| 摘要 |
PURPOSE:To carry out the simultaneous treatment of dephosphorization and desulfurization in the same treating container in good efficiency, by a method wherein the interior of a container is divided into two chambers by a partition wall providing a communication part thereunder and a dephosphorizing agent and a desulfurizing agent are supplied into each chambers in opposite directions relative to the partition wall. CONSTITUTION:A partition wall 3 providing a communication part to the under side thereof is inserted into a pretreating vessel 2 having molten iron accommodated therein to divide the same into a first chamber 21 and a second chamber 22. A dephosphorizing agent 6 is blown into the first chamber 21 in the opposite direction relative to the partition wall 3 by using a lance 5 and, at the same time, a desulfurizing agent 8 is blown into the second chamber 22 in the opposite direction relative to the partition wall 3 by using a lance 7 or placed on the surface of the molten iron 1. By this method, dephorization reaction is advanced in the chamber 21 to prepare slag 41 with high FeO content while desulfurization reaction is advanced to prepare slag 42 with low FeO content without mutually mixing the phosphorizing agent 6 and the desulfurizing agent 8. The molten iron 1 during treatment is flowed through the under side of the partition wall 3 and the total amount of the molten iron 1 in both chambers 21, 22 is subjected to dephosphorization and desulfurization treatments. |
