Abstract: The CaO-CaF₂, CaO-B₂O₃and Li₂O were respectively used as modifying agent adding to ladle slag to decrease slag adhesion of LATS-OB refining immersion cover and increase service life of cover. Test results of melting point of slag measured by hemisphere method showed that using, CaO:CaF₂=1~2,CaO:B₂O₃=1~2 or Li₂O as modifying agent could remarkably decrease melting point of ladle slag. And metal-slag equilibrium test indicated that the sulphur content in steel further decreased by ladle slag added modifying agent.

摘要： 为减少LATS-OB精炼浸渍罩粘渣及提高浸渍罩寿命,分别用CaO-CaF₂、CaO-B₂O₃及Li₂O作为钢包渣的调质剂进行调质实验。熔渣半球点法的熔点测试结果表明,采用CaO／CaF₂=1或2,CaO／B₂O₃=1或2和Li₂O作调质剂能显著降低钢包渣的熔点;渣-金平衡试验表明,调质后的钢包渣可使钢中的硫含量进一步降低。

关键词: LATS 精炼, 钢包渣 , 调质剂, 熔点, 脱硫能力