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Graphite heat exchangers are primarily used in metallurgical production for cooling high-temperature gas, controlling the temperature of liquid metals, and recovering waste heat, thereby improving energy efficiency and equipment stability. During the steel smelting process, there are large amounts of high-temperature gases and corrosive substances. Thanks to its excellent corrosion resistance, high-temperature tolerance, and good thermal conductivity, graphite heat exchangers are widely used in the following applications: gas cooling – the high-temperature gas generated by blast furnaces needs to be cooled, and graphite heat exchangers can effectively handle the corrosion caused by sulfur- and acid-containing gases. Melting metal temperature control: In the steelmaking and continuous casting process, it is used to regulate the temperature of molten iron or steel in order to ensure the quality of the cast billets. Waste heat recovery: The heat contained in the high-temperature flue gas is recovered to preheat the air used for combustion, thereby improving combustion efficiency and reducing energy consumption. Due to the low tensile strength of graphite material itself, such equipment is typically used in low-pressure conditions (generally not exceeding 0.5 MPa). However, in large metallurgical enterprises like Ansteel, it retains its irreplaceable value due to its stable operation over the long term and lower maintenance costs.