噴流式撹拌による取鍋精錬法のモデル解析

抄録

Pulsating Mixing (PM) process has been devised for refining molten steel in ladle. The objectives of the new process are summarized as follows:
(1) Retaining the same ability in deoxidation and alloy trimming as those of RH treatment.
(2) Minimizing the contamination of steel, such as rephosphorization and reoxidation, arizing from top slag during the treatment.
(3) Significantly decreasing operation cost and investment in comparison with those for RH- or DH-process.
Water model experiments have been carried out with a 1/3 scale model apparatus for investigating the feasibility of the process, showing that the process satisfies the above requirements. A mathematical model has been developed based on the water model experiments for the basic designing of a com-mercial scale PM facility. The dimensions and operational conditions of the facility have been discussed to achieve the same stirring intensity, hence the same ability in deoxidation treatment, as that obtainable in RH treatment.