The effects of basicity and Al2O3 content on the chemistry of phases in iron ore sinter containing ZnO were investigated by Rietveld analysis of the X-ray diffraction (XRD) patterns. Bulk composition analysis was carried out using inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and wet-chemical analysis. The composition of each phase was investigated using a scanning electron microscope-energy dispersive X-ray analyzer (SEM-EDX). It was found that ZnO exists in the franklinite and the silicoferrite of calcium and aluminum (SFCA) phases. With increasing ZnO content, the phase fraction of the franklinite increased, while the fraction of SFCA slightly increased. When ZnO content was fixed at 1 wt pct and basicity increased, the fraction of franklinite decreased and that of SFCA increased. Here, the solubility of ZnO in the SFCA increased. As the Al2O3 content increased, the fraction of franklinite decreased and that of SFCA increased, while ZnO content in the SFCA did not change significantly.

中文翻译：

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碱度和 Al2O3 含量对含 ZnO 铁矿石烧结矿相化学的影响

通过 X 射线衍射 (XRD) 图案的 Rietveld 分析，研究了碱度和 Al2O3 含量对含有 ZnO 的铁矿石烧结矿中相化学的影响。使用电感耦合等离子体原子发射光谱 (ICP-AES) 和湿化学分析进行整体成分分析。使用扫描电子显微镜 - 能量色散 X 射线分析仪（SEM-EDX）研究各相的组成。发现ZnO存在于钙铝相的富锌矿和硅铁酸盐(SFCA)中。随着ZnO含量的增加，富兰克林的相分数增加，而SFCA的分数略有增加。当 ZnO 含量固定在 1 wt pct 并且碱度增加时，富兰克林的含量减少，而 SFCA 的含量增加。这里，ZnO 在 SFCA 中的溶解度增加。随着 Al2O3 含量的增加，富兰克林的含量减少，SFCA 的含量增加，而 SFCA 中的 ZnO 含量没有显着变化。