Phosphorus partition between liquid iron and CaO-SiO 2 -MgO-FeO x slags have been investigated experimentally. Fe doped with Fe 3 P was equilibrated, at 1873 K, in a closed system, with a fully liquid, MgO saturated slag in a dense-sintered MgO crucible. Synthetic slags with low CaO/SiO 2 ratio (1 to 1.32) and varying FeO x concentrations (10 to 30 wt pct) constituted the slag phase. P 2 O 5 concentrations in the slag varied between 0.3 and 1.5 wt pct for added phosphorus concentrations of 0.06 to 0.316 wt pct. Phosphorus partition has been found to increase with increasing CaO/SiO 2 ratios. Phosphorus partition increased with increasing oxygen potential over the investigated oxygen partial pressure range, $$ {\text{p}}_{{{\text{O}}_{ 2} }} = 1.4 \times 10^{ - 5} \;{\text{to}}\;4.8 \times 10^{ - 5} ({\text{Pa}}) $$ p O 2 = 1.4 × 10 - 5 to 4.8 × 10 - 5 ( Pa ) . The present experimental result has been compared with literature data. The effect of slag basicity on the dephosphorization power of slags has been discussed based on this comparison. The minimum amount of slag to achieve sufficient dephosphorization using DRI has also been calculated and discussed.

中文翻译：

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基于直接还原铁的液铁与液渣间磷分配的实验研究

已经通过实验研究了铁水和 CaO-SiO 2 -MgO-FeO x 渣之间的磷分配。掺有 Fe 3 P 的 Fe 在 1873 K 时在密闭系统中与致密烧结的 MgO 坩埚中的完全液态的 MgO 饱和炉渣平衡。具有低 CaO/SiO 2 比（1 至 1.32）和不同 FeO x 浓度（10 至 30 wt pct）的合成炉渣构成炉渣相。对于添加的磷浓度为 0.06 至 0.316 重量百分比，炉渣中的 P 2 O 5 浓度在 0.3 至 1.5 重量百分比之间变化。已经发现磷分配随着CaO/SiO 2 比率的增加而增加。在研究的氧分压范围内，随着氧势的增加，磷分配增加，$$ {\text{p}}_{{{\text{O}}_{ 2} }} = 1.4 \times 10^{ - 5} \;{\text{to}}\;4.8 \times 10^{ - 5} ({\text{Pa}}) $$ p O 2 = 1.4 × 10 - 5 到 4。8 × 10-5 (Pa)。目前的实验结果已与文献数据进行了比较。在此比较的基础上讨论了炉渣碱度对炉渣脱磷能力的影响。还计算和讨论了使用 DRI 实现充分脱磷的最低炉渣量。