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通过热力学分析和已有的实验结果说明了锰铁合金氧化脱磷的可能性。对锰铁合金脱磷宜采用比CaO渣系脱磷能力更强的BaO渣系。以1673K,采用BaO基渣系,对高碳锰铁脱磷为例,讨论了脱磷反应的理论限度和脱磷过程中锰的行为。指出在保锰氧位P_(o_2)=2.206×10~(10)Pa(a_(MnO)=0.5)的条件下,平衡含磷量是令人满意的[％P]_(eq)=0.053。并结合实验提出了高炉锰铁脱磷保锰的热力学条件和工艺条件。
Through thermodynamic analysis and experimental results, the possibility of oxidative dephosphorization of ferromanganese alloy is demonstrated. Ferromanganese alloy dephosphorization should adopt more slag than the CaO slag dephosphorization BaO slag system. Taking 1673K, BaO-based slag system for dephosphorization of high-carbon ferromanganese as an example, the theoretical limit of dephosphorization reaction and the behavior of manganese during dephosphorization were discussed. It is pointed out that the balance of phosphorus content is satisfactory at P 2 O 2 = 2.206 × 10 ~ 10 Pa (a MnO = 0.5). [% P] _ (eq) = 0.053 . Combined with experiments, the thermodynamic conditions and technological conditions for dephosphorization and manganese protection of blast furnace ferromanganese are proposed.