Abstract: The effects of penetration behavior of the calcium ferrite (CaO·Fe2O3 or CF) melts to which SiO2 or Al2O3 has been added on the sintered hematite as matrix to be penetrated was investigated experimentally, as well as its effect on the compressive and rupture strength of sinter specimens. The results showed that the penetration of the CF-based melts into sintered hematite was suppressed by the additive SiO2 or Al2O3. The sintered hematite with CF to which 2 wt% of SiO2 was added at 1300°C and held for 20 min can offer the highest compression and rupture strength because the melting time of CF melts with SiO2 added in is shorter with penetrability improved, thus forming sufficiently the liquid phase with high liquidity in sintering process to enhance the consolidation effect between adhesion phase and iron ore particles.