules, wherein a component in an exhaust gas discharged from a glass melting furnace can be reused as a raw material for alkali-free glass, and a heating and drying step is not required for the reuse. Exhaust gas G1 formed in a process for melting a raw material of glass containing a boron component is brought in contact with contacting liquids L1 and L2 to obtain treated liquids S1, S2 and S3 having the boron component in the exhaust gas G1 dissolved therein; magnesium hydroxide is added to the mixture of the treated liquids in a treated liquid tank 14 to obtain a liquid containing a boron component and a magnesium component; by using the liquid, a granulation liquid is prepared; and in the presence of the granulation liquid, a raw material mixture for producing alkali-free borosilicate glass is granulated to produce granules.
3 Citations
15 Claims
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1. A process for producing granules, which comprises:
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contacting a contacting liquid and an exhaust gas formed in a process for producing borosilicate glass by melting a glass raw material, to obtain a treated liquid having a boron component in the exhaust gas dissolved in the contacting liquid, adding magnesium hydroxide to the treated liquid to obtain a liquid comprising the boron component and the magnesium component, measuring a composition of the liquid comprising the boron component and the magnesium component and adjusting the composition of the liquid comprising the boron component and the magnesium component to prepare a granulation liquid, and granulating a glass raw material powder for producing alkali-free borosilicate glass in the presence of the granulation liquid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for producing molten glass, which comprises:
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contacting a contacting liquid and an exhaust gas formed in a process for producing borosilicate glass by melting a glass raw material, to obtain a treated liquid having a boron component in the exhaust gas dissolved in the contacting liquid, adding magnesium hydroxide to the treated liquid to obtain a liquid comprising the boron component and the magnesium component, measuring a composition of the liquid comprising the boron component and the magnesium component and adjusting the composition of the liquid comprising the boron component and the magnesium component to prepare a granulation liquid, granulating a glass raw material powder for producing alkali-free borosilicate glass in the presence of the granulation liquid to produce granules, and melting the granules to obtain molten glass. - View Dependent Claims (11, 12, 13)
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14. A method for producing a glass product, which comprises:
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contacting a contacting liquid and an exhaust gas formed in a process for producing borosilicate glass by melting a glass raw material, to obtain a treated liquid having a boron component in the exhaust gas dissolved in the contacting liquid, adding magnesium hydroxide to the treated liquid to obtain a liquid comprising the boron component and the magnesium component, measuring a composition of the liquid comprising the boron component and the magnesium component and adjusting the composition of the liquid comprising the boron component and the magnesium component to prepare a granulation liquid, granulating a glass raw material powder for producing alkali-free borosilicate glass in the presence of the granulation liquid to produce granules, melting the granules to obtain molten glass, and annealing the molten glass. - View Dependent Claims (15)
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Specification