For sinter with 25% and 50% MAC fines the iron oxides mainly consisted of hematite and magnetite, the bonding phase were mainly dicalcium silicate, glassiness, and a few amount of calcium ferrite.
配比为25%和50%的两种中铁氧化物均以铁、磁铁为主,主要以铁酸钙、硅酸二钙和玻璃质为主,但铁酸钙数量不多。