CaO-SiO_2-CaF_2 系スラグによる Fe-Cr-C 合金の脱りんの温度依存性

概要

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In viewing the removal of phosphorus from chromium-containing hot metals produced by smelting reduction processes, the temperature dependence of phosphorus distribution ratio between Fe-11.5mass% Cr-C_<satd.> alloy and the CaO-SiO_2-CaF_2 slag saturated with CaO, 3CaO・SiO_2 and CaO・Cr_2O_3 has been investigated from 1517 to 1673 K. In contrary to general trend of dephosphorization, phosphorus distribution ratio was found to increase with increasing temperature, showing good agreement with thermodynamical evaluation with the assumption that the oxygen partial pressure is controlled by chromium is the metal phase and CaO・Cr_2O_3 formed in the slag. This study indicated that high-temperature treatment would be favorable for effective dephosphorization of chromium-containing hot metals.
社団法人日本鉄鋼協会の論文
1995-07-01