| 摘要 |
The invention relates to the production of stainless steel of AISI 4xx grade, especially AISI 430 grade, ferritic steel from liquid pig iron and FeCr solids. According to the invention, an AOD (argon oxygen decarburization) method is used, wherein oxygen and an inert gas (low-reactivity gas) are blown together through nozzles into the bath and fromthe top onto the surface of the bath using a lance. The aim of the treatment is to finish a melting charge within an optimum interval, to achieve the desired tapping temperature and composition and to reduce chromium losses. This aim can be achieved by using the corresponding technology and a metallurgical process model which observes, predicts and controls the treatment of the melting charge. |
