废物屏障材料从电解电池中的水-HCl顺序水
Yujie Zhao1,2, Saiya Li1, Junfeng Cheng1
1School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
Materials (Basel, Switzerland)
|May 7, 2025
概括
本研究介绍了一种两阶段的水-盐酸浸出方法,用于从生产废物中回收. 该过程有效提取,同时显著减少有害的酸排放.
科学领域:
- 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.
- 环境科学 环境科学
背景情况:
- 通过Hall-Héroult工艺生产会产生富含的废物.
- 传统的酸性漏会因为酸 (HF) 排放而带来环境风险.
- 从这些废物流中有效地回收对于资源可持续性至关重要.
研究的目的:
- 开发和评估一种新的两阶段水-HCl序列漏 (WHSL) 方法来回收.
- 尽量减少与提取相关的环境影响,特别是酸 (HF) 排放.
- 为了优化关键的工艺参数,并比较WHSL的疗效与传统的HCl出.
主要方法:
- 一个两阶段的浸过程,包括最初的水浸,然后是盐酸 (HCl) 浸.
- 系统评估参数:液体-固体比,温度,持续时间,旋转速度和HCl度.
- 使用X射线衍射 (XRD),富里埃变换红外光谱 (FTIR),差分扫描热量计 (DSC) 和扫描电子显微镜 (SEM) 进行液残留物的表征.
主要成果:
- 最初的水浸有效地溶解了NaF盐,在废物上产生了表面变化.
- 随后的HCl液选择性地回收了,形成了凝,并保留了nepheline阶段.
- 在WHSL过程中,产生了具有较小颗粒大小和表面潜力的多孔残留物,促进了体聚合.
- 优化的WHSL证明了高效的回收,减少了酸消耗.
结论:
- 两阶段的WHSL方法为从生产废物中回收提供了一种有效和环保的替代方案.
- 这种方法显著减轻了与酸 (HF) 排放相关的风险.
- WHSL工艺提高了回收效率,并减少了整体的酸性使用.
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