Abstract: The variation of temperature field of the new type of vacuum vessel of snorkel tube during a refining process period was studied by field measurement method and finite element method technology，and compared with the vacuum vessel of separated snorkel tube. The results showed that, the vacuum vessel of integrated snorkel tube FEM results were in good agreement with the measured data. During a refining process period, the temperature of upper portion of the vacuum vessel trended to steady state. The temperature of lower portion of the vacuum vessel increased first and then decreased. The temperature was the highest at the end of the vacuum refining process, and was the lowest at the end of online standby state. The vacuum vessel of integrated snorkel tube could meet the thermal condition at the end of online standby state, and could be used without the online baking between the two refining process. The temperature field of vacuum vessel of integrated snorkel tube was consistent with the separated snorkel tube at the end of the refining process, which proved the feasibility of the new type of the integrated snorkel tube.

Key words: integrated snorkel tube, RH vacuum vessel, temperature field, FEM