中厚板连铸机二冷水量分布测试与喷嘴型号优化  

Measurement of secondary cooling water distribution and optimization of nozzle type for a medium-thuickness slab caster

作　　者：张春辉 ZHANG Chun-hui(Baosteel group Xinjiang Bayi Iron and Steel Co. Ltd. Steel Plant,Urumqi 830022,Xinjiang,China)

机构地区：[1]宝钢集团新疆八一钢铁股份有限公司炼钢厂

出　　处：《连铸》2019年第3期76-82,共7页Continuous Casting

摘　　要：针对宝钢集团新疆八一钢铁股份有限公司炼钢厂中厚板板坯连铸机二冷喷嘴进行单喷嘴性能测试与组合喷嘴水量分布测试,优化喷嘴选型,并进行连铸板坯表面温度数值模拟研究。喷嘴水量分布结果表明,铸坯边部水量较强;为避免角部过冷,提出了将边部喷嘴更换为小水量喷嘴的优化方案。连铸板坯凝固传热模拟结果表明,喷嘴型号优化后铸坯边部温度分布较为均匀,铸坯横向温度分布的均匀性得到了改善,从而降低了连铸坯裂纹缺陷产生的概率。Single nozzle performance test and combined nozzle water distribution test were carried out on the secondary cooling nozzle of medium and thick slab continuous casting machine in baosteel group xinjiang bayi iron and steel co.,LTD.,the optimal selection of the secondary cooling nozzle was also done,and numerical simulation study on surface temperature of continuous casting slab was carried out. It has found that the cooling was unexpectedly stronger at the edge of the slab. In order to avoid overcooling on the corner zone,a new nozzle with less cooling intensity was proposed as the optimization strategy. The mathematical simulation of solidification and heat transfer illustrated that the temperature distribution at the edge of slab became more uniform and the transverse temperature of slab was more uniform after the optimization. Thus,the occurrence of crack defects was reduced in the slab continuous casting process.

关 键 词：板坯 连铸 二冷喷嘴 布置方案 数值模拟 

分 类 号：TF341.6[冶金工程—冶金机械及自动化]