水口类型对大方坯连铸结晶器内流场和温度场的影响

来源期刊：有色金属科学与工程2012年第1期

论文作者：车晓梅 陈伟庆 赵江 马富平

文章页码：32 - 36

关键词：水口;结晶器;流场;温度场;数值模拟

Key words：nozzle; mould; fluid flow; temperature distrit)ution; numerical simulation

摘    要：利用Fluent流体力学软件对直通式、侧二孔式、侧四孔式浸入水口对大方坯连铸结晶器内钢水流场和温度场进行了数值模拟.结果表明,从流场来看,直通式冲击深度最大,侧二孔式次之,侧四孔式最小,侧四孔式水口在结晶器内钢水能形成上、下两个回流,其下回流涡心较直通式水口从590 mm上移至270 mm,有利于夹杂物的上浮.从温度场来看,侧二孔式和侧四孔式较直通式水口使结晶器内热中心明显上移,且其弯月面钢水温度比直通式分别提高了6K和4K,有利于保护渣的熔化.

Abstract:

The flow field and temperature distribution of molten steel in the blooru casting molcl have been siruulated under the conditions of single straight SEN, side two-furcated SEN, and side quad-furcated SEN by using hydrodynaruic software fluent. Results showed that,seeing from flow field,the impingement depth of single straight SEN was the largest, that of side two-furcated SEN was larger, and the depth of side quad-furcated SEN was sruallest. The upper and lower double rolls were formed in the side quad-furcated SEN ruold. The vorticity of center of the lower roll changed from 590 mm t0 270 mm corupared with that of single straight SEN, in favor of the remove of inclusions. As seen from temperature distribution ,the thermal center moved upward obviously and center temperature of the shell increased 6 K and 4 K respectively with the side two-furcated SEN and the side quad-furcated SEN, which contributed to the melt of mold power.