Abstract: The 150t ladle furnace (LF) refining main steels are beam steels for car and wheel steels etc, with production flow sheet 150 t converter-150 t LF-slab casting-continuous rolling. With decreasing the 150t LF average initial slag basicity form 3. 4 to 2. 1 and increasing the Ca wire average feeding rate from 4. 0 m/s to 4. 7 m/s, the initial slag flowability is obviously improved, the Al consumption decreases by 0. 15 kg/1 and the yield of calcium increases by 17% ； with optimizing the power supply scheme the electricity consumption decreases by 2. 5 kWh/s in heating period and the heating-up rate of liquid increases by 0. 93℃ /min.

摘要： 150 t钢包炉(LF)精炼的钢种主要有汽车大梁钢、车轮钢等,其生产流程为150 t转炉-150 t LF-板坯连铸-连轧。通过150 t LF平均初渣碱度由3.4降至2.1,喂Ca线平均速度由4.0 m/s提高至4.7 m/s,改善了初渣流动性,吨钢Al用量降低0.15 kg,钙的收得率提高了17%;通过供电制度的优化,在加热期间降低电耗2.5k Wh/s,钢液升温速度可提高0.93℃/min。

关键词: 150t LF, 精炼, 初渣碱度, 供电制度, 优化