120 t转炉高碳出钢工艺研究和应用

理论计算高碳出钢冶炼所需的铁水比较常规工艺高2.9％.研究了转炉冶炼前期的脱磷规律.结果 表明:转炉冶炼前期炉渣碱度控制在1.8 ～2.2,炉渣FeO含量控制在15％左右,熔池温度控制在1400～1450℃,转炉冶炼前期平均脱磷率可控制在75％.优化了冶炼过程的供氧制度、加料制度、底吹制度等,转炉终点碳含量可由原来的0...

Technical Study and Application of High Carbon Liquid Tapping of 120t Converter

The amount o£ molten iron for high carbon liquid tapping is 2.9% higher than the conventional process by theoretical calculation. The dephosphorization law at initial smelting period of BOF is studied, The results show that at the first stage with control of ( FeO) 15% ,slag basicity 1.8 to 2. 2 and bath temperature 1400 ~ 1450 t ,then the average dephosphorization rate up to 75% at initial smelting period of BOF. The oxygen blowing system, feeding system and bottom blowing system of smelting process are optimized, that the end-point carbon content can be increased from original 0. 07 % to 0.21% , and the end-point phosphorus content can be reduced from original 0.016% to 0.011%.