PRELIMINARY TREATMENT DEVICE FOR MOLTEN IRON

摘要

PURPOSE:To permit an easy slag-off treatment and to prevent the hindrance of the passage of a molten iron by solidification of the residual iron by tiltably disposing a reaction vessel to the molten iron spout part between the large spout of a blast furnace and molten iron tilting spout and supplying a preliminary treatment agent to the molten iron dropped and poured into the reaction vessel. CONSTITUTION:The molten iron from which blase furnace slag is removed is dropped and poured from the molten iron spout 10 into the reaction vessel 11 and a desiliconizing agent is supplied by a lance 9 to the dropping position so as to react with the molten iron, by which the molten iron is separated to desiliconized slag 15 and desiliconized iron 16. The slat 15 and iron 16 are respectively discharged by a skimmer 12 to a desiliconized slag discharge spout part 13 and a desiliconized iron discharge spout part 14. The vessel 11 is tilted to the molten slag spout 17 side by a hydraulic cylinder 24 to discharge residual slag 41 to the spout 17 when there is no more inflow of the molten iron to the vessel 11 upon completion of one tapping. The reaction vessel is then tilted to the molten iron spout 18 side to discharge the residual iron 29 to the spout 18. The solidification of the residual iron 29 is thereby prevented and the failure in the next tapping and desiliconization treatment is averted.