复合喷吹石灰与镁粉配比对铁水脱硫效果的影响

简述了石灰与镁粉复合喷吹铁水脱硫的原理和特点,生产试验了石灰:镁粉为2.0～3.5:1,3.5～5.0:1和5.0～6.5:1对铁水终点硫,钢水回硫率,铁水损失,喷吹过程铁水降温,脱硫时间和120t转炉冶炼效果的影响,得出采用石灰:镁粉配比3.5～5.0:1时,可实现回硫小于0.003 5%,铁损小于26 kg/t,温降低于18℃,钢水收得率87%以上,成本显著降低。

Effect of Ratio of Lime to Magnesium Powder in Combined Blowing Process on Desulfurization results of Hot Metal

Principle and feature of combined blowing process of lime to magnesium for desulfurization of hot metal are briefly introduced, and the effect of ratio of lime to magnesium powder 2. 0 ~ 3. 5 ： 1, 3.5 ~ 5. 0 ： 1 and 5.0 ~ 6.5：1 on end sulfur in metal, resulphurization rate, iron loss and temperature drop in blowing process, desulphurization time and 120 t BOF steelmaking results are commercial-tested. It is obtained that with using the ratio of lime to magnesium powder 3. 5 ~5. 0 ： 1, the resulphurization amount is less than 0.003 5% , the iron loss is less than 26 kg/t, temperature drop is less than 18 ℃ and the yield of steel liquid is more than 87% , so the production cost decreases markedly.