Forged tubes for polycrystalline silicon reactors

Regarding the application of forged tubes in polycrystalline silicon reactors,a general overview based on industrial knowledge and reference articles, but please note that specific technical details and parameters may vary depending on different applications and manufacturers.

1. Material Selection:
   • The selection of materials for forged tubes used in polycrystalline silicon reactors requires the choice of materials with excellent high-temperature resistance and corrosion resistance, as the production environment of polycrystalline silicon often involves high temperatures and possible chemical corrosion.
   • The materials should also have a high purity to avoid introducing impurities during the polycrystalline silicon production process.
2. Technical Requirements:
   • Forged tubes should have high dimensional accuracy and surface quality to ensure installation and sealing performance in the polycrystalline silicon reactor.
   • They need to possess good mechanical properties such as strength and toughness to withstand possible pressure and temperature changes inside the reactor.
3. Manufacturing Process:
   • Forged tubes are manufactured through the forging process, which ensures the internal and external quality of the tubes while improving material density and mechanical properties.
   • During the forging process, parameters such as heating temperature and forging speed need to be controlled to ensure the quality and performance of the tubes.
4. Application Fields:
   • In polycrystalline silicon production, forged tubes are typically used in critical parts of the reactor, such as the feed system and exhaust gas emission system.
   • They need to withstand high temperatures, high pressures, and possible chemical corrosion, requiring materials with excellent high-temperature resistance and corrosion resistance.
5. Special Considerations:
   • Due to the high-temperature environment in polycrystalline silicon production, forged tubes may require special protective measures, such as protective coatings or heat insulation materials, to reduce heat transfer.
   • In the design of forged tubes, the connection method and sealing performance with other components also need to be considered to ensure the stable operation of the entire reactor.
6. Numerical Information (Based on reference articles, but may not be fully applicable to forged tubes):
   • The melting point of polycrystalline silicon is 1410°C, meaning that related equipment and piping in the polycrystalline silicon production process need to be able to withstand such high temperatures.
   • However, specific performance parameters of forged tubes under high temperatures, such as the maximum working temperature and thermal expansion coefficient, need to be determined based on the specific materials and manufacturing processes.