Abstract: Mathematic model for catch carbon practice of steelmaking medium and high carbon steel in a 70 t arc furnace has been established. According to the requirement of carbon content in liquid steel at tapping, based on the chemical compositions of charged scrap and hot metal, the blowing parameters of ultrasonic coherent jet oxygen lance are controlled suitably to use consumable oxygen-carbon lance at door and the available slag basicity is used to carry out aim catch carbon practice. The steelmaking practice of 0. 55% C steel showed that with charged 30% hot metal, the proportion of heats with arc furnace end point [C] 0. 40% ~ 0. 65% was N85% to obviously decrease steel melting cost.

摘要： 建立了70 t电弧炉冶炼中高碳钢的留碳操作的数学模型。按照出钢时钢水碳含量的要求,基于入炉废钢和铁水成分,控制超音速集束氧枪的吹炼参数,合理使用炉门自耗式碳氧枪和采用相应的炉渣碱度,以实现目标留碳操作。0.55%C钢的冶炼实践表明,当热装铁水30%时,电弧炉终点[C]为0.40%～0.65%的炉次≥85%,显著降低了冶炼成本。

关键词: 电弧炉, 热装铁水, 超音速集束氧枪, 留碳操作