Abstract:By adopting the molten salt storage heat transfer scheme and combining the multi-function collaborative control technology such as time-of-use electricity price and power trading, the study on the recovery of waste heat from high temperature flue gas of copper smelting by the molten salt storage heat transfer system was carried out. The heat flow and material flow in the heat transfer process were analyzed, and the amount of molten salt storage in 10 h and the size of molten salt storage tank were estimated. The fixed investment of this scale of molten salt storage heat transfer system was about 9.25 million Yuan. By replacing waste heat boiler with molten salt storage heat transfer system, the capital recovery life is about 5.7 years. The power efficiency of molten salt storage heat transfer system is better than that of waste heat boiler when the electricity price is peak-ping-valley, and it can adapt to the gas fluctuation and reduce the impact load of power consumption process on the power grid. The effects of flue gas temperature, flow rate and SO2 content on molten salt flow rate, steam production and power generation were discussed. With the increase of flue gas temperature, flow rate and SO2 content, molten salt flow rate, steam production and power generation showed a positive correlation.