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首页> 外文期刊>Separation and Purification Technology >Development of process flow sheet for recovery of high pure cobalt from sulfate leach liquor of LIB industry waste: A mathematical model correlation to predict optimum operational conditions
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Development of process flow sheet for recovery of high pure cobalt from sulfate leach liquor of LIB industry waste: A mathematical model correlation to predict optimum operational conditions

机译：从LIB工业废料的硫酸浸液中回收高纯钴的工艺流程图的开发：预测最佳运行条件的数学模型相关性

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摘要

The paper contains a new hydrometallurgical process flow sheet for the recovery of high pure cobalt sulfate solution/salt from waste LiCoO2 cathodic active material generated from lithium ion battery (LIB) industry waste. Cobalt was recovered as cobalt sulfate from sulfate leach liquor by solvent extraction process using Cyanex 272 as an extractant. For quantitative extraction of pure cobalt from waste LiCoO2 different process parameters such as concentration of Cyanex 272, O/A volume ratio, McCabe-Thiele extraction isotherm, scrubbing isotherm required were optimized. A mathematical model was developed to correlate metal extractability and Cyanex 272 concentrations and volume content. Optimum conditions required for quantitative extraction of pure cobalt sulfate/salt using Cyanex 272 were estimated by a proposed model. From predicted model, the mechanism for extraction and McCabe-Thiele isotherm for extraction were derived and compared with obtained results. A good agreement between proposed model and observed results was indicated. The cobalt loaded Cyanex 272 was stripped with sulfuric acid and 99.99% pure cobalt sulfate was obtained.
机译：本文包含一个新的湿法冶金工艺流程图，用于从锂离子电池（LIB）工业废料产生的废LiCoO2阴极活性材料中回收高纯硫酸钴溶液/盐。使用Cyanex 272作为萃取剂，通过溶剂萃取法从硫酸浸出液中回收了硫酸钴形式的钴。为了从废LiCoO2中定量提取纯钴，对不同工艺参数（例如Cyanex 272的浓度，O / A体积比，McCabe-Thiele提取等温线，洗涤等温线进行了优化）。建立了数学模型以关联金属的可萃取性和Cyanex 272的浓度和体积含量。通过建议的模型估算了使用Cyanex 272定量萃取纯硫酸钴/盐所需的最佳条件。从预测模型中，推导了萃取机理和McCabe-Thiele等温线，并与所得结果进行了比较。说明了所提出的模型与观察到的结果之间的良好一致性。用硫酸汽提载有钴的Cyanex 272，得到99.99％的纯硫酸钴。

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