| 摘要 |
<p>In a process for producing molten glass in a generally cylindrical continuously rotating chamber comprising the following steps: (a) feeding inorganic raw materials, including silica in major proportion, into the chamber; (b) providing a flame of high intensity heat produced by the combustion of fuel with a gas containing about 50 to about 100 percent by volume oxygen and directing the flame into the chamber in such a manner that the raw materials are melted; and (c) rotating said chamber at a sufficient speed and cooling the exterior of the chamber with a liquid coolant in such a manner that the inner surface of the chamber is coated with a layer of molten glass, the layer is solidified, and a solidified layer of glass is maintained throughout the process whereby the solidified layer essentially prevents impurities from the inner surface of the chamber from entering the melt; and (d) withdrawing molten glass, the improvement comprising heating the silica prior to step (a) to a temperature in the range of about 500 DEG F. to about 2500 DEG F.</p> |
