浙江绍兴多元素精准定向分离及精深高值转化技术数据集（2022年）

目前正极材料主要通过湿法浸出、分步除杂、逐级萃取等步骤将金属元素均转化为电池级化学产品进行回收，存在浸出率低、回收流程长、原料消耗多和产品附加值不高等问题。多元素协同浸出耦合分级深度除杂技术是简化流程、降低原料消耗与提高附加值的最佳技术之一。基于此，本课题研究三元正极材料多元素精准定向分离及精深高值转化技术。研发了退役三元锂电材料有价金属控电位协同高效浸出技术，实现了金属锂、镍、钴、锰的浸出率均保持在99%左右；研发了浸出液碱化精准除铁技术，除铁率达到99%；研发了浸出液萃取精准除铜锰技术，铜、锰萃取率均达到99%以上；开发了精制溶液萃取定向分离钴技术，钴萃取率大于99%，萃余液中钴离子含量低于0.03g/L，研发了铜锰溶液中铜深度去除及锰的定向分离、锂溶液深度除杂及分离技术，获得了锰、锂的精制溶液；创建了有价金属电池级高值产品合成技术，实现了锂、镍、钴、锰电池级产品的制备。Currently, the recovery of cathode materials primarily relies on processes including hydrometallurgical leaching, stepwise impurity removal and gradient solvent extraction to convert metal elements into battery-grade chemical products, which suffers from drawbacks such as low leaching rate, lengthy recovery process, excessive raw material consumption and low product added value. Multi-element synergistic leaching coupled with graded deep impurity removal is one of the optimal technologies to simplify the process, reduce raw material consumption and improve product added value. Against this backdrop, this study investigates the precise directional separation of multi-elements and the technology for deep and high-value conversion of spent ternary cathode materials. A potential-controlled synergistic efficient leaching technology for valuable metals from spent ternary lithium-ion battery materials was developed, achieving leaching rates of lithium, nickel, cobalt and manganese all maintained at approximately 99%. A precise iron removal technology via alkalization of leachate was developed, with an iron removal rate of 99%. A precise copper and manganese removal technology via solvent extraction of leachate was developed, with extraction rates of copper and manganese both exceeding 99%. A directional cobalt separation technology via solvent extraction of refined solution was developed, with a cobalt extraction rate exceeding 99% and the cobalt ion concentration in the raffinate lower than 0.03 g/L. Technologies for deep copper removal and directional manganese separation from copper-manganese solution, as well as deep impurity removal and separation from lithium solution, were developed to obtain refined manganese and lithium solutions. A synthesis technology for battery-grade high-value products from valuable metals was established, enabling the preparation of battery-grade lithium, nickel, cobalt and manganese products.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于退役三元锂电材料的有价金属回收，研发了多元素精准定向分离及精深高值转化技术，包括协同高效浸出、精准除杂和萃取分离等关键技术，实现了锂、镍、钴、锰的高浸出率和电池级产品制备，旨在提升资源化利用效率。数据集由南昌航空大学创建，属于环境工程学科，数据量为29.98MB，包含多个文件格式。