硫酸铝沉淀法去除锂离子电池回收过程中NMC黑色渗滤液中的氟化物

IF 7.1 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Waste management Pub Date : 2025-09-16 DOI:10.1016/j.wasman.2025.115136

Ali Aliyev , Devon Gray , Sevan Bedrossian , Gisele Azimi

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引用次数: 0

摘要

本研究提出了一种采用硫酸铝沉淀法去除nmc型锂离子电池黑液浸出液中氟化物的系统方法。研究了pH、Al2 (SO4) 3:F摩尔比、温度和反应时间的影响，以优化除氟效果，同时最大限度地减少锂、镍、钴和锰等有价金属的共沉淀。在pH为5、Al2 (SO4) 3:F比为1.75的条件下，除氟率超过97%，有价金属共沉淀率不到10%。建立了降水行为的经验模型，模型预测结果与试验结果吻合较好。与OLI热力学模型的比较揭示了过渡金属行为的差异，突出了所提供的新实验数据的价值。这些发现不仅促进了高效除氟策略的发展，而且提供了一个关键的数据集，可以支持未来改进用于锂离子电池回收系统湿法冶金建模的热力学数据库。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Fluoride removal from NMC black mass leachates during Lithium-Ion battery recycling via aluminum sulfate precipitation

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Fluoride removal from NMC black mass leachates during Lithium-Ion battery recycling via aluminum sulfate precipitation

This study presents a systematic approach for fluoride removal from pregnant leach solutions derived from NMC-type lithium-ion battery black mass using aluminum sulfate precipitation. The effects of pH, Al₂ (SO₄) ₃:F molar ratio, temperature, and reaction time are investigated to optimize fluoride removal while minimizing co-precipitation of valuable metals including lithium, nickel, cobalt, and manganese. At pH 5 and an Al₂ (SO₄) ₃:F ratio of 1.75, over 97% of fluoride was removed with less than 10% co-precipitation of valuable metals. An empirical model was developed to predict precipitation behavior, and model predictions showed good agreement with experimental results. Comparisons with OLI thermodynamic modeling revealed discrepancies in transition metal behavior, highlighting the value of the novel experimental data provided. These findings not only advance the development of efficient fluoride removal strategies but also offer a critical dataset that could support future refinement of thermodynamic databases used in hydrometallurgical modeling of lithium-ion battery recycling systems.

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来源期刊

Waste management 环境科学-工程：环境

CiteScore

15.60

自引率

6.20%

发文量

492

审稿时长

39 days

期刊介绍： Waste Management is devoted to the presentation and discussion of information on solid wastes,it covers the entire lifecycle of solid. wastes. Scope: Addresses solid wastes in both industrialized and economically developing countries Covers various types of solid wastes, including: Municipal (e.g., residential, institutional, commercial, light industrial) Agricultural Special (e.g., C and D, healthcare, household hazardous wastes, sewage sludge)