| 摘要 |
PURPOSE:To obtain soot of optical glass useful as a parent material for optical fiber, etc. in high yield in high efficiency, by sending a liquid glass raw material into a spray tube for raw material by pressure, heating it so that it is vaporized, feeding it to a reaction zone for soot formation, sooting it. CONSTITUTION:The liquid glass raw material 2 is sent to the spray tube 5 for raw material by pressure. The oxygen gas 9 and the hydrogen gas 10 are fed to the gas feed pipes 7 and 8 respectively, and they are burned at the tips of the feed pipes 7 and 8, to form oxyhydrogen flame. While the glass raw material 2 is sprayed from the nozzle 4 at the tip of the spray pipe 5 for raw material to the outside, the glass raw material 2 is heated by the oxyhydrogen flame, vaporized, the vaporized glass raw material is fed from the nozzle 4 to a reaction zone for soot formation, and sooted, to prepare the glass soot 12. It is piled on the bottom end of the rotary piling device 11, to form the glass soot bar 13. This glass soot bar 13 is heat-treated to give a parent material fo optical fiber. |
