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研究的埋弧精炼渣系能满足重钢 L F埋弧精炼的要求。平均脱硫率为 70 .4 9% ,钢板探伤合格率提高 2 .5 0 % ,- 4 0℃横向冲击值提高近 1倍。精炼渣合适的成分及物性控制范围为 :碱度 3.4～ 4 .2、(Fe O) <1%、(Al2 O3) 16 %～ 2 2 %、(Mg O) 7%～ 10 %、熔点 136 0～ 1380℃、粘度 0 .4 0～ 0 .4 5 Pa· s、表面张力 (490～ 5 2 0 )× 10 - 3N/ m。
The study of the submerged arc refining slag system can meet the heavy steel L F submerged arc refining requirements. The average desulfurization rate of 70.49%, steel flaw detection pass rate increased 2.50%, -400 ℃ lateral impact value increased nearly 1 times. The controllable composition and physical properties of refined slag are as follows: basicity 3.4 ~ 4.2, (FeO) <1%, (Al 2 O 3) 16% ~ 22%, (MgO) 7% ~ 10%, melting point 136 0 ~ 1380 ℃, viscosity 0. 0 ~ 0. 45 Pa · s, surface tension (490 ~ 520) × 10 - 3N / m.