提高方圆坯铸机连浇炉数的工艺及装备技术  

Technology of Process and Equipment for Continuous Casting Heats Improvement With Square/Round Caster

作　　者：陈天明[1] 陈永[1] 陈亮[1] 黎建全 杨文中 潘红[1] 

机构地区：[1]攀钢集团研究院有限公司,钒钛资源综合利用国家重点实验室,四川攀枝花617000 [2]攀钢集团攀枝花钢钒有限公司,四川攀枝花617062

出　　处：《钢铁》2014年第2期34-39,共6页Iron and Steel

摘　　要：攀钢钒提钒炼钢厂2009年10月中旬投产的方圆坯连铸机单中间包连浇炉数较低，影响了炼钢生产组织。分析了浇注铝镇静钢水口堵塞原因，通过研究脱氧工艺、夹杂物变性处理工艺及优化二冷喷嘴结构与布置方式、改进拉矫设备及工艺，改善了钢水可浇性，提高了铸机拉速，铝镇静钢因水口堵塞造成的流次断浇率由投产初期的12．9％降至2．0％以下，单中间包连浇炉数由投产初期的4～5炉提高到7～10炉，硅镇静钢单中间包连浇炉数由6～9炉提高到8～14炉，从而保证了方圆坯铸机生产顺行，降低了生产成本。The square/round billet caster of Pangang Group Panzhihua steel and vanadium Co. , Ltd. had been opera- tion in mid-October 2009. The steelmaking production organization was affected by less continuous casting heats of one tundish at initial time of the operation. Reasons of nozzle clogging for aluminium killed steel in continuous cast ing process were analyzed, in order to solve these problems, some countermeasures such as deoxygenation process optimization, inclusions modification, nozzles optimization in secondary cooling zone, and straightening and with- drawal process improvement were carried out. Industrial tests show that the castability and casting speed is im proved obviously, and rate of break off caused by nozzle clogging for aluminium killed steel continuous casting is re- duced from 12.9% to 2.0%. Moreover, 7 -10 heats molten steel can be continuously cast in a single tundish, which is better than 4-5 heats before optimization for aluminum killed steel; and for silicon killed steel, 8-14 heats can be continuously cast in a single tundish, which is better than 6 9 heats before optimization. With this study, smooth continuous casting process can be ensured, and meanwhile, it can meet the requirement of cost reduction.

关 键 词：方圆坯连铸机 中间包连浇炉数 夹杂物控制 二冷喷嘴布置 辅助拉矫机 

分 类 号：TF341.6[冶金工程—冶金机械及自动化]