转炉铁水脱磷预处理水模试验

Water model experimental of dephosphorization pretreatment in converter

利用1/9有机玻璃模型测定了脱磷预处理转炉在不同喷吹条件下的熔池混匀时间、顶吹射流对熔池的穿透深度,渣-钢之间的乳化率。研究了废钢在脱磷预处理转炉熔池中的运动状况,测量了不同单重的废钢在熔池中的悬浮能量。为深入了解转炉脱磷预处理的工艺特点,和转炉正常炼钢的相应数值进行了对比。根据水模测定结果,对A炉、B炉2个脱磷预处理情况进行了比较。从总体情况看,A炉的操作比较合理,预处理后的铁水中磷质量分数可降低到0.010%~0.015%,相当于日本和歌山钢厂的水平。

Mixing time in bath,top blowing jet penetrating depth and emulsification rate between slag and molten steel were measured under different blowing conditions in 1/9 plexiglass model. Scrap movement status in dephosphorization pretreatment bath was studied. Suspension energy of different weight scrap in the bath was measured. To better understand the characteristics of dephosphorization pretreatment process,all the values were compared with normal steelmaking converter correspondingly. A and B two kinds of dephosphorization pretreatment conditions were compared according to the measurement results of water model. From the overall situation,the operation of A convert is more reasonable,phosphorus content after pretreatment in hot metal can be reduced to 0.010%- 0.015%,be equivalent to the level of Japan＇s Wakayama Steel Plant.