CaO-FeO-SiO₂-P₂O₅スラグから溶鉄への復燐速度

抄録

The rate of rephosphorization was investigated by measuring the change of phosphorus content of the metal under CaO-FeO-SiO₂-P₂O₅ slag in a magnesia crucible. Experiments were carried out with slags of basicity from 0.57 to 1.76 in the temperatures range from 1570 to 1650°C.
The results are as follows:
1) The rate of reaction decreased with increase of basicity of slag and with decrease of temperature corresponding to the change of the partition ratio of phosphorus.
2) The reaction rate was increased by the addition of silicon or aluminum into iron.
3) The rate of rephosphorization into liquid iron without any deoxidizer was interpreted by the rate equation derived from the assumption that the reaction was controlled by the diffusion of phosphorus in the boundary layer of liquid iron.