当前我国国民经济结构调整重大任务是自主创新,节能降耗减排,建设资源节约型社会。国家发改环资(2007)1457号文“十一五”重点节能工程实施意见指出:钢铁工业要重点发展高效连铸连轧节能工程。自上世纪80年代末以来,全世界薄板坯或中厚板坯连铸连轧生产线已有55条,其年生产热轧宽带钢的能力达1亿多吨。我国第一条薄板坯连铸连轧生产线于1999年在广州珠钢投产以来, At present, the major task of our country’s national economy structural readjustment is to innovate independently, reduce energy consumption and reduce emissions, and build a resource-saving society. National Development and Reform Fund (2007) No. 1457 “Eleventh Five-Year” key energy-saving project implementation opinions pointed out: the steel industry should focus on the development of energy-efficient continuous casting and rolling project. Since the late 1980s, there have been 55 production lines for continuous casting and rolling of thin slab or medium-thick slab in the world, and their annual production capacity of hot-rolled wide-band steel reaches over 100 million tons. China’s first thin slab casting and rolling production line in Guangzhou Pearl Steel put into operation in 1999,