What gases can be passed through a continuous feeding and discharging rotary tube furnace?

The continuous feeding and discharging rotary tube furnace can be filled with various gases to meet the needs of different materials and processes. These gases mainly include:

Inert gas:
Nitrogen (N ₂): Used to create an inert atmosphere to prevent material surface oxidation, it is one of the most commonly used gases in tubular furnaces.
Argon (Ar): Typically used for inert atmosphere heat treatment of materials, it can maintain uniform temperature and reduce surface oxidation and corrosion of the material.
Other inert gases, such as xenon (Xe), helium (He), etc., can also be introduced according to specific needs.

Reductive gas:
Hydrogen (H ₂): It has strong reducibility and is widely used in the production of tube furnaces. It can destroy oxides at lower temperatures, provide a reducing environment for metal materials, and reduce oxidation reactions on metal surfaces.

Oxidative gas:
Oxygen (O ₂): It can react with fuel inside the furnace, promote the combustion process, and improve the heating efficiency of the tube furnace. Meanwhile, oxygen can also be used for oxidation heat treatment of tubular furnaces, such as oxidation annealing and oxidation hardening.

Other gases:
Air: As an economical and common gas, it can also be used in the heating process of tube furnaces. However, it should be noted that the air contains a large amount of nitrogen and water vapor, and it is necessary to avoid using it in temperature ranges that have special requirements for the material atmosphere.
Mixed gas: Depending on specific requirements, a mixture of multiple gases can also be introduced to achieve a specific atmospheric environment.

When selecting the gas to be introduced, it is necessary to consider the properties of the material, process requirements, and safety factors. For example, for flammable and explosive gases such as hydrogen, strict safety measures need to be taken to prevent gas leaks and explosion accidents. At the same time, it is necessary to control the gas flow rate and pressure reasonably according to the specific design and operating specifications of the tube furnace, to ensure the normal operation and sintering effect of the equipment.