A Novel Method for Online Detection of FeO Content in Sinter

The FeO content of the sinter is one of the essential parameters of the blast furnace smelting process. However, traditional detection methods cannot achieve accurate online measurement. In this paper, based on analyzing the composition and ferromagnetism of various substances in sinter, a novel magnetic method for online measurement of sinter FeO content is proposed. It uses the magnetic attraction of NdFeB permanent magnets on the ferromagnetic substances to find out the sinter FeO content. The 3D modeling of NdFeB permanent magnets and sinter in the Maxwell electromagnetic module of ANSYS software was performed, and the magnetic finite element analysis of sinter in different states was carried out. Simulation results show that the magnetic attraction force between the permanent magnet and the sinter obviously changes with the variation of the sinter FeO content. The proposed scheme for the online measurement of sinter FeO content in sinter is also validated by simulation results.