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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 tracer technology was used to study the source of large-scale inclusions on the surface of slab rolled by continuous casting slabs. The results are as follows: 1) The large inclusions on the surface of slab rolled by slab mainly come from foreign large- Secondary oxidation products) and small liquid steel inclusions in the complex. 2) The major and minor order of the source of foreign large-grain inclusions is the erosion of middle tank slag, mold slag and middle tank stopper. Intermediate cans include ladle slag and ladle linings. 3) Small particles inclusions in molten steel come from the deoxidation products of molten steel, the secondary oxidation products of molten steel, the products of SiO 2 in molten steel and refractories and slag, and the small slag droplets dispersed in molten steel. 4) Large slab inclusions on the surface of slab rolled by continuous casting slabs rarely come from the erosion of the middle tank liner.