烧结矿的强度在很大程度上取决于粘结相矿物的组成及结构。用磁铁精矿生产的熔剂性烧结矿的粘结相主要是钙铁橄榄石[(GaO)_x·(FeO)_(z-)·SiO_2,X=1-1.5]及少量的硅酸一钙、硅酸二钙、铁酸钙及玻璃质等。由于主要粘结相矿物强度较差和硅酸二钙冷却到500℃以下时,有β形向γ形的晶相转变,体积增大10%,使已固结成形的烧结矿发生粉化。硅酸二钙在一般的烧结温度虽含最不大(1～5%),但由于存在烧结 The strength of sinter depends very much on the composition and structure of the binder phase minerals. The binder phase of fluxed sinter produced with magnetite concentrate is mainly feldspar [(GaO) _x · (FeO) _ (z-) · SiO_2, X = 1-1.5] and a small amount of monocalcium silicate , Dicalcium silicate, calcium ferrite and vitreous and so on. As the main binder phase mineral strength is poor and calcium silicate cooled to below 500 ℃, there β-to γ-shaped crystal phase transformation, the volume increased by 10%, the consolidation of sintered sinter occurs pulverization. Although dicalcium silicate contains the least amount (1 to 5%) of the usual sintering temperature,