使用废弃的铜尾作为飞基活性材料合成的前体
Arturo Reyes-Román1, Tatiana Samarina2, Daniza Castillo-Godoy1
1Department of Mining Engineering, University of Antofagasta, Avenida Angamos 601, Antofagasta 1270300, Chile.
Materials (Basel, Switzerland)
|September 13, 2025
概括
本研究探讨使用铜矿尾矿在飞基活性材料 (FA-AAMs) 中. 这些发现显示了可持续建筑材料的潜力,具有良好的强度和固定危险元素.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 环境科学 环境科学
背景情况:
- 废弃的铜矿尾矿 (Cu尾矿) 带来了环境挑战.
- 基于飞灰的活性材料 (FA-AAMs) 为传统水泥提供了一个可持续的替代品.
- 工业副产品的价值化对于循环经济原则至关重要.
研究的目的:
- 评估利用Cu尾矿作为FA-AAMs中的前体的可行性.
- 开发和描述FA-AAM配方,其中包括Cu尾巴.
- 评估开发材料的机械性能,微观结构和环境安全.
主要方法:
- 制备了两个配方:G1 (70%的Cu尾矿,30%的飞灰) 和G2 (G1+15%的普通波特兰水泥).
- 材料使用XRF,XRD,FESEM-EDS和粒子大小分析进行了表征.
- 经过120天的固化后,进行了压力强度,毛孔性和浸出性测试.
主要成果:
- 尾矿充当了惰性填充剂,而飞灰提供了无形的含量.
- 与G1 (24 MPa) 相比,G2配方 (含OPC) 实现了更高的压力强度 (41 MPa).
- G2 呈现出比 G1 (52% 孔径) 更密集的微观结构 (35% 孔径).
- 泄漏试验证实了危险元素如的固定在法规限制以下.
结论:
- 在FA-AAM中重复使用Cu尾矿是可行的,有助于废物回收利用和循环经济.
- 开发的材料显示了非结构性建筑部件或废物封装的潜力.
- 尽管设置时间延长了,但这些材料表现出良好的化学稳定性和长期性能,减少了环境足迹.
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