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采用烧结试验,并利用矿相显微镜进行检测,研究了钛对烧结矿矿相结构的影响。研究结果表明:随着TiO2含量的增加,黏结相中钙钛矿含量显著提高,铁酸钙呈降低趋势,玻璃相含量增加,硅酸二钙基本稳定,烧结矿中孔隙明显减少。在矿相结构中,钙钛矿多呈不定形、它形晶充填于矿粉晶粒间,部分呈树枝状集中分布;铁酸钙多为针状、柱状或板状结构,分布不均匀;硅酸二钙多为柳叶状结构分布;气孔形态不规则,裂纹多贯穿于气孔间。烧结矿黏结相强度随TiO2含量升高而降低。烧结杯试验结果表明,烧结矿的转鼓指数随着烧结矿中TiO2含量的增加而降低,与钛对烧结矿矿相结构的影响规律吻合。
Using sintering test, and the use of microscope to detect the phase, the effect of titanium on the phase structure of the sinter. The results show that with the increase of TiO2 content, the perovskite content in the binder phase increases significantly, the calcium ferrite decreases, the glass phase content increases, the dicalcium silicate is basically stable, and the porosity in the sinter decreases significantly. In the mineral structure, the perovskite is mostly amorphous, which is filled in the shape of crystal powder between the ore, some dendritic concentrated distribution; mostly ferrite calcium acicular, columnar or plate-like structure, the distribution is uneven; Dicalcium silicate is mostly willow-shaped structure distribution; irregular stomatal shape, cracks often run through the pores. The strength of sinter binder phase decreases with the increase of TiO2 content. Sintering cup test results show that the drum index of sinter decreases with the increase of TiO2 content in sinter, which is consistent with the influence of titanium on the phase structure of sinter.