Effects of basicity and temperature on mineralogy and reduction behaviors of high-chromium vanadium-titanium magnetite sinters
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The effects of basicity and temperature on the reduction process of Hongge high-chromium vanadium-titanium magnetite (HCVTM) sinter were investigated in this work. The main characterization methods of X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscope (SEM), and metallographic microscope were employed in this study. In this work, the reduction of HCVTM sinter with different temperature and basicity were experimented. The Fe, FeO, and TiO in reductive samples increase with increasing basicity and temperatures. The increase of basicity and temperature is favorable to the reduction of HCVTM sinter. The Fe phase has out-migration tendency to the surface of sinter while the perovskite and silicate phases have in-migration tendency to the inside of sinter. The reduction degradation index (RDI) decreases while the reduction index (RI) increases with increasing basicity. The RI increases from 67.14% to 82.09% with increasing temperature from 1073 K to 1373 K.
Key wordsbasicity high-chromium vanadium-titanium magnetite sintering pot test mineralogy reduction behavior
在本工作中,研究了碱度和温度对红格高铬钒钛烧结矿还原过程的影响。本研究主要采用了 XRF,XRD,SEM 和金相显微镜的表征方法。在本文中,研究了不同温度和碱度对高铬钒钛烧结矿 的还原行为。还原烧结矿中的Fe,FeO 和TiO 含量随着碱度和温度的升高而增加。结果表明升高碱度 和温度有利于高铬钒钛烧结矿的还原。其中,Fe 相有向烧结矿表面迁移的趋势,而钙钛矿和硅酸盐相 有向烧结矿内部迁移的趋势。随着碱度的增加,低温还原粉化指数(RDI)降低,而还原指数(RI)增加。 当温度从1073 K 升高到1373 K 时,RI 从67.14%增加到82.09%。
关键词碱度 高铬型钒钛磁铁矿 烧结杯实验 矿物学 还原行为
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