| 摘要 |
PURPOSE:To reduce slag sources entering the inside of furnace and save heat energy and treatment time by blowing carbonaceous powder and oxygen into the molten iron of low silicon and low phosphorus in a converter. CONSTITUTION:While blast furnace molten iron is being stirred, oxygen sources and the like are supplied, whereby desiliconization and dephosphorization are carried out. The molten iron of low silicon and low phosphorus obtained in this way is charged into a converter, and chromium sources and the like are added thereto. Next, carbonaceous powder is blowed through the tuyere installed under the molten iron surface of the converter, and oxygen refining by top blowing is carried out, thus while the oxidation of the carbon and chromium in the molten metal is being suppressed, the dissolution and decarburization refining of solid raw materials are accomplished. |
