Referring to the production experience of these years in the No.3 steelmaking plant of Anshan Iron& Steel Complex, the relation between the breakout and the mold powders is set forth in the present paper, and some countmeasures are put forward.

• 结合鞍钢第三炼钢厂板坯连铸机多年来的生产实践，阐述了板坯连铸机粘结漏钢与结晶器保护渣的关系，并提出了一些防止漏钢的措施。