板坯连铸机生产三流矩形坯的工艺优化与实践.pdfVIP

1板坯连铸机生产三流矩形坯的工艺优化与实践 1 2 1 1 赵铁成 宋延辉 田凤纪 刘海春 （1.河北钢铁集团唐钢不锈钢公司，唐山 063100 ； 2.河北钢铁集团唐钢第一钢轧厂，唐山 063016 ） 摘 要 针对唐山不锈钢板坯连铸机生产三流矩形坯的工艺过程进行了分析，提出了浸入式水口浸入深度优化、结 晶器铜管合理锥度控制、改善结晶器水质、提高铜管镀层质量、提高设备安装精度、保护渣性能优化、足辊区域喷 嘴改型、弯曲段喷嘴结构优化及二冷制度优化等措施。最终取得了显著的效果：拉速由 1.4m/min 提高到 1.8m/min， 且保持连续半年无漏钢事故；铜管平均过钢量由 2500t 提高到 8200t，单支铜管过钢量最高达到 10720t；杜绝了由 于铸坯鼓肚、脱方、表面凹陷等缺陷造成的质量异议和非计划停浇。 关键词 板坯连铸机 矩形坯 表面凹陷 脱方 二冷制度 Technology Optimization and Practice of Production of Three-strand Rectangular Bloom on Slab CCM Zhao Tiecheng1 Song Yanhui2 Tian Fengji1 Liu Haichun1 (1.Stainless Steel Branch of Tangshan Iron and Steel Co., Ltd., Hebei Iron and Steel Group, Tangshan , 063100; 2.Tangshan No.1 Steelmaking and Rolling Co., Ltd., Hebei Iron and Steel Group, Tangshan, 063016) Abstract The production process of three-strand rectangular bloom on slab CCM of Tangshan Stainless Steel is studied in this paper. Some measures, such as optimization of submerge depth, controlling of conical degree of copper tube, improving of mould cooling water, controlling of the quality of cladding material, improving of equipment precision, optimization of slag, optimization of the configuration of spray nozzle, as well as optimization of secondary cooling scheme are put forward and applied. The results show that the casting speed has been increased from 1.4m/min to 1.8m/min, the life of the copper tube has been improved from 2500 ton to 8200 ton and the maximal copper tube life is 10720 ton, the quality demurral and stop casting due to surface depression ,bulging and off-square have been reduced with effect. Key words CCM，rectangular bloom, surface depression, off-square, secondary cooling scheme 1 引言 唐山不锈钢 2 号板坯连铸机于 2005 年 10 月建成投产。投产后，面对日益严峻的市场形势，为进一步拓 展连铸机产品结构