100 t 顶吹氧气转炉石灰石造渣炼钢技术的分析和工艺实践

通过石灰石造渣前期成渣机理的分析和转炉热平衡计算得出石灰石消耗为6.0t/炉时,需增加铁水消耗2.1t/炉,减少2.5t/炉废钢消耗,可保证石灰石炼钢终点温度和石灰炼钢终点温度一致。生产试验得出,石灰石造渣炼钢转炉终点碱度(3.3),终点温度(1662℃)、终点C](0.081%)、P](0.016%)、命中率(90%)和普通石灰造渣炼钢工艺一致,但降低转炉炉料成本10.4元/t钢,取得良好的经济和社会效益。

Analysis and Process Practice on Steelmaking Technology of 100 t Top-Blown Oxygen Converter by Limestone for Slag Making

With analysis on the mechanism of early stages slag making by limestone and calculation of heat balance in converter, it is obtained that as controlling limestone consumption 6.0 t/heat, the hot metal consumption must increase by 2.1 t/heat and the scrap consumption shall decrease by 2.5 t/heat, it may insure that the end temperature by limestone steelmaking process is the same by lime steelmaking process. Pilot production results show that with limestone slag making technology the converter steelmaking end basicity (3.3) , end temperature (1662 °C ) , end C] (0.081%), end P] (0.016% ) and end percentage of hits (90% ) showing no difference from that with conventional lime slag making technology. But with limestone slag making technology the cost of converter stock decreases by 10. 4 yuan /t steel to get better economic and social benefit.