能源是国民经济发展的命脉,节约能源是当代科学技术发展的重要课题之一。在热连轧带钢生产中,近几年对降低板坯加热用能源的新技术开发取得了迅速的发展。在日本,热轧带钢的燃料平均单位能耗七十年代初期为52.8万大卡/吨,到七十年代未期降为30万大卡/吨左右,降低了40％(见图一)。 Energy is the lifeblood of the development of the national economy. Saving energy is one of the important topics in the development of modern science and technology. In the hot strip production, rapid development has been made in recent years to develop new technologies to reduce the energy used for slab heating. In Japan, the average unit energy consumption of hot-rolled strip fuel was 528 kcal / tonne in the early 1970s and reduced to 300,000 kcal / tonne by the 1970s (see Figure 1) .