80 t转炉冶炼SCM435钢留渣操作技术研究

试验研究了转炉冶炼SCM435钢时留渣操作(留渣分数1/3～2/3渣量)对石灰加入量、平衡碱度的留渣炉数和终渣碱度的影响,总结了留渣操作的注意事项。80 t转炉实施留渣操作后,留渣率达到68.9%,成品P含量≤0.015%的比例比从留渣前的49.3%提高到62.2%,同时石灰消耗降低了4.5 kg/t、每炉渣中铁损失减少230 kg。

A Study on Remaining Slag Operation of 80 t BOF Steelmaking Steel SCM435

The effect of remaining slag operation (remaining slag fraction 1/3 ~ 2/3 slag amount) of BOF steelmaking steel SCM435 on lime adding amount, remaining slag heats of equilibrium basicity and end slag basicity is tested and studied, and the points for attention in slag remaining operation are summarized. As the 80t BOF remaining slag operation is put into practice, the remaining slag rate is up to 68. 9% , the ratio of P content ≤ 0. 015% in product increases from original 49. 3% to 62. 2% , and the lime consumption decreases by 4. 5 kg/t, and the iron loss in slag decreases by 230 kg.