Abstract

Confronted with the growing ecological awareness of the consumer market, the construction industry has been seeking strategies to promote a higher insertion of waste in the production chain while contributing to the technological improvement of processes and products, as well as mitigation of social and environmental impacts and, at the same time, conferring intangible value to the product. In this sense, the present work describes how iron ore tailings (IOT) can be used in the production of cement-based (hydraulic) tiles. The physical, chemical, and mineralogical characterizations carried out demonstrated that the IOT beneficiation (segregation) process resulted in a high-quality siliceous aggregate and a Fe-rich clay. The latter can be used as a pigment, whose pigmentation and cementing potentials improve with calcination and grinding. Compared to hydraulic tiles prepared with conventional materials, those obtained with the IOT-based materials displayed a pleasing appearance and the expected physical–mechanical performance.

Graphical Abstract

中文翻译：

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用铁矿石尾矿回收的细骨料和颜料生产的液压砖

摘要

面对日益增长的消费者市场生态意识，建筑行业一直在寻求战略，以促进废物在生产链中的更多插入，同时为工艺和产品的技术改进以及减轻社会和环境影响做出贡献。 ，同时赋予产品无形的价值。从这个意义上讲，本工作描述了如何在水泥基（液压）砖的生产中使用铁矿石尾矿（IOT）。进行的物理，化学和矿物学表征表明，IOT的选矿（分离）过程产生了高质量的硅质骨料和富铁粘土。后者可以用作颜料，其颜料化和胶合电位随煅烧和研磨而改善。

图形概要