Lead-based alloy circulation loop system

The invention discloses a lead-based alloy circulation loop system, which comprises a material storage tank for storing a lead-based alloy medium; the circulation loop comprises a heating section, an expansion box and an air cooling heat exchanger which are sequentially connected through a pipeline, and the storage tank is connected to the pipeline between the heating section and the air cooling heat exchanger through a pipeline and a valve; the vacuum pump is connected with the expansion box through a pipeline and a valve; the inert gas source is connected with the storage tank through a pipeline and a valve; wherein the inert gas source is further connected to a pipeline between the heating section and the expansion box through a gas lift system, and the gas lift system comprises a pipeline, a valve, a gas flow meter, a gas pump, a gas pressure meter and a heat tracing system arranged on the pipeline. Compared with the prior art, the lead-based alloy circulation loop system can improve circulation of the le