METHOD FOR DECHROMING AND/OR DENICKELFYING LIQUID SLAGS.

摘要

In a method for dechroming and/or denickelifying liquid slags or slag mixtures, in which the liquid slag is charged onto a metal bath, in particular an iron bath, and reduced by feeding carbon or carbon carriers, the carbon feed into the metal bath is effected until a decrease of the Cr and/or Ni oxide contents of the slag to a value of between 0.8 wt.-% and 0.2 wt.-%. As the pregiven Cr oxide content range of the slag is reached, reductants having higher reduction potentials such as, e.g. , Al, Ca, Si, Fe-Si or Ca-Si are added in order to lower the Cr and/or Ni oxide contents to below 0.15 wt.-%, preferably below 0.08 wt.-%.