连铸板坯所轧中板表面大片夹杂物来源  

Research about sources of large piece inclusion on plate rolled from CC slab

作　　者：陈宏豫[1] 马智明[1] 

机构地区：[1]安阳钢铁有限公司

出　　处：《连铸》1997年第3期28-31,38,共5页Continuous Casting

摘　　要：本文报告了用示踪剂技术研究连铸板坯所轧中板表面大片夹杂物来源的情况,结果如下: 1)连铸坯所轧中板表面大片夹杂物主要来自外来大颗粒夹杂物(包括二次氧化产物)与钢液中小颗粒夹杂物的复合物。 2)外来大颗粒夹杂物来源的主次顺序为中间罐渣、结晶器渣、中间罐塞头的侵蚀物。中间罐渣包括钢包渣和钢包衬的侵蚀物。 3)钢液中的小颗粒夹杂物来自钢液的脱氧产物、钢液空气的二次氧化产物、钢液与耐火材料和渣中SiO_2作用产物和弥散在钢液中的小渣滴。 4)连铸板坯所轧中板表面大片夹杂物很少来自中间罐衬的侵蚀物。In this paper, the sources of large piece inclusions on the plate rolled from continuous casting slabs are investigated with the tracer technique. The results are as follows: 1) These large piece inclusions come mainly from the compounds which are the mixture of external large grained inclusions (including reoxidation products) and small grained inclusions in liquid. 2) The sequence of sources of the external large grained inclusions is tundish slag, mold slag and corrosions products of tundish stopper head. The tundish slag includes ladle slag and corrsion products of ladle line. 3) The samll inclusions suspending in liquid come from the deoxidation and reoxidation products of liquid, the acting products of liquid with refractory and SiO2 in slag, and the small slag drops floating off in liquid. 4) This experiment has shown that the large piece inclusions on plate coming from the corrosion products of tundish line is little.

关 键 词：夹杂物 示踪剂 连铸板坯 结晶器 中间罐 大颗粒 钢包渣 钢液 侵蚀物 氧化产物 

分 类 号：TF777[冶金工程—钢铁冶金]