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固定含有Cr(VI) 的尾矿,使用泥凝固材料来填充水泥糊:硫酸盐和石灰岩添加的影响

¹Department of Mining Engineering, Luliang University, Lvliang, 033000, China. 2190078@stu.neu.edu.cn.

Environmental science and pollution research international

|July 21, 2023

概括

这项研究开发了一种具有成本效益的使用渣基材料来处理 (VI) 污染的矿山尾矿的水泥糊补充. 优化的混合物实现了高压力强度和出色的重金属固定.

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:

矿山尾矿含有重金属如 (VI) 构成严重的环境风险.
混凝土回填充 (CPB) 是矿山尾矿处理的常见方法.
在CPB中普通波特兰水泥 (OPC) 的高成本影响了矿山生产经济.

研究的目的:

调查使用基于渣的水泥材料作为CPB的OPC的可持续替代品.
评估烟气脱硫石膏 (FGDG) 和石灰岩作为CPB特性修饰物的有效性.
评估开发的CPB的机械强度和 (VI) 固定能力.

主要方法:

基于渣的水泥材料是为了CPB应用而制定的.
烟气脱硫石膏 (FGDG) 和石灰岩在不同比例上被纳入.
使用6重%FGDG和3重%石灰岩 (A6L3) 的混合物被确定为最佳.
评估了压力强度和Cr(VI) 固定效率.

主要成果:

该A6L3混合物达到约5.53MPa的压力强度,与基于OPC的CPB相比.
在Cr(VI) 固定效率达到约99.5%.
FGDG促进了乙岩的形成和结构紧性,而石灰岩提高了包装密度.

结论:

用FGDG和石灰岩修改的泥渣式水泥材料为处理受Cr (VI) 污染的矿山尾矿提供了可行的,具有成本效益的解决方案.
优化的A6L3混合物表现出卓越的机械性能和重金属固定.
这种方法为矿山废物管理和环境修复提供了一个可持续的替代方案.

关键词:

粘合剂粘合剂粘合剂混凝土糊的补充填充方式含有Cr (VI) 的尾矿.固定化固定化固定化石灰石的石灰岩是一种石灰岩.

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