Abstract: Based on research of refining slag series by 55~75kg experimental ladle furnace (LF),the commercial production experiment of embedding are refining slag in a 60t ladle furnace has been carried out using three kind of slag:S1  slag-63.6~70.0 lime,22.7～25.0 high alumina and 5.0~13.6 fluorite; S2 slag-60.0~66.7 lime, 20.8～25.0 fluorite and 12.5～15.0 refractory block; and S3 slag-55.5～65.0 lime and 35.0～44.5 fluorite, and the refining steel grades were 20,20G,40Cr,35CrMoA and CCr15  steel. The results showed that all average desulphurization rate of molten steel using the three-slag series was 87%, and the average heat up rate of molten steel during LF refining was 3.84 ℃/min, 2.86 ℃/min and 2.48 ℃/min respectively by using S1, S2 and S3 slag series. As desulphurization speed was quick by using S1 slag therefore the refining time decreased.

摘要： 在 5 5～ 75kg实验钢包炉精炼渣系的研究基础上 ,采用组成 (% )为 :63.6～ 70.0石灰 ,22.7～ 25.0高铝矾土 ,5.0～13.6萤石 (S1渣) ;60.0～ 66.7石灰 ,20.8～ 25.0萤石 ,12.5～ 15.0火砖块(S2渣 ) ;55.5～ 65.0石灰 ,35.0～ 44.5萤石 (S3渣)3种渣系进行 60tLF精炼渣埋弧工业试验 ,所精炼的钢种为 20 ,20G ,40Cr ,35CrMoA和GCr15。结果表明 ,用3种渣系钢水平均脱硫率均为 87%, LF在采用S1、S2、S3渣系精炼时钢水平均升温速度分别为 3.84℃ min、2.86℃ min和 2.48℃ min。S1渣的脱硫速度快 ,从而缩短了精炼时间。

关键词: 钢包炉, 精炼渣, 脱硫, 升温速度