Wet Recovery of Material Solution for Lithium Positive Electrode to Remove Calcium and Magnesium

During the wet recycling process of lithium battery cathode materials, the nickel cobalt manganese solution often contains various metal impurities (such as Fe, Al, Cu, Ca, mg, or Pb). If these impurities are not removed, they can affect the quality and performance of the synthesized lithium battery cathode materials after recycling.

The existing technology for removing metal impurities such as Fe, Al, Ca, and Mg has the problem of difficult filtration and washing of precipitates, resulting in residual impurities that cannot be filtered in the actual filtrate. These impurities will be mixed into the subsequent steps, ultimately causing high impurity content in the ternary precursor product. At the same time, due to the difficulty of filtering and washing precipitation, higher requirements are placed on the filtration equipment during the filtration process, increasing the demand for cleaning water, and requiring more time for filtration. Some gel like filter residues even have high liquid content and are prone to clogging the filter material, making it impossible to wash. This increases the difficulty of filtration and washing operations, reduces the recovery rate of nickel, cobalt, and manganese metals, and increases the recovery cost.

Therefore, it is necessary to provide a method for impurity removal and treatment in the recycling process of scrapped positive electrode materials for lithium batteries.

The HP8/HP4040 resin developed by Haipu has strong selectivity for calcium and magnesium ions, and can selectively remove divalent metal cations from wastewater treatment containing monovalent cations, allowing divalent metal cations and other divalent cations to be easily separated from monovalent cations like calcium.

Innovative Materials Technology/Service Energy Metals/Leading the Resource Cycle

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