Immersion Treatment of Sinter into Calcium Halide Solution

The influences of the immersion of sinter into calcium halide aqueous solutions or suspensions and the subsequent drying of sinter on the reduction degradation index (RDI) and relative reducibility index (RI) were investigated.The immersion treatments of sinters were carried out at a room temperature in air and in vacuum. The calcium halide concentration of aqueous solution or suspension was changed from 1.0 to 10.0 wt%.When sinter was immersed into CaCl2 and CaBr2 aqueous solutions, RI remained at the same value of the original sinter, while the value of RDI decreased, in other words, the degradation during reduction was improved, particularly in case of CaBr2.On the other hand, when sinter was immersed into CaF2 suspension, the effect of the immersion treatment on RI and RDI was scarcely detected.