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通过研究承钢三种含铁精粉(黑山精粉、承德普通精粉、小营精粉)的矿相结构,差热分析及烧结特性,结果表明:三种铁矿粉均为典型的磁铁矿,铁品位、SiO2含量较低,TiO2、Al2O3、FeO含量较高;根据差热分析,三种矿粉均主要以磁铁矿形式存在,没有赤铁矿包裹磁铁矿的情况,矿粉增重的初始温度都比较低,高温区间TG曲线上升的斜率相同,均符合磁铁矿的氧化动力学条件;三种铁精粉单烧的垂直烧结速度慢,废气温度较低,烧损率较低,转鼓指数均较低,黑山精粉的转鼓指数最低,仅有55.33%;经混料烧结后,烧结矿转鼓指数得到明显提升,最高达到64.40%。研究结果为中钛型钒钛磁铁矿烧结提供了理论基础。
Through the study of the mineral structure, differential thermal analysis and sintering characteristics of the three iron-bearing fine powders (Heishan Powder, Chengde Ordinary Powder and Xiaoying Fine Powder), the results show that the three kinds of iron ore powders are all typical magnetic According to the differential thermal analysis, all three kinds of ore are mainly in the form of magnetite, and there is no case of hematite surrounding the magnetite. The initial temperature of powder weight gain is relatively low, the slope of TG curve rising in the high temperature range is the same, which are in line with the oxidation kinetics of magnetite. The vertical sintering speed of the three kinds of iron powder single burning is slow, the exhaust gas temperature is low, The lower the drum index, the lower the drum index of Montenegro, only 55.33%. After the mixture sintering, the sinter drum index has been significantly improved, up to 64.40%. The results provide a theoretical basis for the sintering of medium-sized vanadium-titanium magnetite.