平炉钢用炉外精炼剂的研究

Study on Additive of Secondary Refining Used in Open Hearth Steel

通过实验室及工业实验找到了较为适宜的精炼剂,其成分为75％CaO;10％Al_2O_3;10％CaF_2及5％Al。实验发现,每吨钢加入1kg精炼剂,可脱除0.002％S;温降较小。加入精炼剂的钢夹杂物含量明显降低。

Through experiments in the laboratory and commercial trial an additive suitable for secondary refining is developed, which consists of 75% CaO, 10% AI_2O_3, 10%CAF_2 and 5% Al. It is observed in the test that the additive can desulphurize the hot metal by a rate of 0. 0002% S/1kg with temperature of liquid steel slightly reduced. Inclusions in the steel processed by the additive are drastically lowered.