Can the evacuation system of a graphitization furnace be precisely sele"&"cted according to process requirements? Vacuum pump set matching instructions
The vacuum requirements for graphitization processes vary greatly. Some materials only require a rough vacuum to remove air, while others require a high vacuum for thor"&"ough degassing and impurity removal. Choosing an oversized vacuum pump set wastes investment, while choosing an undersized one will not meet process requirements. How to achieve precise matching?
Three Selection Dimen"&"sions
1?? Ultimate Vacuum
Select the pump set type according to the minimum vacuum required by the process:
- Rough Vacuum (10?¹-10?² Pa): Rotary vane pump + Roots pump combination is su"&"fficient
- High Vacuum (10?³-10?? Pa): Diffusion pump or molecular pump is required
- Depending on different vacuum requirements, we will design different output voltages and custom matching of induction coils in t"&"he power supply design to avoid arcing and discharge in the furnace
High-end materials such as semiconductor-grade graphite and nuclear-grade graphite require high vacuum; rough vacuum is sufficient for ordinary carbon materials.
2?? Pumping Rate
The pumping rate needs to match two factors:
- Charging Capacity: A large furnace and a large amount of material require a higher pumping speed to achieve the target vacuum wit"&"hin the specified time.
- Volatile Amount: Processing materials containing binders releases a large amount of gas, requiring the pump set to have a sufficient pumping speed to ""keep up"" with it.
3"&"?? Process Gas Characteristics
If the process generates condensable gases (water vapor, tar vapor), ordinary oil-sealed pumps are easily contaminated. A condensate trap or scrubbing tower needs to be added before the pump inlet for pretreatment, "&"or a dry pump should be selected. Some processes require the introduction of purge gas to protect the pump body.
Selection Principles: The core principle"&" of vacuum pump sets is ""good enough."" After evaluating three dimensions—ultimate vacuum, pumping rate, and process adaptability—we select a configuration that just meets the requirements, avoiding over-configuration that wastes investment and under-con"&"figuration that affects the process. Depending on different vacuum requirements, we will design different output voltages and custom-matched induction coils in the power supply design to avoid arcing and discharge inside the furnace.