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氧气顶吹转炉30吨钢包喷吹稀土粉的实验取得了初步效果:平均脱氧率ηΣ[O]达47%左右,平均脱硫率ηs达15%左右,脱氧脱硫的一部分产物随着喷吹过程上浮排出,起到了净化钢液的作用,另一部分残留在钢中的夹杂物被有效地改变了形态、大小及分布。这种变性夹杂物的作用,明显地改善和提高了板材的机械性能,减少了钢材的纵横向异性效应,低温横向冲击值提高40～47%。稀土在钢中有效利用率平均达47%左右。从剖部中观察到改善了钢的低倍组织,硫在锭的各部位分布均匀,稀土在锭的各部位分布符合剖锭分布规律。
Oxygen top-blown converter 30 tons of ladle blasting rare earth powder experiments have achieved initial results: the average deoxygenation rate ηΣ [O] up to 47%, the average desulfurization rate ηs up to 15%, part of the deoxygenation desulfurization with the blowing process of floating Discharge, played the role of purification of molten steel, the other part of the residual inclusions in the steel is effectively changed shape, size and distribution. The effect of the denaturing inclusions obviously improves and improves the mechanical properties of the sheet and reduces the longitudinal and transverse anisotropic effects of the steel. The lateral impact value at low temperature is increased by 40 to 47%. The effective utilization of rare earth in steel average about 47%. It is observed from the section that the microstructure of the steel is improved, and the distribution of sulfur in all parts of the ingot is uniform. The distribution of rare earth in each part of the ingot is in accordance with the distribution rules of the ingot.