| 摘要 |
The invention is concerned with a process for producing high-quality steel having a pre-selected carbon content from a melt. The process of the invention comprises decarburizing a melt in a converter by top-blowing the melt with oxygen such that the carbon content of the melt is lowered to less than about 0.1% carbon. A slag is created on the melt and carbon is delivered into the melt at a high velocity whereby the melt and the slag mix, the carbon being delivered to the melt until the oxygen content of the melt is less than or equal to about 250-400 ppm oxygen and the carbon content of the melt is greater than or equal to about 0.04-0.07% carbon. Recarburization of the melt is then effected in either the converter or a ladle whereby a melt containing as little oxygen as is reasonably possible and having a carbon content which is as close as possible to a pre-selected carbon content is achieved. the melt upon meeting such requirements is finally transferred to a ladle and treated both with a synthetic slag and with a material that is both deoxidizing and desulphurizing. |
