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介绍了在1300℃下，以BaCO_3－BaF_2－MnCO_3系熔剂对Si含量不同的锰铁合金进行氧化脱磷的实验情况。结果表明，在该实验条件下，当脱磷剂用量分别为100g／kg合金和130－150g／kg合金时，合金中初始硅含量分别对应限制到［％Si］_i≤0.15％和［％Si］≤0.28％，可得到脱磷率η_p＞40％、锰氧化损失△［％Mn］＜0．5％。通过测定脱磷剂中SiO_2含量对相应渣系的磷酸盐容量C_p的影响关系：lgC_p＝26．996－0169（％SiO_2）估算得到．对应上述硅含量［％Si］的限制值，相应渣系磷酸盐容量的限制范围为lgC_p≥26．32或（％SiO_2）≤4％。
The experiment of oxidative dephosphorization of ferromanganese with different Si contents with BaCO_3-BaF_2-MnCO_3 flux at 1300 ℃ was introduced. The results show that under the experimental conditions, when the amount of dephosphorization agent is 100g / kg alloy and 130-150g / kg alloy, the initial silicon content in the alloy is limited to [% Si] _i≤0.15% and [% Si ] ≤0.28%, dephosphorization rate η_p> 40%, manganese oxidation loss △ [% Mn] <0.5% can be obtained. The effect of SiO 2 content in dephosphorization agent on the phosphate capacity C_p of the corresponding residue system was estimated: lgC_p = 26.996-0169 (% SiO_2). Corresponding to the limit value of the above silicon content [% Si], the limit of the corresponding slag system phosphate capacity is lgC_p≥26.32 or (% SiO_2) ≤4%.