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%烧结矿中铁氧化物均铁矿、磁铁矿为，粘结相铁酸钙、硅酸二钙和玻璃质为，但铁酸钙数量不多。