【摘 要】
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In this paper, an environment-friendly hydrometallurgical process has been proposed for the recovery of high valued metals (nickel and cobalt) from spent lithium-ion batteries.Firstly, Ni, Co, Mn and
【机 构】
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Key Laboratory of Resources Chemistry of Nonferrous Metals,College of Chemistry and Chemical Enginee
【出 处】
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The 6th International Conference on Hydrometallurgy(第六届国际湿法冶
论文部分内容阅读
In this paper, an environment-friendly hydrometallurgical process has been proposed for the recovery of high valued metals (nickel and cobalt) from spent lithium-ion batteries.Firstly, Ni, Co, Mn and Li were leached by organic citric acid and glucose from the waste cathode material after dismantling and peeling off aluminum foil from spent Lithium-ion batteries.Leaching efficiencies as high as 97％,96％, 94％ and 99％ of Ni, Co, Mn and Li were achieved under the optimal experimental conditions of citric acid concentration of 1.5 mol·L-1, reaction time of 90 min, reaction temperature of 90 C, S/L of 20 g·L-1 and MSRL (glucose content) of 1.2.Then nickel and cobalt were selectively precipitated by dimethylglyoxime reagent and ammonium oxalate solution respectively.Under the optimum reaction conditions, over 98％ of nickel and 95％ of cobalt were separated and recovered as nickel dimethylglyoxime complex precipitate and cobalt oxalate hydrate precipitate respectively.The nickel dimethylglyoxime complex precipitate can be dissolved in 4 mol.L-1 hydrochloric acid solution and dimethylglyoxime could be regeneration and reused as precipitant.It is a relatively simple and environment-friendly route for the recovery of nickel and cobalt from spent lithium-ion batteries.
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