Method for producing mixed raw material, method for producing molten glass, method for producing glass article, apparatus for producing molten glass, and apparatus for producing glass article
A mixed raw material producing method for producing a mixed raw material includes preparing a glass raw material and an aqueous solution of sodium hydroxide; causing the aqueous solution to absorb carbon dioxide gas, to deposit sodium hydrogen carbonate in the aqueous solution; and mixing the sodium hydrogen carbonate with the glass raw material, to obtain a mixed raw material to be charged into a melting furnace.
1. A method of producing a mixed raw material, comprising:
preparing a glass raw material and an aqueous solution of sodium hydroxide;
exposing the aqueous solution to carbon dioxide gas, such that the carbon dioxide gas is absorbed in the aqueous solution and sodium hydrogen carbonate is deposited in the aqueous solution;
mixing the sodium hydrogen carbonate with the glass raw material such that a mixed raw material comprising the sodium hydrogen carbonate and the glass raw material is obtained; and
heating the mixed raw material before charging the mixed raw material into a melting furnace such that the sodium hydrogen carbonate is converted to sodium carbonate and the carbon dioxide gas is released,
wherein at least a portion of the carbon dioxide gas released in the heating of the mixed raw material is absorbed in the aqueous solution.
2. The method according to claim 1 , wherein the mixed raw material is heated using heat of an exhaust gas from the melting furnace.
3. The method according to claim 1 , wherein the mixed raw material is heated at a temperature in a range of 100° C. to 900° C.
4. The method according to claim 1 , further comprising:
acquiring the carbon dioxide gas from an exhaust gas from the melting furnace.
5. The method according to claim 1 , further comprising:
granulating the mixed raw material before charging the mixed raw material into the melting furnace such that a briquette is formed.
6. The method according to claim 1 , wherein the mixed raw material is heated at a temperature of from 300° C. to 800° C.
7. The method according to claim 1 , wherein the mixed raw material is heated at a temperature of from 500° C. to 800° C.
8. The method according to claim 1 , wherein the aqueous solution forms the sodium carbonate in a first tank and deposits the sodium hydrogen carbonate in a second tank.
9. The method according to claim 1 , wherein the mixed raw material is heated at a temperature of from 300° C. to 800° C., and the aqueous solution forms the melting furnace in a first tank and deposits the melting furnace in a second tank.
10. A method for producing molten glass, comprising:
charging the mixed raw material obtained by the method of claim 1 into the melting furnace; and
melting the mixed raw material in the melting furnace such that molten glass is obtained.
11. A method for producing a glass article, comprising:
forming the molten glass obtained by the method of claim 10 ; and
annealing the formed glass, such that a glass article is obtained.
12. A method for producing molten glass, comprising:
charging the mixed raw material obtained by the method of claim 1 into the melting furnace without cooling the mixed raw material to a normal temperature; and
melting the mixed raw material in the melting furnace such that molten glass is obtained.