本文介绍了在实验室条件下用CaO-CaF_2-Fe_2O_3体系熔剂采用顶部喷吹法炉外处理磷含量为0.4～0.5%的中磷生铁的实验结果.在熔剂消耗量为生铁量的5～5.5%的条件下,脱磷率为80～85%,脱碳率不高于15～20%,终点磷在0.06～0.10%的范围内,脱磷后的铁水可满足下一步转炉少渣炼钢的要求.还采用插入式喷吹法做了对比实验,在其它条件相同时,插入喷吹法的脱磷结果比顶喷法差. In this paper, the experimental results of the phosphorus-containing pig iron with 0.4-0.5% phosphorous content outside the furnace by CaO-CaF_2-Fe_2O_3 flux system were introduced in the laboratory.When the flux consumption is 5 ~ 5.5 %, The dephosphorization rate is 80-85%, the decarburization rate is no higher than 15-20%, and the end point phosphorus is in the range of 0.06-0.10%. The dephosphorized hot metal can meet the requirements of the next converter less slag mill The requirements of the use of plug-injection also made a comparative experiment, the other conditions are the same, insert injection dephosphatation results than the top spray method is poor.