PURPOSE: To improve the efficiency of a dephosphorization treatment and to save flux by controlling the rolling movement of a vessel for preliminary treatment with a detector for the holding amt. of molten iron provided in a dephosphorization chamber thereby maintaining the specified amt. of the molten iron to be transferred into the dephosphorization chamber.
CONSTITUTION: Plural treating chambers including a dephosphorization treatment chamber 2 provided with a detector for the holding amt. of molten iron (for example, electrodes 7, 8, a detetor 12, etc.) and a desiliconization chamber 1 are connected linearly. Such a vessel 3 for preliminary treatment is rotated or rolled around a horizontal shaft 17 to move the molten iron through a conduit port 5 provided in the partition wall between the chambers 1 and 2. The rotation or rolling of the vessel 3 is controlled in this stage by the above-described detector so as to maintain the specified amt. of the molten iron to be transferred from the chamber 1 to the chamber 2. The entire volume of the low phosphorus iron after the dephosphorization treatment is thus tapped, whereby the treatment efficiency for dephosphorization is improved and flux is saved.
KOJIMA SHINJI
TAKASHIBA NOBUMOTO
