生产镇静钢时采用绝热板,保护渣、防缩孔剂组成的热帽技术,成坯率从1978年的78％,提高到85.5％以上;小钢锭的成坯率达到91％。近几年来,采用外铝型防缩孔剂、轻质绝热板、复合颗粒保护渣后,成坯率又有了较大的提高。锭型的改进也是提高成坯率的重要因素。目前,全国的28吨大扁锭一直到203.2毫米小钢锭都已采用热帽技术,但是,提高成坯率的潜力还不小,必须认真完善热帽 In the production of sedate steel, the hot-hat technology using insulating board, mold flux and shrink-proofing agent was used to increase the billet percentage from 78% in 1978 to over 85.5%; the billet ingot yield reached 91%. In recent years, the use of outside aluminum anti-cratering agent, lightweight insulation panels, composite particle mold flux, the billet rate has been greatly improved. The ingot improvement is also an important factor to improve the billet rate. At present, the country’s 28 tons of large slab until 203.2 mm small ingot have been using hot-hat technology, but to improve the potential into the blank rate is not small, you must conscientiously improve the hot hat