Abstract

Iron ore tailings (IOT) are common wastes in industrial iron processes, which are harmful to the environmental and industrial development. Therefore, developing an efficient process for the recycling and utilization of IOT is of extreme importance. In this work, the influences of the sintering temperature and SiC content on the material properties of foam ceramics developed from IOT were investigated. More specifically, bulk density, water absorption, and microstructure of the materials were discussed. In addition, the foaming mechanism was analyzed. The experimental results showed that the average pore size of the material gradually increased and the bulk density decreased with increasing sintering temperature. On the other hand, the bulk density of the samples decreased and the water absorption increased with increasing SiC content. An optimal lightweight foam ceramic was fabricated from 55 wt.% IOT and 0.10 wt.% SiC at 1130 °C. Finally, foam ceramics as construction materials were produced with excellent material performance, including a bulk density of 0.77 g/cm³ and a uniform pore size distribution. This study describes a cleaner technology for the value-added utilization of IOT.

Graphic Abstract

中文翻译：

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温度和SiC含量对制备增值泡沫陶瓷的铁矿尾矿回收的影响

摘要

铁矿石尾矿（IOT）是工业炼铁过程中的常见废物，对环境和工业发展有害。因此，开发一种有效的方法来回收和利用物联网至关重要。在这项工作中，研究了烧结温度和SiC含量对IOT开发的泡沫陶瓷材料性能的影响。更具体地说，讨论了材料的堆积密度，吸水率和微观结构。另外，分析了发泡机理。实验结果表明，随着烧结温度的升高，材料的平均孔径逐渐增大，堆积密度减小。另一方面，随着SiC含量的增加，样品的堆积密度降低并且吸水率增加。最佳的轻质泡沫陶瓷是在1130°C下由55 wt。％的IOT和0.10 wt。％的SiC制成的。最后，生产出具有优异材料性能的泡沫陶瓷作为建​​筑材料，其堆积密度为0.77 g / cm³，孔径分布均匀。这项研究描述了一种用于物联网增值利用的更清洁的技术。

图形摘要