Effect of CaCl2 on RDI and RI of Sinter

On the premise of maintaining the reducibility of sinter unchanged, it is of great significance to reduce the RDI (reduction degradation index) of sinter, which will improve the permeability of blast furnace burden column, so as to realize stable and smooth performance, and keep high yield and low consumption. Under laboratory conditions, a study on the RDI and RI (reduction index) of sinter was proposed, in which the sinter was immersed in solutions with different types and concentrations. In order to study the mechanism of CaCl2 effect on the RDI and RI of sinter, analysis based on the methods of IR spectra, SEM and chalcography was adopted. The results show that Cl− is the main factor reducing the RDI of sinter, and the RDI and RI of sinter decrease with the increase of Cl− concentration. With comprehensive consideration of the RDI and RI of sinter, when the concentration of Cl− is 2%. the RDI of sinter will be significantly reduced and RI will not be affected.