武钢条材总厂一炼钢分厂2号连铸机改造实践

Reform of the No.2 continuous billet caster at No.1 Steel Making Branch of General Wire Rod Mill of WISCO

某厂现有2号连铸机只能生产最小断面为200 mm×200 mm的方坯,不能满足生产断面为160mm×160 mm方坯的要求,决定对连铸机进行改造。从铸机拉速和浇注周期、结晶器设备配置、二次冷却工艺等方面对160 mm×160 mm断面方坯生产的可行性进行了研究,完成了2号连铸机结晶器、扇形段、拉矫机、引锭头及过渡段的改造。一次热负荷试车投产,成功地生产了3炉60Si2Mn弹簧钢,其产品质量完全满足要求。

The section reform from 200 mm 200 mm to 160 mm 160 mm of No. 2 continuous billet caster of the steelmaking plant was described. Production feasibility was studied at the billet caster of 160 mm 160mm section,such as withdraw rate,casting time,mould and secondary cooling etc. The reform of mould,sector,withdraw stands,dummy bar head and transition was completed. The first heating charge successful produced three heats of spring steel grade of 60Si2 Mn,the billet quality satisfied customer requirements.