| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a steelmaking method using two or more sets of converters which dephosphorize-refine molten iron in one side of the converter and charge this molten iron into the other side of converter to execute decarburize-refining within the dephosphorize-refining time. SOLUTION: (a) In one side of the converter, the molten iron having <=0.3wt.% Si content in the molten iron is dephosphorize-refined in a prescribed time. (b) The dephosphorize-refined molten iron is charged into the other side of converter and the decarburize-refining is mainly executed substantially within the above prescribed time. Further, in the converter executing the dephosphorize- refining, the whole quantity of scrap can be charged. In the converter executing the decarburize-refining, previous to charge of the dephosphorize-refined molten iron, slag-making agent containing MgO is charged into the converter, and MgO concn. of the produced slag is made to 10wt.%, and after tapping the decarburize-refined molten steel, the slag-coating is executed.</p> |
