Can a vertical fluidized bed tube furnace be supplied with oxygen?

Vertical fluidized bed tube furnace can be supplied with oxygen, but safety risks and operating standards need to be strictly controlled according to material characteristics and process conditions. The following is a specific analysis:

Oxygen is a highly oxidizing gas, and whether oxygen can be supplied in a vertical fluidized bed tube furnace needs to be comprehensively judged based on material characteristics and process conditions. If the material is a non reducing, non-volatile, and dust-free stable material (such as some metal oxides), oxygen roasting can meet the process requirements of oxidation annealing, oxidation hardening, etc. under the premise of controlling flow rate and temperature. At this time, it is necessary to ensure pressure balance in the furnace to avoid local overheating causing material decomposition or structural damage.

But if the material contains oxidizable components such as carbon and hydrogen, or belongs to flammable and explosive substances (such as metal powder, organic materials), there is a risk of explosion when oxygen is supplied. For example, carbon containing materials may experience turbulent airflow due to volume expansion during high-temperature oxidation, and dusty materials are prone to reaching explosive limits. At this point, it is necessary to verify the feasibility of the process through experiments, such as setting up explosion-proof membranes, controlling the heating rate, configuring gas exhaust channels, and ensuring smooth exhaust at the end to reduce risks.

In practical operation, the following conditions must be met:

Material compatibility: Avoid using materials that react violently with oxygen, or determine safety parameters through preliminary experiments.
Gas purity: The oxygen purity must meet the process requirements to avoid side reactions caused by impurities.
Flow and temperature control: Strictly control the oxygen flow rate and furnace temperature to prevent uncontrolled reactions.
Safety protection: Install gas leak alarm devices, emergency shut-off valves, and ensure that operators stay away from high-temperature areas.