For the prevention of global warming and the improvement of quality of steel products, Kawasaki Steel has developed a regenerative burner and heating technologies by the use of regenerative heat exchanger system. A regenerative radiant tube burner was developed first. A direct fired regenerative burner heating system was developed and applied to a reheating furnace for a wide flange beam mill, which was the first application for a large scale industrial furnace in the steel industry in Japan, and it has spread to reheating furnaces for hot strip mills, plate mills and seamless pipe mills. A non-oxidizing heating system using high temperature nitrogen jet, a ladle heating system synchronized with the steelmaking converter operation, and a rotary regenerator adopted heating system were also developed. These systems were applied to tundishs of continuous casting machines, to steelmaking converters and to continuous annealing lines respectively. Total energy saving of 733924 GJ is achieved, that is equivalent to 94513t of CO_2 reduction a year and improvement of steel product quality was achieved as well.
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