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在高价值的多金属尾矿利用过程中,有效减少,排毒和环境评估的可持续战略

Du Wei¹, Li Kongzhai¹, Yu Yong¹

¹Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction, Ministry of Education, School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.

Journal of hazardous materials

|December 27, 2025

概括

这项研究提出了一种用于减少和解毒多金属尾矿中的 (As) 的新方法. 该过程将危险的AS废物转化为有价值的产品,最大限度地减少环境污染.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.

背景情况:

多金属尾矿含有大量的 (As) 储量,造成环境危害.
现有的As排毒方法在可扩展性和效率上是有限的.
了解热处理下的As相行为对于有效管理至关重要.

研究的目的:

开发一种新战略,以有效地减少和多金属尾矿的排毒.
评估废弃物处理的环境影响和可行性.
探索经过处理的尾矿的高价值利用.

主要方法:

研究了温度和铁 (Fe) 矿物质对酸盐再分配和毒性的影响.
使用的碳酸减速剂用于As相变换.
优化处理条件 (温度,添加剂,时间) 以最大限度地去除As和产品回收.

主要成果:

复杂As相被确定为酸盐/As-Fe氧化物,受温度和Fe矿物质的影响.
在973-1273K时,被转化为挥发性As4 (g) 或浸出到溶液中 (>10 mg/L).
在优化条件下 (2重%B + 6重%P,1348K,90分钟),99.19%的废被捕获为尘埃,产生99.5%的As2O3. 还生产了高价值的铁粉 (98.12%Fe).

结论:

首次实现了多金属尾矿的高效As减少和无害处理.
开发了一种高价值的加工方法,最大限度地减少与As相关的生态环境污染.
这种方法对于重复使用危险废物,如红泥和洗的残留物具有重要意义.

关键词:

作为有效的减少和排毒.高价值的利用方式多金属尾部,是指多金属尾部.典型的As阶段的有针对性的迁移.

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