BaO-CaO-MnO_2-CaF_2的熔点与其组成关系

Relationship between Melting Point of BaO -CaO- MnO_2- CaF_2 Flux and Its Composition

在BaO／CaO重量比值为1／1～5／1的范围内，测定了锰铁合金脱磷剂BaO－CaO－（5％～15％）MnO2－（15％～20％）CaF2的熔点，结果表明：当CaF2含量为15％时，随熔剂中BaO／CaO比值增大，相应熔点降低，随MnO2％增大，熔点升高．当CaF2含量为20％时，在BaO／CaO重量比值为2／1～3／1的组成区域内，熔点突然升高．根据实验结果，推荐60％BaO－12％CaO－8％MnO2－20％CaF2为锰铁合金脱磷剂，该熔剂熔点低（～1250℃），BaO／CaO比值高（5／1）．

The melting point of BaO -CaO- (5% ~ 15%)MnO2- (15% ~ 20%)CaF2 flux was measured in the range of BaO/CaO=1/1 ~ 5/1. The results show that when CaF2 content in flux is 15%, the melting point of this flux is decreased with the increase of ratio of BaO/CaO, it is increased with the increase of MnO2 content, and when CaF3 content is 20%, the melting point of the flux suddenly rises in the composition range of BaO/CaO= 2/1 ~3/1. According to the experimental results, using 60%BaO- 12%CaO - 8%MnO2-20%CaF2 flux as dephosphorialng reagent of the ferro -manganese was recommended.