A molten salt furnace is a boiler that uses a mixture of three melted chemical raw materials as a heat transfer medium. It uses a molten salt circulation pump to force liquid phase circulation, delivers it to the heating equipment, and then returns to the reheated DC special industrial furnace. Energy saving, capable of achieving high operating temperatures of 350 ℃ to 580 ℃ at lower operating pressures. The entire boiler system is mainly composed of a salt circulation system