Effect of Na2O addition on the partition of vanadium, niobium, manganese and titanium between CaO-CaF2-SiO2 melts and carbon saturated iron.
Effect of Na2O addition on the partition of vanadium, niobium, manganese and titanium between CaO-CaF2-SiO2 melts and carbon saturated iron.
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DOI：
10.2355/isijinternational1966.28.164
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发表时间：
1988
影响因子：
1.8
通讯作者：
F. Tsukihashi;Atsuko Tagaya;N. Sano
中科院分区：
文献类型：
--
作者：
F. Tsukihashi;Atsuko Tagaya;N. Sano
在1300°C下研究了Na 2 O对CaO-CaF_2-SiO_2体系中钒、铌、锰、钛在CaO和3CaO·SiO_2双饱和CaO-CaF_2-SiO_2熔体和碳饱和铁熔体之间分配的影响。钒、铌、钛的分配随Na_2 O含量的增加而增加。另一方面，锰的分配减少，表明氧化锰在CaO-Na_2 O-CaF_2-SiO_2系统中表现为碱性氧化物。在CaO-CaF_2-SiO_2渣系中加入少量Na_2 O，可提高渣系对铌、钒、钛的去除能力。在CaO-CaF 2-SiO2熔剂中加入Na 2 O，可提高锰的收得率和铌、钒、钛的渣中回收率，并计算了钒、铌、锰、钛的容量，讨论了这些容量与碳酸盐容量和磷酸盐容量的关系。
The effect of Na2O additions to the CaO-CaF2-SiO2 system on the partition of vanadium, niobium, manganese and titanium between CaO- CaF2-SiO2 melts doubly saturated with CaO and 3CaO•SiO2 and molten carbon saturated iron was investigated at 1300°C. The partition of vanadium, niobium and titanium increased with increasing content of Na2O. On the other hand the manganese partition decreased, indicating that manganese oxide behaves as a basic oxide in the CaO-Na2O-CaF2-SiO2 system.Since the vanadium, niobium and titanium have various valencies in ionic melts of slag, the ionic species of these three elements were determined. Each element was shown to exist in slag mainly as Nb5+, V4+ and Ti4+, respectively.Addition of a small amount of Na2O to the CaO-CaF2-SiO2 system enhances the capacity of removing niobium, vanadium and titanium from hot metal to slag. It was proved that the yield of manganese increases and the recovery of niobium, vanadium and titanium to slag increases by addition of Na2O to CaO-CaF2-SiO2 flux for hot metal treatment.Vanadium, niobium, manganese and titanium capacities were calculated and the relationships between these capacities and carbonate and phosphate capacities are discussed.