초록 ▼

A method and device for nozzle-injection of gas into molten glass is disclosed wherein a gas stream is introduced into the molten glass in a temporally pulsed throughput such that the gas stream is interrupted between two sequential pulses, the duration of each pulse amounting to less than one secon

A method and device for nozzle-injection of gas into molten glass is disclosed wherein a gas stream is introduced into the molten glass in a temporally pulsed throughput such that the gas stream is interrupted between two sequential pulses, the duration of each pulse amounting to less than one second.

대표청구항 ▼

1. Method for nozzle-injection of gas into molten glass, comprising:1.1 introducing a gas stream into a molten mass in a temporally pulsed, throughput; 1.2 interrupting the gas stream between two sequential pulses by creating a pressure-free phase; 1.3 wherein duration of the pulses amounts to less

1. Method for nozzle-injection of gas into molten glass, comprising:1.1 introducing a gas stream into a molten mass in a temporally pulsed, throughput; 1.2 interrupting the gas stream between two sequential pulses by creating a pressure-free phase; 1.3 wherein duration of the pulses amounts to less than 1 s and wherein following the pulse the pressure falls from a maximum value to null within a time span of less than 100 ms. 2. Method according to claim 1, wherein the duration of the pulses amounts to less than 100 ms.3. Method according to claim 1, wherein the duration of the pulses amounts to less than 50 ms.4. Method according to claim 1, wherein following the pulse the pressure falls from a maximum value to null within a time span of less than 50 ms.5. Method according to claim 1, wherein a temporal interval between two sequential pulses amounts to at least 1 s.6. Method according to claim 1, wherein a temporal interval between two sequential pulses amounts to at least 10 s.7. Method according to claim 1, further comprising the step of:8.1 depleting the molten mass of foreign gases through flushing with O2 gas; 8.2 wherein pulsing of the gas stream produces bubbles having a high surface-area/volume ratio through impressed pressure profiles, in order to minimize the bubble volume and to maximize the expelling of foreign gas. 8. Method according to claim 1, wherein following the pulse the fall in pressure causes an underpressure of the gas stream which creates a backsucking effect.