PRETREATMENT OF MOLTEN IRON WITH CONVERTER SLAG

摘要

PURPOSE:To utilize effectively much Fe and Ca contained in converter slag and the heat energy of the slag by bringing molten iron discharged from a blast furnace into contact with the converter slag in the form of molten or hot slag in a mixer before the molten iron is charged into a refining furnace. CONSTITUTION:Molten iron discharged from a blast furnace and desiliconized optionally in a spout is pretreated before it is charged into a refining furnace. The pretreatment is carried out by bringing the molten iron into contact with converter slag in the form of molten or hot slag in a mixer. For example, the converter slag is added at the lower part of a spout extended from the blast furnace. The amount of the converter slag added is 5-100kg, especially, 1-50kg per 1ton molten iron.