The sea sand vanadium titanomagnetite has the problems of coarse particles, difficult agglomeration, and poor sintering performance. It is difficult for iron and steel enterprises to use it as an ironmaking raw material in large quantities. In this work, different methods were adopted to optimize the high-temperature sintering characteristics of sea sand vanadium titanomagnetite to increase the usage of sea sand ore. Based on the characterization and analysis of the basic physical and chemical properties of sea sand ore, the effects of adding limestone, ludwigite, and fine powder on the high-temperature sintering characteristics of sea sand ore were discussed. The proportion of sea sand ore was varied and its effect on the high-temperature sintering characteristics was studied. The phase composition and microstructure of sintered blocks with sea sand ore were analyzed by XRD and SEM–EDS, and the high-temperature sintering mechanism was studied. The results show that the high-temperature sintering characteristics of sea sand ore can be optimized to a certain extent by adding limestone, ludwigite, and fine powder. It is suggested that 15–35 wt% of sea sand ore was appropriate. The experimental results provided some reference methods for iron and steel enterprises to improve the utilization rate of sea sand ore in the actual sintering process.

Graphical Abstract

中文翻译：

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基于微烧结的海砂钒钛磁铁矿高温烧结特性及烧结机理研究

海砂钒钛磁铁矿存在颗粒粗、难团聚、烧结性能差等问题。钢铁企业难以大批量用作炼铁原料。本工作采用不同的方法优化海砂钒钛磁铁矿的高温烧结特性，以提高海砂矿石的利用率。在对海砂矿基本理化性质进行表征和分析的基础上，探讨了添加石灰石、硅铁矿和细粉对海砂矿高温烧结特性的影响。研究了海砂矿的比例变化及其对高温烧结特性的影响。采用XRD和SEM-EDS分析了海砂矿烧结块的相组成和显微组织，研究了高温烧结机理。结果表明，添加石灰石、硅铁矿和细粉可以在一定程度上优化海砂矿的高温烧结特性。建议 15-35 wt% 的海砂矿石是合适的。实验结果为钢铁企业在实际烧结过程中提高海砂矿的利用率提供了一些参考方法。建议 15-35 wt% 的海砂矿石是合适的。实验结果为钢铁企业在实际烧结过程中提高海砂矿的利用率提供了一些参考方法。建议 15-35 wt% 的海砂矿石是合适的。实验结果为钢铁企业在实际烧结过程中提高海砂矿的利用率提供了一些参考方法。

图形概要