莱钢活炉底复吹转炉炉型控制工艺实践

THE PROCESS PRACTICE OF PROFILE CONTROL OF COMBINED BLOWING CONVERTER WITH MOVABLE FURNACE BOTTOM IN LAIWU STEEL PLANT

针对活炉底复吹转炉在生产中易出现的炉底高度波动，钢渣两侧大面凹陷，熔池部位形状不规则和炉口粘渣内径波动等现象，莱钢特钢厂采取了动态控制炉底高度，合理维护两侧大面，量化控制炉口粘渣内径等措施，近两年来炉底高度稳定在6．60～6．80m，钢渣两侧大面无凹坑，熔池、渣线部位无明显凹槽，炉口粘渣内径稳定在190～2．35m，转炉炉型保持稳定受控状态，为转炉操作提供了有利条件。

During the production, the height fluctuations of furnace bottom may arise easily on the combined blowing converter with movable furnace bottom, the depression occurs on both sides of slag in large area, the shape of welding pool turns irregular, the inner diameter wlth adherent slag of converter mouth gets movable, so Special Steel Works adopts such measures as： dynamic control the height of furnace bottom, proper maintenance of both sides of the slag, quantization control of the inner diameter with adherent slag at converter mouth. In the past two years, the height of furnace stays at 6.60 - 6.80m, no pits are on both sides of slag, no clear grooves on the part of welding pool and slag line, the inner diameter with adherent slag are at 1.90 - 2.35m, the converter furnace keeps stable under control, which offers advantages for converter operating.