讨论了钢包、中间包及连铸结晶器所用渣相对夹杂物的吸附，对钢水的氧化，以及保护浇注的效果。
Absorption of inclusions to slag, steel reoxidation by slag, and protective effect of the slag at ladle, continuous tundish and nold are discussed.
大型夹杂物主要来源于结晶器卷渣、氧化产物和中间包覆盖剂等。
Large inclusion come from mould fluxes, oxidation products, tundish covering flux and so on.
结果表明：晶界氧化夹杂和铸造、锻造造成的组织缺陷是引起结晶器铜套快速失效的主要原因。
The results show that oxide inclusion in grain boundary and structure defects from casting and forging process are the main reasons for failure of the copper sleeve.
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