The main production process of quartz glass tube

The main production process of quartz glass tube
Quartz glass tube production process is complex, mainly because the quartz glass tube has high purity, high melting temperature and large viscosity, and requires a height of more than 85%. In order to solve the high temperature melting problem, the hydrogen oxygen is used as the heat source, the temperature can reach 2000 degrees C. The high temperature of the heating element depends on the temperature resistance of the material of the heating element. The temperature of the heating element is up to 2100 C with the graphite, tungsten and molybdenum materials as the heating element; and the tungsten and molybdenum are basically not reacted with the SiO2; the arc method is used. It can be 3200 high temperature, so high purity graphite is used as the electric plate to emit electric arc to make quartz glass tube crucible. Because the viscosity of SiO2 is large and the bubble and gas line are not easy to be eliminated, vacuum melting, high temperature pressure to dissolve bubble and gas line, use stratified addition, rely on surface tension to eliminate bubbles and gas lines. The new technology, plasma and laser, can be used for melting high temperature quartz glass tubes. Plasma heating has been put into production. Here are some commonly used quartz glass tube production processes.
1, the single rod electric melting furnace process with crystal as raw material, 30-60mm x 1200-2000mm graphite rod, electric heating, melting temperature depends on the surface power to control, the temperature reaches 1900 C melting crystal melting, at this time SiO2+C - SiC+CO reaction to make quartz glass tube and Shi Mobang separation and produce certain internal pressure, temperature continues, The reaction of silicon and carbon will not be reacted again. The technology can produce quartz glass tube bricks, all kinds of non quartz glass tube utensils (quartz glass tube, quartz glass tube, quartz glass tube crucible, etc.).
2. The vacuum resistance furnace and vacuum pressurization furnace are transformed from vacuum atmospheric pressure furnace to vacuum pressure furnace. The furnace has large, medium and small three kinds, large diameter 4 meters, heating with a row of graphite rods, the melting crystal in the baking furnace can produce large optical quartz glass tubes, and all the infrared optical quartz glass tubes used by military workers are now all It is produced with it; the medium diameter 1m-1.5m is used to produce high pinch infrared optical quartz glass tubes, vacuum pumps and Roots pumps, up to 10-4mm Hg, pressurized bottled, general 20-25kg/cm2, and the raw materials for optical quartz glass tubes are specially processed first grade melting crystal; small vacuum pressurization furnace, 650mm high 80 0mm, the production of quartz tube is vacuum pumping by J-550 or H-8, high temperature vacuum 10-1mm Hg, and graphite crucible as melting device. Foreign countries: France, the United States (50-60 years) used a vacuum furnace to melt quartz Tuo, and then quartz Tuo two times in a resistance furnace, which can be used in the production of large diameter tube (? 80-? 200mm) for the electronic industry.

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The main production process of quartz glass tube

The main production process of quartz glass tube	quartz glass tube	quartz glass tube	quartz tube	quartz
The main production process of quartz glass tube	quartz glass tube	quartz glass tube	quartz tube	quartz
The main production process of quartz glass tube	quartz glass tube	quartz glass tube	quartz tube	quartz