Numerical Modeling of the combination between reactive cleaning and active filtration in an induction crucible furnaceWednesday (07.10.2020) 13:00 - 13:20
Non-metallic inclusions removal plays a significant role in order to gain ‘high steel quality’. Using carbon-bonded cellular foam filters is an innovative way to remove non-metallic inclusions from steel melts. The filters can act active and reactive. In case of active filtration, the inclusions are deposited on the filter walls. In the reactive cleaning, the carbon gets dissolved from the filter material into the melt and reacts with oxygen to form carbon monoxide bubbles. Then, the carbo-thermal reaction with oxygen leads to the formation and growth of carbon monoxide bubbles on the inclusion surfaces. These bubbles are assumed to strongly enhance the flotation of the inclusions into a top slag layer.
The capability and the efficiency of the carbon-bounded cellular foam filters are tested at TU Bergakademie Freiberg within the Collaborative Research Center 920 (CRC 920) by operating a real steel casting simulator (SCS) and by numerical simulations.
In the talk, a numerical model for the combination between the reactive cleaning and active filtration is introduced in the induction crucible furnace investigated in CRC 920. The results shows that the reactive cleaning has considerable impact on the inclusions removal and the number of the removed inclusions rises with increasing the number of the reactive filters immersed in melt. Moreover, one can conclude from the results that the contribution of reactive cleaning is much higher than that of the active filtration.