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关于CGF固化/稳定离子型稀土尾矿强度和有毒漏特性的研究

Zhongqun Guo¹, Qiangqiang Liu², Shaojun Xie²

¹School of Civil Engineering and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China; Jiangxi Provincial Key Laboratory of Water Ecological Conservation in Headwater Regions, Ganzhou, 341000, China.

The Science of the total environment

|October 16, 2025

概括

这项研究表明,一种新型的固体废物渣稳定剂 (CGF) 能够有效地处理离子吸附的稀土尾矿,增强强度并固定 (Pb) 和 (Zn) 等有毒金属. 稳定的尾矿达到低风险状态,促进可持续的采矿实践.

科学领域:

地质技术工程地质技术工程
环境科学环境科学
材料科学材料科学材料科学

背景情况:

离子吸附的稀土尾矿由于重金属污染而带来了环境挑战.
这些尾矿的资源再利用对于稀土采矿业务的可持续发展至关重要.

研究的目的:

研究一种新型固体废物渣渣稳定剂 (CGF) 的有效性,用于处理离子吸附稀土尾矿.
评估CGF对尾矿机械强度和重金属稳定性的影响.

主要方法:

使用了一种复合稳定剂 (CGF),包括碳化渣,颗粒高炉渣和飞灰.
应用固化/稳定技术来处理具有不同CGF含量和固化时间的稀土尾矿.
使用风险评估代码评估压力强度,重金属液 (Pb和Zn) 和稳定金属的化学形式.

主要成果:

CGF显著提高了稀土尾矿的压力强度,在经过7天的固化后超过350kPa.
在28天的固化过程中,Pb和Zn的缩度下降到低于监管限值 (Pb<5 mg/L,Zn<100 mg/L).
和主要在具有低风险状态的稳定残留形式中发现 (风险评估代码<10%),归因于无形水化凝 (C-(A) -S-H) 的形成.

结论:

CGF稳定剂有效地提高了离子吸附稀土尾矿中的强度和稳定有毒金属 (Pb和Zn).
形成C-(A) -S-H凝在通过沉,吸附和封装来固定重金属方面发挥着关键作用.
这种固化/稳定方法为稀土尾矿的资源再利用提供了可持续的解决方案,减少了环境风险.

关键词:

复合活性化材料是一种复合活性化材料.离子类型的稀土尾矿.固化 / 稳定固化 / 稳定有毒的洗有毒的洗没有限制的压力强度.

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